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Burner kicks on, blower does not, when blower is turned on manually only cool air comes out

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I would check out the afc automatic fan control it brings the fan on ,on temp rise and off on temp fall

Posted on Sep 29, 2010

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1 Answer

Fan cycles after burner stops


When your furnace has reached desired temperature the burners will turn off but your fan will continue to blow for a couple of minutes Or in other words until it cools your fan limit switch. This switcheck is what tells your blower motor when to kick on and when to kick off.

Mar 06, 2015 | Heating & Cooling

2 Answers

1999 Goodman down draft natural gas furnace. It starts as normal, the burners fire and it warms up, but the blower doesn't start, after a couple minutes the burners shut down and the blower immediently...


IT SOUNDS LIKE THE FAN CYCLE RELAY OR BOARD IS NOT MAKING THE FAN COME ON WHEN IT SHOULD THE BURNER SHUTS OFF PROBABLY BECAUSE IT REACHES THE HIGH LIMIT.

Feb 03, 2015 | Heating & Cooling

1 Answer

I started my forced air furnace yesterday and it worked fine. Today the burner kicks on when the thermostat calls for it, but this morning the burner kicks on, but the fan won't start.


Hello there,
If the burner kicks on but the fan is not starting, then it simply means there is a problem with the blower motor. The problem most likely is that the motor is dusty and need to be cleaned out.
Once the motor sis cleaned out, have it greased and installed back and ensure the wiring is intact, then turn on the furnace and the fan will start to foll. If that does not solve the problem, then it means there is a problem with the blower motor and it meeds to be replaced.
All the best Elect_Comp

Sep 16, 2011 | Heating & Cooling

1 Answer

The furnace will start and run for 5 mins and kick off. Then the burners will not reignite after that. However, after everything cools down (about a half and hour later) it will restart and run for...


Hello, sounds Like the Furnace is tuning off due to the limit switch or rollout switch opening. A limit switch and rollout switch are safety swtiches that will turn off the furnace if it gets to hot or the burners flames are abnormal. Usually a weak blower motor, dirty blower wheel , dirty burners or even a crack in the heat exchanger can cause this problem. Best bet is to call a hvac technician and have them check it out.

Sep 14, 2011 | Heating & Cooling

1 Answer

My furnace the burners light and come on and heat up the unit. But the fan never kicks on and blows. The fan itself works because I can turn it on manually so I know it's not that. The trouble code...


The manual selection on the thermostat bypasses the fan relay. When in Auto, the fan relay turns on the blower. You are probably looking at replacing the circuit board. As far as the three blinks, on the reverse side of the front panel there is a wiring diagram and error code chart. It will give you a starting point where to look for a problem. The three blinks could indicate an open limit because the blower is not operating. Keep the blower on manual and let the furnace run normally until you can figure out what the problem is.

Feb 23, 2011 | Intertherm Heating & Cooling

1 Answer

The furnace will kick on and the burners will keep going out the process will continue unless i shut the power to the furnace off for five minutes then cut it back onit will run good but the problem will...


check your air filter, a very dirty filter will cause the unit to over heat "180'" The burners turn off the unit cools itself with the blower and then relights.

Jan 24, 2011 | Goodman Heating & Cooling

2 Answers

I have a new home 1 yr and when the furnace kicks in, I am assuming the fan it makes a noise but as soon as the heat starts the noise is gone, could this be the furnace blower


Check by turning the unit off and turn the fan to on. Do you hear the noise now? The noise your hearing could be coming from your combustion fan assembly instead. Newer furnaces have a in-shot burner and are nosier than the old style of heater.

Jan 04, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

Flame drops when blower comes on suspect bad heat exchanger


Are you saying you lose the pilot flame or the main burner flame? A cracked heat exchanger will cause a "venturi effect" when the blower cycles on. This effect will cause blower to interfere with combustion air and **** out the pilot, and cause lifting of the main burner flames (also add oxygen to the flames changing their color).

Some of your newer style furnaces will kick the hi limit when they have a crack in the exchanger dropping the flame and bringing the blower on.

If you are pretty confident of a crack I would suggest a water test.....After the furnace has cooled. determine which way will most easily access the heat exchanger through the top (under the a-coil) from the "plenium". or from below by removing the blower with it's housing.

once you have determined your approach get a bug sprayer and put water in it. With the heat exchanger cool, use the wand of the sprayer to liberally spray the top of the exchanger. If there is a crack the water will find its way into it. Take a flashlight and look into the bottom of each burner slot, if you see water, you have a crack, shut it down and replace it.

Dec 26, 2009 | Coleman Propane Forced Air Heater...

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