Usual Gas Furnace goes on off on coldest night of year question

Old 01-11-14, 08:41 AM
cfclay's Avatar
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Usual Gas Furnace goes on off on coldest night of year question

I just moved in a house where the a gas furnace in Arkansas weather is 6 years old. I woke up to find the room temperature about 65 when heat was set on 67. It just got colder all day- down to 59 the next over night. I read some tips on the web- turn off thermostat, reset breaker to furnace, make a call for heat- may solve problem.. replace batteries in thermostat.. done it all.

Called home warranty company- they came and looked at and performed some cycles/tests for an hour and determined "nothing appeared wrong."

So now I'm calling them again and compiling all observations:
-yesterday heat never appeared to come on- we heard what we thought was furnace trying to ignite... seems like a 10 second cycle, humming noise...then nothing. How often this happens- I can't pin down
-Last night went to bed and turned the fan on and heat (pretty sure heat wasn't working- but thought I would see how cold room temperature got. Turns out the fan has turned off in the middle of the night. Now I can't even get my fan on.

Maybe the problem was with the fan all along- I just thought he would have picked that up.

My question is: can someone point me to all checks I need to make so that I can give the technician all observations/conditions other than "heat doesn't come on".

Thanks to all!

Last edited by cfclay; 01-11-14 at 08:42 AM. Reason: mistake in title
Old 01-11-14, 09:34 AM
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You haven't given us any information on your furnace....... like make and model..... which can be found if you remove the front service cover where the burners are. There would be an ID tag on either side.

There is no "usual" problem with a furnace.
There would be a lot fewer problems if furnaces were serviced every year.

Was the heat working just before the repair company got there ?
You can check the blower fan by putting thermostat to FAN ON and see what happens.

Most modern furnaces have a control board that has a red blinking LED on it. Many times you can see it by looking thru a sight glass in the blower door. That LED blinks a code number that corresponds to a fault.

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