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My heater works fine all day until the temp dips into the low 30's at night. At that point it continues to try and kick on, but shuts off just before starting to blow hot air. After trying a few times it completely stops. It got down to 62 in my house, yet the theremostat was set at 67 and the heat would not come on.

Submitted: 312 days and 16 hours ago.

Category: HVAC

Value: $15

Status: CLOSED

Posted by hvacmrfixit 312 days and 14 hours ago.

Info Request

If you have pvc pipes venting your furnace outside check them for cob or spider webs , the cool damp air settles on the web and resticts airflow through it and will lock out the furnace Run a garden hose down in as far as you can and see if you pull some web out

312 days and 14 hours ago.

Reply

If this is the case, why would the heater work much of the time but only give me problems when it is very cold?

Posted by hvacmrfixit 312 days and 14 hours ago.

Info Request

More condensation do to longer heater operation. also check you condensate drain one that goes to floor drain(blow through it make sure its clear) for blockages will have the same effect on furnace operation

312 days and 14 hours ago.

Reply

OK. I'm trying to "accept" but can't locate the "accept key". Where is it?

Accepted Answer

Thanks

Accepts:
Expert:	hvacmrfixit
Pos. Feedback:	100.0 %
Answered:	1/14/2009

HVAC Technician

30 years of commercial and residential heating and cooling installations and troubleshooting

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Question

Info Request

If you have pvc pipes venting your furnace outside check them for cob or spider webs , the cool damp air settles on the web and resticts airflow through it and will lock out the furnace Run a garden hose down in as far as you can and see if you pull some web out

Reply

If this is the case, why would the heater work much of the time but only give me problems when it is very cold?

Info Request

More condensation do to longer heater operation. also check you condensate drain one that goes to floor drain(blow through it make sure its clear) for blockages will have the same effect on furnace operation

Reply

OK. I'm trying to "accept" but can't locate the "accept key". Where is it?

Accepted Answer

Thanks

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