Troubleshooting the limit switch on the 80% AFUE gas furnace Why is my fan running all the time AVTreasures 108,923 views. Thank you for your business!. NOTE: Original part no longer available so you will receive a replacement assembly built in our shop. Power then flows through the High Limit Switch and onwards to the Control Circuit Board. Shop our vast choice of Furnace Limit Switch available to be purchased. I’m thinking its the pressure switch. Register air deflectors may help. It is designed to replace Honeywell part #s L4064B3465 L4064B3580 & L4064B2056. a moment later, the fan starts running and I set the switch back to "Auto". 13P95 Fan & Limit Control Switch. Price: $94. Eligible for Free Shipping. Hello I have a York furnace and I’m getting a code for limit switch open. One is your high limit safety, and the other(s) is the temp your fan turns on and off. net when you need replacement wood furnace parts, like this Fan Limit Switch. A fan limit switch is a component of a furnace system that determines when the furnace blower assembly for hot air turns on and off. (if the switch was used on a gas furnace, it would shut off the gas to prevent overheating. Replaces Fan Control Part Numbers:. Broan Nutone InVent Exhaust Fan with Light, 70 CFM. Buy Bryant Furnace Parts at Reliable Parts today! Factory authorized appliance parts distributor. Limit switches are found on all types of furnaces, whether they run on oil, gas or electricity. With our online Empire Heater Parts Breakdown list, we'll make sure you find what you're looking for. SWT01280 Trane High Temp. Coleman Fan Limit Switch 7710-3281 Our selection of genuine Coleman furnace replacement parts makes it easy to find any and everything you need in one easy-to. Repair your Lennox Furnace Switch for less. It works off of temperature and also provides a high-temperature safety limit. 5A75 Connect the limit side (left hand switch) according to wiring diagrams packed with the primary control, gas valve, oil burner control or stoker control. Replaces 6260230 & 6260231. The vent limit switch, which is also referred to as a fan limit switch and is typically shaped like a small metal disc, prevents damage to your furnace by shutting the. A typical limit switch, rotary switch, or magnetic switch automatically monitors the travel limits of a particular device and can activate or deactivate power to machinery when travel limits have been exceeded. Manufacturer #: 3L01-190. 00 Pressure Switch Kit (dual) 14T6401, 14936-01 Replaces Lennox: 93W7601, 606569-04, 60656904 93W76, 74W36, 73W3601 606569-04, 606569-01, 103612-02. My furnace's high temp switch keeps tripping? It started when I adjusting vents Soon after the igniter fails, I found it in pieces. The blower will continue to run until either the system is reset, or the limit switch closes. My guess is 205F. A furnace's limit switch or fan/limit switch has 3 main functions. Home furnace wiring diagram free PDF ebook downloads Manual Reset Furnace Rollout Limit Switch. Collection of honeywell fan limit switch wiring diagram. Your home furnace combines the use of burning gas under pressure and a circulation fan that forces the warm air through the residence. Check to make sure the limit and rollouts are all closed. The G26 is a condensing 92% AFUE gas furnace. It should have two wires. Circuit, Control, Fan Board, Module; Pressure Switches; Ignitors, Sensors, Pilot Assy; Gas Valves; Main Blower Motors; Fan & Limit Switches. Buy Limit Switch 626553 CMF2 Furnace. I have an ancient Lennox furnace. I’m thinking its the pressure switch. Honeywell L4064B2236 Combination Fan and Limit Furnace Control. SOME OF THE FURNACE PARTS AVAILABLE: Furnace Circuit board, Furnace control board, furnace blower motor, inducer motor, exhaust motor, furnace fan motor, furnace coil, blower wheel, fasco,. 3-20-23139. Temperature Limit: 190° IN-STOCK. Once the furnace cools, the computer tries to fire up again. I've turned the on-off switch off at the heater but when the switch is turned back on the problem persists. Its purpose is to detect when the air in the furnace is warm enough to circulate into a home. If you don't regularly change your York furnace's air filter, it may be time to get a new one. Comfort-Aire Heat Controller Rheem Ruud Weatherking Century Furnace Fan Control. FURNACE PARTS - LIMITS - CONTROLS SWITCHES HIGH LIMITS - 8" FAN AND LIMIT CONTROL 125 F fan on and 100 F fan off AND 200F limit $98. Gas Furnace Hi Limit Switch Testing. 49 Thermo Control Aquastat - Thermo Control Aquastat. In a single-stage conventional furnace, there is one pressure switch and it has one hose leading to the body of the draft inducer fan. Find parts, manuals & diagrams for any GOODMAN Furnace/Heater, Gas repair GOODMAN Furnace/Heater, Gas Burner Box/control Panel/blower parts. The fan & limit controls in your furnace or HVAC system work by sensing the temperature increase in your machine and responding to the heat. Quality York Furnace Parts From Repair Clinic. This is an OEM replacement for old Honeywell part #s L4064B1469 L4064B1683 & L4064B2640. humidifier filters, solenoid valves, saddle valves, frames and more air cleaner filters, pleated media, electronic, hepa, hrv, uv and more furnace igniters, sensors, fan & blower motors, filters, ignition controls, control boards and more furnace parts. Fast, same day shipping. Limit Switch Functions. Fan and Limit Controls Fan/Limit Control w/ 125°F on. 10123533 In-Stock. Don't adjust the limit side - only adjust the fan side. The Infinity ® 98 furnace delivers precision comfort with Greenspeed ™ intelligence. Open 7 days a Control Board - Part # 2646321 Mfg Part # PCBBF112S. It works off of temperature and also provides a high-temperature safety limit. It has vacuum lines that are connected from the pressure switch to the ventor motor that measure a neg air pressure. A yellow glow will come from one side of the burner box. I removed the limit switch and tested it with thermometer prob taped to Ther-o-disc and blowing on it with a hair drier, it opens at about 209 degrees and closes at 179 degrees (specs say 200 off, 170 on, close enough). The williams wall heater keeps tripping the limit switch at the top of the furnace and the vent is clear. Closes at 105 deg F, opens at 85 deg F. Control Your Comfort with Fan & Limit Controls. Specifications: Element Lenght 7" Fan Off Temperature Adjustment 90 to 120F. Fan control limit switch The fan switch reads the temperature inside a furnace and once the temperature becomes warm enough turns the blower motor on sending warm air into a home. Lennox Fan Limit Switch,175°F. The fan limit control shuts the gas burners down so the furnace will not over heat and cause a fire. Remove the bushing from the bottom of the control box. 3" and Under Limits; Fan Controls. How do i reset my honeywell limit fan switch? Furnace fan limit switches 5 wire. Honeywell Fan and Limit Control with Insert includes manual and automatic fan on or off settings. A table comparing the two is below. Intertherm Nordyne Fan Switch F115-30F 626337 313516 This is a BRAND NEW OEM Intertherm/Nordyne/Miller 115 degree (F115-30F) Furnace Limit Switch. 24:44 -- old hoot ([email protected] This switch is located just under the furnace hood. Furnaces come in different efficiencies measured in AFUE. Last night I filled up the firebox with wood, to have enough heat for the night, and shortly after that, the blower stoped working. The Nordyne part # is 626279 (replaces all the old #s below). 30 part # 1005761, and # 1005762, This Cam-stat is no longer available and is replaced by a Honeywell fan limit kit Part # 1008306 May also require fan timer kit 1005263, e-mail model # for verification. Universal Integrated Furnace Control. If the temperature of the combustion chamber exceeds the preset limit, the switch will open and disrupt the flow of current to the circuit board, in effect, shutting down the main burner. Insulate ductwork if necessary. It is normally round about the size of a nickel. Williams Furnace & Williams Heater. In some cases, the limit switch will stick open and this will cause the fan to run continuously. Buy Limit Switch 626553 CMF2 Furnace. A sail switch might be used to protect a central heating system electric heating element from being energized before the air flow from the blower is established. If the blower came on at the same time as the burner, it would pump cold air through the house at first. Rheem furnaces contain an internal limit switch that regulates the fan and helps prevent the unit from overheating. I looked on this page and found the following diagram: The explanation is for a Honeywell fan & limit control, but it seems. the let her said it was the limit switch. Once the furnace cools, the computer tries to fire up again. Set Empire R9901 Fan Limit Switch. The fan & limit controls in your furnace or HVAC system work by sensing the temperature increase in your machine and responding to the heat. Rheem furnaces contain an internal limit switch that regulates the fan and helps prevent the unit from overheating. Excessive duct losses. It is a Cam-Stat Replacement SPST Combination Fan and Limit Control, with a 7" extension. Last night I filled up the firebox with wood, to have enough heat for the night, and shortly after that, the blower stoped working. range at the bottom. the on/off point for the fan is around 90-100*F. Sold by hvaconnect an eBay Marketplace seller. Power goes through the limit switch to the ignition control board. SOME OF THE FURNACE PARTS AVAILABLE: Furnace Circuit board, Furnace control board, furnace blower motor, inducer motor, exhaust motor, furnace fan motor, furnace coil, blower wheel, fasco,. In electrical engineering a limit switch is a switch operated by the motion of a machine part or presence of an object. Here you will find replacement parts for your furnace. Whether it's a commercial or residential setting, the same basic problems plague furnaces. Limit Switch (for TUE furnaces and 246 other Trane, American Standard and Cumberland, come see list) Used in (260) Trane and American Standard furnaces. When the furnace is operating properly it will extend the life of the furnace. Your fan limit switch is located directly under your furnace hood and controls when your furnace blower turns on and off. We now offer Free Shipping on all ESD Industrial Chairs. Honeywell L4064B2210 Fan and Limit Switch, 11-1/2" Insertion, for Forced Air Heating Systems. 1 result for wood furnace limit switch Save wood furnace limit switch to get e-mail alerts and updates on your eBay Feed. Essentially, this means that it determines when the hot air should be blown through your ventilation system. Fan/Limit 8" Insertion; Replaces old Honeywell® part numbers: L4064A1511, L4064A1628, L4064A1735, L4064A1966, L4064A2030, L4064A2279, L4064A2360, L4064A2469. Furnace Blower Motors ; Furnace Circuit Boards; Furnace Door Switches ; Furnace Draft Inducer Motors ; Furnace Fan and Limit Switches ; Furnace Fan Control Centers ; Furnace Fan Timer Boards ; Furnace Flame Sensors ; Furnace Gas Valves ; Furnace Humidifier Parts; Furnace Ignition Modules ; Furnace Ignitors ; Furnace Pilots; Furnace Pressure. The limit switch is a simple temperature controlled switch. To put it very simply, the furnace fan limit switch is a control that tells your furnace's fan when to turn on and off. Fast, same day shipping. MAC/MGH Furnace and INSTALLATION SEQUENCE MAC 1175 FURNACE 1. bought a different limit again. The controllers have 2 switches; one which opens the limit circuit if the plenum temperature exceeds the preset safety limit; it resets automatically. Improper operation of the furnace due to the limit control does not always indicate a defective control. Conventional furnaces may have electronic ignitions, which need special troubleshooting. The proven longevity of Thermo Pride's octagon oil heat exchanger, combined with the Limited Lifetime Warranty, virtually eliminates the worry of ever having to replace your furnace. Furnace fan limit switch. You should have 24 to 28 volts from each terminal to ground. Gas and Oil Home Heating Furnaces - Olsen HMS2 Adjusting the fan limit switch - The burners are fired up for 3 minutes before the blower turns on. The G26 is a condensing 92% AFUE gas furnace. It could be a poorly functioning limit switch or limit switch set to high. Buy Fan Limit Switch, Part #L4064B2210 with fast shipping! Our 365-day return policy guarantees you'll always get the right part!. Unfollow wood furnace limit switch to stop getting updates on your eBay Feed. If I understood the purpose of the fan/limit thermostat, I might be able to figure out how to wire it. Manual fan switch overrides the fan setpoints to keep fan running continuously. Order parts online. NOTE R Black Black Neutral Red Ground Fan Relay Fan Limit Switch or Snap Disc On Furnace Black Brown Fan Speed Tap Wires (Connect Prefered Speed Tap Wire) Fan Relay (with Fan and Limit Switch) RC Y W B R O RH G W 24-Volt Thermostat End Switch Motor Circuit LED W/Y C Terminal 2 to G Terminal 1 to C. We are Nordyne distributors and carry all the replacement parts for your Intertherm or Miller unit. Can you tell me your complete model and serial number- I can get you the unit information manual. The limit switch is a small, silver bi-metal disc about the size of a dime or quarter which turns off the furnace if the temperature inside the furnace gets too hot (see another example) It is a safety device and should not be disabled or bypassed. Check the flue for blockages and look for loose wiring. sequencers, controls, fan and limit controls, thermostats, thermal cutouts. Ductless Controls. It's possible to reset the switch at home when necessary by following a few simple steps. It's set at 160, tho all the pictures i've seen. The fan then continues to blow until the house becomes cool again, which then causes the heat to have to come back on. • Available in a variety of fan and high limit setting ranges. Honeywell furnaces have a combination control, also known as a fan limit switch, that you can adjust to control the settings on a central heating system. With our online Empire Heater Parts Breakdown list, we'll make sure you find what you're looking for. Gas Furnace Hi Limit Switch Testing. there should be continuity between the two contacts. This switch is located just under the furnace hood. The B13709-08 sometimes has part numbers: B13709-08S, B1370908S or B1370908. For Kenmore & Icp. • If your thermostat only controls the furnace and has a switch to turn the furnace on/off, switch to ON position. Fan and limit switch assembly most often found on Mac 1145, 1155 and 1165 furnaces. 00: 8" Fan & Limit Safety Control Switch 3 or 4 wire Switch: For control of high limit and fan motor in all types of forced air heating systems. It is best to consult the manual for your furnace if you want to reset the limit switch. High limit switch. Thermostat reaches setting and opens. The SWT01259 American Standard, Trane Furnace Limit Switch is a brand new OEM factory limit switch that comes in a Factory OEM box. 14 product ratings 14 product ratings - Universal Honeywell Furnace 8" Combo Fan Limit Switch L4064 A 1347 L4064A1347. Furnace Blower Motors ; Furnace Circuit Boards; Furnace Door Switches ; Furnace Draft Inducer Motors ; Furnace Fan and Limit Switches ; Furnace Fan Control Centers ; Furnace Fan Timer Boards ; Furnace Flame Sensors ; Furnace Gas Valves ; Furnace Humidifier Parts; Furnace Ignition Modules ; Furnace Ignitors ; Furnace Pilots; Furnace Pressure. Do not use this item for any installation or repair of potable water applications. In a single-stage conventional furnace, there is one pressure switch and it has one hose leading to the body of the draft inducer fan. To put it very simply, the furnace fan limit switch is a control that tells your furnace’s fan when to turn on and off. Top Rated Plus. Perfect for solar heating projects. Supply Air Fan Operating Mode Schedule. 7" Fan Controls; 3" Fan Controls; Hydronic (Hot Water) Heating Parts. ) CIRCULATING AIR BLOWER FAN/LIMIT CONTROL The blower to circulate room air through the furnace Fan/Limit Contro! provides power Cir- starts as soon as the internal. Please feel free to email us anytime if you have a question. Remove the bushing from the bottom of the control box. Finding the limit switch in a Rheem furnace takes just seconds. Gas Furnace Hi Limit Switch Testing. The circuit board in your furnace is the brains of your heating system, and the component that tells the entire model what it should be doing to circulate heat or cool air around your home. Snap disk fan switch. Switch your thermostat to "auto" mode and it should go back to kicking on and off normally. Check to make sure the limit and rollouts are all closed. Control Your Comfort with Fan & Limit Controls. What the Limit Switch Does. If the plenum gets too hot, the limit switch shuts off the burner. Hello, I'm new to the forum and I've been in the field for about 4 yrs now but I ran into something that I never seen before. If your thermostat controls the furnace and the air conditioner make sure the switch is set to FURNACE. Easy to Remember Type Numbers — L for Limit, F for Fan;. In the line control diagram of a Trane EUADH 07A model electric furnace shown in Figure 14-7, each heating element is shown with a high-limit control device located between the heating element and the time-delay relay. Limit switch. However, for your own safety, don't attempt to reset the switch without first consulting your furnace's instruction manual. The limit switch is a small, silver bi-metal disc about the size of a dime or quarter which turns off the furnace if the temperature inside the furnace gets too hot (see another example) It is a safety device and should not be disabled or bypassed. Furnace and Air Conditioner Parts for sale innace filters. The limit switch shuts off the burner when the temperature exceeds a preset temperature. Sold by hvaconnect an eBay Marketplace seller. What do you set your fan limit control settings for on a gas furnace, that is the Off - On - Off settings? 90* Off, 140* On, and 220* Off?. Just as it. Note the location of the blower switch and the limit switch. As power is delivered to the control board it opens the gas supply and causes the DSI igniter to spark. Furnace ignited, blower continued to run for about 30 seconds at which the blower the shut off and then after a short period of time the limit switch opened again and everything shut down. com We would love to help you out and have your business! Features. Sail switches find application in the detection of fluid flow and measurement of fan speeds. I have a Caddy wood/electric furnace. Find Furnace Fan Limit Switches related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of Furnace Fan Limit Switches information. 33-48 of 142 results for "furnace fan limit switch" Skip to main search results Amazon Prime. Watsco Components BC-7059-HQ Limit Switch HQ-1065188-WA replaced by HQ1005229WA Fan Timer Control - Arcoaire,Comfortmaker,Heil,ICP Tempstar 1065188 Fan Timer Control 1065188 Replaces 1065287 BC-1457-AA Known listed this is used on G4P018A3A1,G4P018A3B1,G4P024A3A1,G4P024A3B1,G4P030A3B1, G4P030A3C1,G4P036A3C2,G4P036A3D2,G4P042A3B1,G4P042A3D1,. Source Normally, this switch should allow the furnace burners to warm up completely before turning the fan on and should keep the fan running just until the burners cool off slightly (to prevent damage or overheating). You can take the limit off and take it to a supplier to match it up and replace it yourself. However, the furnace fan limit switch has. I heard you can test it by pulling line off of inducer blower and if you. the the low limit is 80F. at the limit, it shuts the draft damper. I have a new filter and opened all of the supply vents. Buy HONEYWELL L4064A1347 8IN. Note: I am not a professional. It has vacuum lines that are connected from the pressure switch to the ventor motor that measure a neg air pressure. Figure out which model of furnace you have - be sure you have the correct model number - the parts are different for the different models. • Available in a variety of fan and high limit setting ranges. Hello I have a York furnace and I’m getting a code for limit switch open. Power goes through the limit switch to the ignition control board. Definition of a Fan Limit Switch. sequencers, controls, fan and limit controls, thermostats, thermal cutouts. Eligible for Free Shipping. When the furnace is warm enough upon start up to begin heating the home, (about 20 degrees above room temperature) it will tell the fan to come on. The switch is mounted on the furnace air plenum and is easily recognized because of its wiring once the access panel has been removed. The Emerson 5D51-90 universal replacement fan and limit control is perfect for applications with narrow space limitations. Limit Switch Functions. Backed by a One Year Manufacturer Warranty. SWT01280 Trane High Temp. Turn off electrical power to the main power source. The average consumer can both locate and set the fan limit control switch with ease. The older furnaces are much easier for a DIY to trouble shoot. The limit switch shuts off the burner when the temperature exceeds a preset temperature. If the air temperature indicates a fire, the fan is shut down. It shows the elements of the circuit as streamlined forms, and also the power as well as signal links in between the devices. A Furnace can have a combination of two switches: Fan Limit Control Switch and High Limit Switch. Burner assembly lower center. The williams wall heater keeps tripping the limit switch at the top of the furnace and the vent is clear. Kenmore 5D51-90 Furnace Fan Control and Limit Switch Genuine Original Equipment Manufacturer (OEM) Part. Johnstone Supply is a leading wholesale distributor for multiple leading brands of HVAC/R equipment, parts and supplies available and in-stock at local branches. The vent limit switch, which is also referred to as a fan limit switch and is typically shaped like a small metal disc, prevents damage to your furnace by shutting the. Detecting and diagnosing an open limit switch can be. To protect the temperature sensing element, steady the faceplate dial while moving the sliding pointers on its face. High Limit Switch - Heating Repairs Holly Springs NC Frank Alexander. When the furnace is warm enough upon start up to begin heating the home, (about 20 degrees above room temperature) it will tell the fan to come on. Your one stop outlet for furnace and air conditioner parts with Free Priority Shipping. Air Ease Furnace Parts and heating parts. I have a Caddy wood/electric furnace. Comfort-Aire Heat Controller Rheem Ruud Weatherking Century Furnace Fan Control. This is an OEM replacement for old Honeywell part #s L4064B1469 L4064B1683 & L4064B2640. How a furnace limit switch works: A limit switch is a safety switch with normally closed contacts; the connections open at the designed maximum temperature and interrupt the power supply to the heater. Blower will run for 4 min. Top Rated Plus. It should have two wires. BC Furnace & Air Conditioning Ltd. Genuine Original Equipment Manufacturer (OEM) parts! This fan control and limit switch (part number F560) is for furnaces. The warm air furnace fan limit switch (shown above and below on a gas fired warm air furnace) is a control which determines when the hot air furnace blower assembly turns on and off. Tell the fan when to come on. 1-702-990-0683. L4064B,W, and R models have a manual fan switch that overrides the fan control to keep the fan running continuously. Turn off electrical power to the main power source. At the end of this article you'll find a complete list of air handler or fan limit control switch diagnosis and repair articles. Add To Cart. 13P95 Fan & Limit Control Switch. If you still have the manual which came with your furnace, refer to their troubleshooting section for additional help. it worked good most of last winter. Your furnace fan limit switch is basically a control system that determines when the furnace blower assembly should turn on and off. Great prices & free shipping on orders over USD50!. By knowing what the most common furnace problems are, you can take proactive measures to prevent them. NOTE: Original part no longer available so you will receive a replacement assembly built in our shop. The system uses a "temperature probe" to detect temperature changes inside the heat exchanger (see image below) and turns your blower on and off in response. Here you will find replacement parts for your furnace. Your fan limit switch is the control that turns your furnace blower on and off. By regularly replacing the filter and evaporator pads, you can improve air quality and reduce the amount of strain put on the furnace motor. The fan air stream causes the Sail switch to close as the blower gets near full speed. Usually held in by two 1/4" or 5/16" hex screws. 99 shipping. FAST 'N FREE. I have 3 wires going to it, but none match the wiring diagrams of the directions. Element is 13″ deep. Number 42001 was noted on part. Teledyne Laars E2103200 Manual Reset Limit Switch 250F. We recently had a question come in from our Furnace FAQ page, where the visitor wanted to know more about gas furnace short cycles, and what it meant to him with his brand new furnace in his home. Many fan limit switches have a push-pull switch for continuous or automatic operation. Locate the furnace fan limit switch. Buy Williams Furnace Parts at Reliable Parts today! Factory authorized appliance parts distributor. You can take the limit off and take it to a supplier to match it up and replace it yourself. Fan and Limit Controls Fan/Limit Control w/ 125°F on. Download the catalog (US) / (CAN). the three settings from low to high are 80F. Backed by a One Year Manufacturer Warranty. Carrier Bryant Payne Honeywell Universal Honeywell Furnace 8" Combo Fan Limit Switch L4064 A 1347 L4064A1347. There are two types of permissions in My DOR: Administrator and Account Manager. Page 3 SETTING THE CONTROL (CONT. It could be too much fuel input. The B13709-08 sometimes has part numbers: B13709-08S, B1370908S or B1370908. is used when the Supply Air Fan Operating Mode Schedule values are never 0 and the fan operates continuously. The blower/fan is controlled by a Honeywell fan limit switch. Available in a variety of fan and high limit setting ranges. The warm air furnace fan limit switch (shown above and below on a gas fired warm air furnace) is a control which determines when the hot air furnace blower assembly turns on and off. What the Limit Switch Does. Also known as part number 5000-269-502 and 266186. I've turned the on-off switch off at the heater but when the switch is turned back on the problem persists. If the limit switches are closed, the the warmup time for the HSI begins. Limit Switch; SWT01635 Trane High Temp Limit Switch ; SWT01652 Trane Furnace limit switch; SWT01729 Trane High Temperature Plenum Thermostat; Hot Surface Igniters. Snap disk fan switch. Honeywell L4064 Fan Limit Switch for Gas Furnace 8" probe A2030. 7" Fan Controls; 3" Fan Controls; Hydronic (Hot Water) Heating Parts. The blower was on, the vent motor also turned on. bought a different limit again. net when you are in need of replacement wood furnace parts, includin. Buy Home & Garden online and read professional reviews on Furnace fan limit switch Home Hardware. 47-22860-01 Comfort-Aire Limit Switch. Bad low limit switch,fan switch. In this episode of Repair and Replace, Vance shows how to replace the high limit switch in a gas furnace. Furnace Parts > Furnace Switches. The circuit which directly runs through this switch controls the burners to the furnace. Fan Control, Snap Disc - 120F - Always trust Wood-Furnaces. Download the catalog (US) / (CAN). Order From HVACPartsShop Today!. Tell the fan when to come on. If the high limit switch was bad, the furnace should not fire. Your furnace fan limit switch is basically a control system that determines when the furnace blower assembly should turn on and off. - 7" Fan Switch - 7" Limit Switch - 8" Fan & Limit - 9" Fan & Limits - Adjustable Fan Thermo-Disc - Adjustable Limit Thermo-Disc - Automatic Reset Limit Roll Out - Floor Furnace Limit Switch - Manual Reset Limit 2 Wire - Manual Reset Limit Roll Out - Mobile Home Limit & Fan - Special Limit Switches - Thermo Limit Fuse Link - Thermo-Disc Fan 2. Furnace Fan Manual Override Switch Wiring - Help! - Doityourself for Honeywell Fan Limit Switch Wiring Diagram by admin From the thousand images on the net regarding honeywell fan limit switch wiring diagram, picks the best selections along with best image resolution exclusively for you, and this photos is usually among graphics choices inside our ideal photographs gallery in relation to. Get the lowest prices on Lennox 73W20 Switches everyday at FurnacePartSource. The fan & limit switch are on the same board marked TMAC 1165 I have not been able to locate a replacement.