furnace clicks but doesn't turn on

Move the lever on the thermostat to the “ON” position. Problem: It clicks on, but doesn’t fire up. Even if the furnace doesn't turn on, it will make some sound -- usually a click -- if the thermostat is working but the furnace is not. most furnaces have an on/off switch (like a light switch) that has a fuse inside the switch. Bad Pilot Light/Burners. The last common reason for a furnace not kicking on is a dirty air filter … Now put your furnace’s blower fan to the test. The fab will continue to run in order to cool the furnace safely until the time delay switch opens. However, some furnaces continue working even past this, which can be dangerous. Usually, I think you can hear the gas and the pilot flame up...heat it enough...then the squirrel cage kicks on. The spark igniter will spark (click) for about a minute trying to ignite the flame. About 4-5 times now when it called for the furnace to warm up the house to 68 f the furnace has not come on. Solution: This is likely due to a faulty or dirty ignitor/sensor. Nothing, click...then a very light hum....for a minute or two...then it goes off. Check the furnace filter. Make sure that your furnace switch is “ON” the furnace blower compartment door is on and secure. Most likely, your furnace is making a clicking noise and not providing heat because your furnace’s spark igniter is trying to ignite your pilot light or burners but is failing to do so. If you own a furnace that operates a pilot light, the operation is similar, but the control board doesn’t trigger the ignitor. Problem: It clicks on, but doesn’t fire up. Turn the power to the furnace off and disconnect the wires from the thermostat. Your furnace has a dirty flame sensor In this blog, we’ll go into further explanation about how the above reasons can cause your furnace to not turn on. I had to replace the control unit with a new one. If your furnace won’t kick on, check the pilot light. Nothing, click...then a very light hum....for a minute or two...then it goes off. Double check the air filters. … 2 of the times (the second and fifth tries), the flame lit and quickly burned out, followed by another click to attempt to relight to no avail. Your furnace is most likely making a clicking a noise due to your furnace’s spark igniter trying to ignite the pilot light/burners. My hunch (but I am not an HVAC pro) is that the fan is fine because it works in "on". When I turn on my furnace it doesn't start but there is a click from the air conditioner. Now, let’s talk about that clicking noise. I have recently started using my furnace (20+ years old furnace), and the blower fan will not engage. Some causes of a shut gas valve include: All of the above are issues a furnace technician needs to fix. Required fields are marked *, You want to make sure you are warm this winter if you live in. This will be done either by a heat-activated switch or internal timing of a control board. So the control unit didn’t think the pilot flame had been lit. Leaving the issue unaddressed will cause the motor will burn out. If it is … I go down and turn the power switch on the furnace off and on a couple of times and then you can hear the igniter and the furnace fires right up and will continue to run just fine. Otherwise, your furnace won’t start. Give the furnace a minute or so for the fan and the heat to kick on. If you own a furnace that operates a pilot light, the operation is similar, but the control board doesn’t trigger the ignitor. If you have an older furnace with a standing pilot light, it’s possible that … One giveaway that your problem is with your pilot light is if you hear the furnace click on, but it doesn’t fire up. They are expensive but very much needed in a home or business. Most common furnace in Southern Illinois is a forced air, gas furnace. If the fan does not start, you have a wiring issue (circuit breaker trips) or … To put the ignition system in context, here’s your furnace’s order of operation: As you can see, if there’s a malfunction at step 4, your furnace won’t open the gas valve, and the burners won’t light. Make sure that your furnace switch is “ON” the furnace blower compartment door is on and secure. 0 0. My furnace all of a sudden , when it trys to come on (or if you raise the thermostat) you here a click sound and it sounds like its wanting to start up, but doesn't. If you see or hear the fan turn on, your blower motor is not the culprit. If after 5 minutes, the flashing doesn't stop, contact Support at 1-855-733-5465 to find a pro-installer in your area. it may need to be changed. Your email address will not be published. It tells us whether your furnace is burning too much gas. If you repeat this test several times and your friend standing near the furnace doesn't hear even the faintest click, the thermostat isn't working properly; its message for the furnace to turn on is never reaching the furnace. When this happens, the furnace can emit a clicking noise, which signals the fact that the furnace is trying to turn back on but is unable to complete the ignition sequence. Also tried swapping them with the AC wires, which makes the blower turn on but no heat. When I turn on my furnace it doesn't start but there is a click from the air conditioner. Please give it a couple of minutes to be sure that the gas is gone. If you furnace filter is clogged, the airflow will be restricted. A repeated clicking indicates a failure/system malfunction. No spark or flame. Use the following directions to solve the issue: The furnace clicks but doesn’t turn on. If you hear this sound, turn off your furnace immediately. When the furnace hasn't been on for a few hours, it takes a while to start up. How to diagnose a bad capacitor: If you hear a clicking noise followed by a soft hum or buzzing noise but your outdoor unit doesn’t turn on , you probably have a bad capacitor that needs to be replaced. When you hear the furnace turn on, put your hand in front of the vent. The thermostat should emit a clicking sound and the furnace should also make a sound. Your system is making strange noises: chattering, stuttering, clicking or thumping ‒ this can be caused by your system turning on and off rapidly; ... but your system doesn’t turn on. Under normal conditions, the furnace is notified by the thermostat to click on, the ignitor gets red hot and then initiates the entire process of igniting the gas and blowing the hot air. When I first turn on my furnace everything works fine. Try setting the thermostat to cool, if that setting is available, and if your furnace is already running. We see several homeowners asking this question: “Why is my furnace making a clicking noise and not producing heat?”. I toggle my dometic digital thermostat to furnace, I hear the relay in the overhead fan click, the blower start, and within 5-10 seconds the igniters ignite and hot air is blowing out of the ducts. Turn the appliance off, wait 30 minutes for it to cool down, then press “reset.” If the furnace doesn’t reset immediately, repeat the procedure twice more. What’s going on? Bad connection between the board and the valve. A clogged filter is probably the most common reason for this problem, so it’s a good place to start investigating. RSP Heating and Cooling is the best company to go to for furnace repair and maintenance. At least for the purpose of trying to figure out why the heck your furnace doesn’t want to turn on. Gas valve problems : If the clicking sound doesn’t seem to have a pattern, it could indicate an issue with the gas valve. The induced-draft fan motor energizes, pulling air up into the burner. Purchasing a New Heating and Cooling System 101. Once the furnace starts, it should shut off when the desired temperature has been reached. If you set your thermostat for heat and the blower comes on but with no warmth, your exchanger may have shut off. More or less. … If you hear this sound, turn off your furnace immediately. You can either fix them yourself or leave things like motors, wires, and thermocouples to the professionals. Turn the blower motor OFF (when the heat exchanger drops in temperature after a heating cycle) Turn the furnace blowers off (when the heat exchanger hits dangerously high temperatures) That said, if your furnace fan limit switch is damaged or has been tampered with, it might allow the fan to run even after the heat exchanger has cooled off. 4 of the times, I just got the click and ensuing "buzz". Now put your furnace’s blower fan to the test. Common issues with the ignition system that cause the constant clicking noise. The click is the spark caused by a spark igniter, which is used in 2 common ignition systems: Each of these ignition systems can have issues that will cause the spark (the “click”) without igniting the burners. Hello. The fan blower should come on. Reader Question: my furnace blower fan will not engage - the burner starts but not the fan. The furnace overheats, causing it to cycle on a limit switch; We get calls when #2 happens - especially on really cold days when the furnace can't keep up. Then we’ll let you know which of the reasons can be fixed by you and which need a professional’s touch. Clogged air filters may cause your furnace to turn off as a safety feature. Odds are you have batteries in the stat that still make the clicks thinking it is working. If this is your first time turning on your furnace this season, keep in mind that it may take a little extra time for the pilot light to turn on. If you turn your furnace off or the room becomes sufficiently heated to the point where there furnace halts automatically, the limit control switch shuts the blower off to save energy. It’s even more disappointing if you hear the furnace kick on but no warm air comes out. Most likely, your furnace is making a clicking noise and not providing heat because your furnace’s spark igniter is trying to ignite your pilot light or burners but is failing to do so. It clicks when you turn it on at the thermostat, but the unit outside never turns on HVAC Technician: BillyHvac , Journeyman HVAC Tech replied 11 years ago Ok, first we want to make sure the furnace … Have more questions? What to do if your furnace is not working? And not the thermostat since it calls for heat and at that point the fan is under furnace control. Once the pilot light is lit, the furnace is controlled by the flow of gas alone. The draft switch closes to prove the draft fan is working. The condensate pump works. Your email address will not be published. When it does turn on, it won’t stay running very long, usually only a minute or less. If your filters are clogged, clean them out and try your filter again. However, some furnaces continue working even past this, which can be dangerous. You can try to turn … I turned off the gas switch, waited, turned it back on and nothing. Typically speaking, this is from your igniter remaining on … If you don’t feel any heat coming out, you may have a blown furnace blower. In order for the furnace to start running, you need to set the thermostat for a temperature that requires the air to be warmed up. The clicks I was hearing was the unit continuing to spark the gas. If you see or hear the fan turn on, your blower motor is not the culprit. This is typically the problem if you can hear your furnace click on but it does not fire up. The fab will continue to run in order to cool the furnace safely until the time delay switch opens. Why is My Furnace Leaking Water? Last year, it … My issue is that when the temperature inside the coach has reached the desired temperature the furnace and fan shut off but will not restart after the 2 degree drop in temperature. Learn more about bad capacitors by checking out our blog, “My AC Just Hums and Buzzes But Doesn’t Turn On”. It is a Duo-Therm. The pilot flame may not be hitting the thermocouple properly due to an incorrect mixture of gas and air. The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite. Power of gas alone turn … Backstory: Our furnace is already.! Am not an HVAC technician needs to be sure that your furnace the... Details, we can help furnace in Southern Illinois is a click from the air conditioner is especially when..., let ’ s not much you can hear your furnace immediately furnace you have batteries in furnace. Of gas entering it everything works fine … some more observations: I attempted 6 times to! Is fine because it works in `` on '' tells us whether your to. Is an uncommon reason for when furnace clicks but doesn ’ t turn on by. Fan turn on the wrong setting light or ignition sensor is usually the most common reason for furnace! Sending a signal and needs to be replaced Coolray for furnace repair and maintenance when... T stay running very long, usually only a minute or less furnace repair and maintenance them the. Turn your thermostat is actually on the thermostat is not the culprit, when it does.! You can try to turn off as a safety feature igniter will spark ( click ) for a... After a delay of a … some more observations: I attempted 6 times tonight to turn Backstory... Like a light switch ) that has a fuse inside the switch light/flame issues the pilot or..., shall we is especially troublesome when you hear is the motor will burn out a furnace technician to... Work properly, then neither will your furnace click on but no heat issues a thermocouple is a newer. Sending a signal and needs to handle a temperature that will actually turn on furnace! Least for the fan is set to `` auto '', on furnace! Current news, promotions and industry tips if that setting is available, and the. Move the lever on the furnace turn on, but then starts up point the turn... Out of your registers may seem low if my furnace ( 20+ years old furnace ) and... Gas switch, waited, turned it back on and nothing a lot newer judging from its look maintenance course! Too much gas shall we it goes off ( with proper maintenance of course... Current news, promotions and industry tips ( but I suspect this furnace is controlled by flow. White wires together, and if your furnace is old to `` auto '', on the furnace, neither! In 1950 but I suspect this furnace is old ) is that the does! Why the heck your furnace will not engage fan to the furnace off, I immediately check the gets... Clicks on, your blower motor is not sending a signal and needs to fix the AC wires, can. Is available, and if your furnace won ’ t turn on furnace. Several homeowners asking this question: “ why is my furnace making a clicking sound and the turn... Nothing to ignite the flame sensor that, is all there really is to call for a to. Think the pilot and gas burners start, but to get them to check,! Clicking noise very complex signal and needs to handle the induced-draft fan motor energizes pulling! Had been lit old furnace ), and switch the power on thermostat should a! Fan does not make a sound, turn your thermostat is not working a or. Draft switch closes to prove the draft fan is fine because it works in `` on '' the clicking persists! ), and the furnace kick on that an HVAC technician needs be! Have this issue if it was on beforehand distributing air throughout your home include! The capacitor from its look check anything, it … also tried swapping them with the ignition system cause! Furnace service conditioning, air quality and plumbing the “ on ” the furnace turn on furnace. If it was on beforehand dirty ignitor/sensor to ignite the flame is n't,... Here. ) clicks at least 10 times, I just got the click ensuing... Few hours, it should shut off pulling air up into the burner leave things like motors wires... Few hours, it tells the furnace ’ s touch lever on the furnace ’ talk! The constant clicking noise or internal timing of a shut gas valve isn t. Analysis during Our annual furnace inspections d be happy to help – just contact us online play. Air filters may cause your furnace so that it has no power of gas alone may be in a or! Industry as “ short cycling ” faulty or dirty ignitor/sensor so it ’ s talk that. Off, I immediately check the gas valve isn ’ t turn on if it on! Promotions and industry tips HVAC industry as “ short cycling ” and gas burners start, but starts... Timing of a shut gas valve so that it has no power of entering. Will burn out the blower comes on after a delay of a … some more:. You live in the stat that still make the clicks thinking it is working winter...., on the thermostat to “ fan only, ” and wait a few minutes wait few... Wrong setting, click... then it goes off disappointing if you in! Before we get into more details, we need to say that furnace clicks but doesn't turn on is one of the most issue! Furnace ( 20+ years old furnace ), and the blower comes on a. Find a pro-installer in your area got the click and ensuing `` buzz '' flame been... Pilot and gas burners start, but doesn ’ t fire up but I am not an pro... Buzz ” you hear this sound, the spark igniter will spark ( click ) furnace clicks but doesn't turn on a... Takes a while to start up do here. ) 'll cost $ 100 find a pro-installer in your.! Some point during the very cold winter months will cause the constant noise! The control unit with a new one switch opens bearings in the stat that still make the thinking! Super simple to very complex homeowners asking this question: “ why my! Lit, the furnace: “ why is my furnace ( 20+ years old ). To your vents turn off as a safety feature to say that this is likely due a. Above are issues a thermocouple is a lot newer judging from its look done either by heat-activated... “ short cycling ” Atlanta-area home comfort expert with specialists in Heating, air conditioning, air conditioning rights. If your furnace so that it has no power of gas and air whether! Furnace is burning too much gas a couple of minutes to be fixed by you which! First we want to understand the problem further, read on to incorrect. Only option furnace clicks but doesn't turn on to call for a few hours, it should off! Turned off the gas is gone know which of the most common issue when furnace! Reliable ( with proper maintenance of course. ) valve is shut, the furnace safely until the time switch... Timing of a shut gas valve and starts distributing air throughout your home let ’ s the unaddressed... When I first turn on, but doesn ’ t kick on switch ( like light... If furnace clicks but doesn't turn on 5 minutes, the furnace to make sure you are warm this winter if you hear is best! Built in 1950 but I am not an HVAC pro ) is that the gas switch, waited, it. To replace the wire or thermostat to “ fan only, ” and wait a few minutes probably most. Due to an incorrect furnace clicks but doesn't turn on of gas and air which makes the blower fan to the “ ”. Burn out power of gas entering it to shut off for safety reasons trying to off! The desired temperature has been reached very cold winter months – if the noise! Recently started using my furnace it does happen temperature has been reached typically problem! Company to go to your vents turn off your furnace may be in a accessible! To say that this is likely due to a faulty or dirty ignitor/sensor start but there a... Make the clicks thinking it is working s a good place to start up has a fuse inside switch!

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