Gas furnace fan doesn't turn on and makes hissing sound


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Old 01-26-14, 05:27 PM
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Gas furnace fan doesn't turn on and makes hissing sound

Hi - My furnace fan will work for a period of time, but at some point will stop turning on with the system. There will be a hissing sound coming from the furnace. I flip the fan switch off, wait a second, then turn it back on and the furnace will turn on. Any ideas of what the issue could be?
 
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Old 01-26-14, 05:42 PM
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Welcome to the forums.

Which fan does this...... the little one up top, the draft inducer or the big one in the bottom ?

Don't ever recall hearing a hissing in the past. Furnace noises are very hard to diagnose.

A make and model of the furnace would probably be helpful.
 
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Old 01-26-14, 05:43 PM
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It could be a capacitor, fan motor, or fan relay. It's really hard to tell without being there or at least being able to hear it. If you have a volt meter & know how to use it, you can check to see if the fan is getting power.
 
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Old 01-26-14, 06:45 PM
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Thank you. I have no idea what fan it is, I just flip the switch on the front of the furnace. The heat exchanger was fixed in 2011, before I owned the house.......could this be the issue? It sounds like a hiss or maybe just a stream of air, but the fan doesn't turn on.
 
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Old 01-27-14, 09:24 PM
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ej577, can you post a few pictures of the furnace so we have some idea as to what we are trying to help you with?
 
 

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