Gas Furnace, No Heat, Can Smell Gas In The Crawlspace - HVAC - DIY Chatroom Home Improvement Forum

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Old 12-19-2009, 07:14 PM   #1
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Gas Furnace, no heat, can smell gas in the crawlspace

Unfortunately, I don't know the model because it was taped over at some point.

It's a gas furnace with electric ignition (no pilot). I removed the programmable thermostat from the wall for repainting, then the house was without electricity for approx 2 months. New tenants moved in and the heat did not work. Replaced batteries in the thermostat and the heat started working.

Couple days later, no heat again. Replaced the air filter, which was very dirty. Here's the current symptoms:

* Thermostat 'Off', Fan 'Auto' -- nothing
* Thermostat 'Off', Fan 'On' -- the system blows air out the vents
* Thermostat 'Heat', Fan 'Auto' -- i can hear noise as if the furnace turns on, but no air flow to the vents
* Thermostat 'Heat', Fan 'On' -- same noise as above, plus cold air blowing

In the crawlspace, I can smell natural gas. So it seems like there is no ignition going on. I'm planning on calling a pro tomorrow, just posting here in the off chance that there is something I could try first.


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Old 12-19-2009, 08:59 PM   #2
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Since your smelling gas in the crawlspace.

Might be better to have a tech look at it. One spark at the wrong time. And well, you don't want to have that happen.

Shut gas valve off to furnace, until tech gets there.


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Old 12-21-2009, 07:37 AM   #3
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simple fix, needed new ignition.
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