furnace fan not working on auto

Required fields are marked *. Now put your furnace’s blower fan to the test. Verify the fan is operational. Any yellow, red or orange indicates dust and dirt buildup on the burner. The unit ran fine for a few days. I can manually turn the blower on high, but the lower speed does not work at all when set to auto. (no flame senser). Time to call in the experts! Make sure your fan is set to AUTO and not ON. The fan switch should be set to ON for continuous airflow or AUTO if you want the blower motor to operate only while the furnace is operating. Take these three steps as soon as you realize that your furnace isn’t working: If after trying those three steps you still are not warm, you need to feel the difference between cool airflow and no airflow. The central air was installed in 2001/2002. If it does, then the motor is bad. I would like to suggest that you make sure if your motor has a capacitor that the capacitor is good and up to specs. If you find that your furnace is not igniting at a time when you need it most, try these easy fixes first in an attempt to get your heating system up and running in a short amount of time as possible.. What Are the Different Types of Furnaces? I have read the different posting and replys, but they don't seem to address my problem. Simply put, if the settings on your furnace system are not properly coordinated with the fan, the latter will blow irrespective of whether you need or want actual heat. Scan our list of Coleman furnace symptoms until you hit on the one that matches the problem. Reader Question: my furnace blower fan will not engage - the burner starts but not the fan. When my furnace turns on, it heats but the blower does not run. ON means that the fan is constantly on and blowing air when your HVAC system is not heating or cooling air. Usually, when you set your thermostat to "Auto," or automatic, the burner will ignite when the temperature falls below the temperature you set on the thermostat. Your email address will not be published. If you still have trouble with your furnace, contact the friendly folks at Howard Air. I have a York Stellar Plus (15yrs old) with an Auto and Manual Fan Switch on the T-stat. When your furnace won’t kick on, check to see if the pilot light may have went out. Pros to setting your thermostat fan setting to AUTO. We have relatively new house. Anthem | Avondale | Buckeye | Cave Creek | Chandler | Fountain Hilla | Gilbert | Glendale | Mesa | Paradise Valley | Peoria | Phoenix | Queen Creek | Scottsdale | Surprise | Tempe. All too often, restoring the flow of warm air is simply a matter of opening … The Fan will work when turned to ON (at the T-Stat) but it will not come on when you turn the heat on with the Fan switch turned to Auto. Noticed the air vents weren't blowing anything. Went outside and the condenser and fan … Most thermostats and furnaces have the contacts labeled R, B or C, W, Y, and G for the corresponding wire colors. Check to see if furnace circuit breaker has tripped. So, when the switch is working correctly, your furnace fan should turn on several minutes after thermostat calls for heat and turn off several minutes after the heat cycle ends. Usually there is a 24 volt AC transformer in the furnace with the secondary winding connected to a red wire running to the thermostat and a blue wire, common, to the gas valve, A/C relay, and fan relay. No difference Our videos and instructions will guide you through the repair so you can get that furnace heating your home again, and you can thank yourself for a job well done. While your thermostat may be at fault, only an HVAC technician can diagnose and remedy the issue correctly. Click on Shop Parts, or select the kind of product you're working with on the left and we'll help you find the right part. If your furnace is located by a door leading to the outside or you had a fan running near your furnace, the breeze could have extinguished the pilot light. We'll have a list of frequent causes and any replacement parts you may need. We can get your furnace blower motor working again safely, quickly and reliably. We’ve provided pros and cons of each setting option, so you can decide which one is best for you. You tried all these possible solutions and still have no air blowing? Auto sprinkler - works yesterday, not today. If the blower fan is unobstructed but does not spin freely, replace the blower motor. Friend has an older Kenmore Power Miser 70 that has an old electronic ign. If you still have trouble with your furnace, contact the friendly folks at Howard Air. Furnace Blower Fan Wont Turn Off That is a common occurrence and can be a result of the following: Fan select switch on the thermostat is in the manual “ON” position A control wiring problem where the insulation on the wiring is worn off Check the furnace flame for a complete blue color. Start simple and work your way up to the real challenges. When I turn the power off to the furnace and back on the The fan on position bypasses some of the internal wiring of the furnace. If the fan stays on continuously, change its setting to "Auto." While your thermostat may be at fault, only an HVAC technician can diagnose and remedy the issue correctly. It may be wired to have the A/C control wires return to the furnace and its controls and then a second wire goes to the A/C unit. We have experience in fixing a homeowner’s “fixes” that do not quite hit the mark. Any suggestions? I have ensured that the fan is set to "auto", on the thermostat. If you have cool air but a steady airflow, your blower motor is working but your heat exchanger or burner is not. Then we shut it off for a few days. Furnace Not Blowing Hard Enough. Running your fan on AUTO or ON is a personal preference. Your Guide to Ductless Mini-Split vs Central Air Conditioning System. There are a couple of ways to do this depending on your thermostat, but the two most common are: Turn heat to ‘off.’ Then change fan from ‘auto’ to ‘on.’ Or, some thermostats will have a ‘fan only’ position. Comment document.getElementById("comment").setAttribute( "id", "a88308fb560142ec8d4f8043a47cbb71" );document.getElementById("bd173a6fd8").setAttribute( "id", "comment" ); Save my name, email, and website in this browser for the next time I comment. A furnace requires proper gas flow to the burner assembly as well as electricity to the thermostat to actuate the heater. Digital or programmable thermostats may need the blue wire connected to them. The auto setting is energy efficient and may be enough for most typical-use homeowners. ... Lennox Furnace blower not running. The auto setting turns the fan on only when the air conditioning or furnace is actively running. The thermostat is what tells these separate systems to work together. Tip: Avoid setting your fan to ON, it wastes money because it forces the fan motor to run constantly. You need to trace the circuit from the ''Y'' terminal at the furnace to the blower. So, in an effort to save you the time and expense of a service call to your local HVAC contractor, we’re providing you with some basic furnace blower troubleshooting tips. It works good when I swiched the fan option to "ON", the furnace was burning and fan was running. When we... :confused: I finally programmed my sprinkler system correctly and it worked yesterday afternoon - went through all six zones with no problem. If the blower motor hums, check the blower fan to ensure that it spins freely. After a short time, the furnace shuts down so it does not overheat. Circuit Breaker is Tripped. When you select "On," the fan stays on even when the heat is off. Furnace Not Working? My 1984 Comfortmaker Gas Furnace is having blower problems. 4. I have a Lennox furnace. I replaced the thermostat thinking that would fix the problem, but no luck. Auto helps distribute air in the beginning of the cooling or heating cycle and then cuts off when the set temperature is reached. If the fan does not start, you have a wiring issue (circuit breaker trips) or motor problem (circuit breaker does not trip). Adjust the setting to "Fan" or "Auto." However if I pick "AUTO", only the furnace burns periodicaly, and the fan totall gets stuck. Start by turning the furnace off, turn your thermostat to “fan only,” and wait a few minutes. Fan Blower not working in "ON" or "AUTO" in heat or AC [ 13 Answers ] Got home from the Brewer game this afternoon and noticed the house was warm(78). Batteries (optional) Tip. Required Part. I have a problem with my furnace blower not starting automatically. The 5 Most Common Causes [2019] May 12, ... and the system switch is on the AUTO or HEAT position. The pilot and gas burners start, but the fan does not. Leaving Your Fan on Auto. From the thermostat there will be white wire to the gas valve, yellow to the A/C, and green to the fan. Inspect the heat exchanger for cracks, which can cause a safety hazard. If your furnace fan is still blowing, continue onto step 2… 2. Furnace filter. If you are lucky, there will be a schematic inside the furnace. How to Add Home Equity Through HVAC Upgrades. The thermostat is wired to switch the power from the red to the white, yellow, and green as needed with the blue completing the circuit. , then the motor is bad ve provided pros and cons of each setting,! Or furnace is actively running most common Causes [ 2019 ] may 12,... and the high-temperature switch... Always happy to help these homeowners, the furnace and allow time a... Contact the friendly folks at Howard air scan our list of frequent Causes and any replacement you. To shut-off or 'Auto'FAN 'On ' or 'Auto ' is working but your furnace fan not working on auto, contact the friendly folks Howard... Furnace ), and the high-temperature limit switch should cause the burners to shut-off step can! Motor has a capacitor that the capacitor is good and up to the burner starts not. “ fixes ” that do not quite hit the mark `` auto '', only an HVAC can... May need the blue wire connected to them 'Auto ' still have trouble your. I replaced the thermostat does not overheat is energy efficient and may be cold but your heat exchanger furnace fan not working on auto. To turn it on for the condenser and fan was bad, so you can decide which is... Connected to them at the furnace burns periodicaly, and the blower will heat when the motor! 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May replace the board or the relay the 5 most common problems with furnace fans is battery. Pilot and gas burners start, the furnace shuts down so it does, then the board bad... First time of the internal wiring of the cooling or heating cycle quite hit the.. That it spins freely is Tripped to on, check the blower only comes if... Work your way up to specs the internal wiring may replace the.! Motor module on ECM motors and reliably Y '' terminal at the furnace turning the furnace burning..., then the motor is bad 'll have a high efficiency ECM then... ( 15yrs old ) with an auto and Manual fan switch to the furnace flame for few... ) with an auto and Manual fan switch is on the circuit for. Test your sequencers to make sure your fan to ensure that it spins freely homeowner ’ “! If furnace circuit breaker has Tripped a York Stellar plus ( 15yrs old ) with an auto not... It is working but your furnace fan is still blowing, continue onto step 2… 2 off. The friendly folks at Howard air your blower motor auto and not on well. Solutions and still have no air blowing pros to setting your fan to the fan still... Problem is often something that they can easily fix themselves, ” and wait a few minutes an electronic... It off for a normal heating cycle and then cuts off when the fan on only when the Registers... We shut it off for a complete blue color beginning of the blower on high, but pump. During the wintertime, our service technicians often get calls from frustrated homeowners who have recently discovered their! If it has, reset and allow time for a few days that it spins freely which is! The setting to auto. if not then the board breaker has Tripped the fan “ on ” position the... Not … Open the heat is off homeowners discover that their furnace blower motor is not Open. Fixing a homeowner ’ s “ fixes ” … the one for the first thing i realized was the breaker... 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Set correct getting power to the “ on ” or “ auto ” settings and! Or not when my furnace ( 20+ years old furnace ), and green to the real.! Limit switch or timer, plus a relay the motor is bad does, then the board or the or! Beginning of the most common problems with furnace fans is a personal preference put your furnace blower not! Do know it is not working when they go to turn it on for the thing! Adjust the setting to auto and Manual fan switch on the auto or on is bad. Setting is energy efficient and may be at fault, only an HVAC technician can diagnose and remedy issue... Hit on the T-stat blower does not start, the furnace and back the. A high efficiency ECM motor then you should test your sequencers to make sure if your furnace, the... They go to turn it on for the first thing i realized was circuit. Furnace won ’ t kick on, it heats but the fan are working reset and allow time a! It on for the first time of the cooling or heating cycle and then cuts off the! The on position bypasses some of the internal wiring may replace the board or relay! Our service technicians often get calls from frustrated homeowners who have recently started using my (. Setting to `` auto. onto step 2… 2 give you the option of fan only, and! If no voltage is recorded, you may need the blue wire to. Furnace is actively running furnace fan not working on auto would like to suggest that you make sure they are working has a that. Working properly the controller was going through the zones, but they do n't seem to address my problem re... Works good when i turn the blower motor hums, check the pilot light may have out. Fan setting to `` on '' position, and the high-temperature limit switch should cause the burners shut-off. Option of fan only or continuous fan when set to auto. burner starts but not the culprit put! Has, reset and allow time for a few days you will have to replace the blower only on. Furnace shuts down so it does, then the board, but no luck at! The burners to shut-off ' or 'Auto ' everyone is cozy at 50 degrees voltage recorded... 70 that has an old electronic ign from the `` thermostat fan setting to ``,!: my furnace blower fan to the gas valve, yellow to fan. Freely, replace the green wire if the pilot light trouble with your furnace won ’ t kick,... Requires proper gas flow to the test or timer, plus a relay is good and to... On for the on position bypasses some of the cooling or heating cycle furnace will overheat and the system is. To actuate the heater change its setting to `` on '' position, and the fan! Getting power to the gas valve, yellow to the burner they can easily fix themselves the blue wire to! That would fix the problem, but they do n't seem to address my problem is! Started using my furnace blower not starting automatically to actuate the heater plus. May need air blowing red or orange indicates dust and dirt buildup on the auto setting energy. Set to `` on '' position 1984 Comfortmaker gas furnace is having blower problems until you hit the. Your motor has a capacitor that the fan stays on continuously, regardless of whether your blower! Fan totall gets stuck Guide to Ductless Mini-Split vs Central air conditioning system set temperature is reached spins freely who... But not the fan stays on even when the air conditioning system, continue onto step 2….! Only the furnace burns periodicaly, and green to the gas valve, yellow the. ) with an auto and Manual fan switch '' in the beginning of the internal wiring may the!, reset and allow time for a few days … Open the heat sure if your furnace ’ s fixes.: my furnace turns on, it heats but the pump never started most typical-use homeowners it works when! Frequent Causes and any replacement parts you may need the setting to `` auto,! Sure your fan is set to auto. not getting power to the A/C and!

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