Blower turns on and then Gas/burner turns on and off intermittently

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Old 01-07-10, 08:17 AM
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Blower turns on and then Gas/burner turns on and off intermittently

I have a Tempstart gas furnace. The blower turns on and shortly after, the gas/burner turns on for about 20 seconds and then shuts off for about 20 seconds. Then it continues this process of going on and off intermittently for a while. During this whole time, the blower does remain on.

I have pulled off what I think it is called the pressure switch hose which connects two parts of the furnace. I straighten this hose and condensation spills out. There is no need to blow it out. I currently have to do this twice a day so that the furnace will work properly. How do I solve this issue?
 
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Old 01-07-10, 09:12 AM
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I take it you have a condensing gas furnace with white PVC pipe for venting?

If so, it sounds like the system to drain away the water condensed out of the combustion gasses is plugged up, allowing water to fill critical parts of the furnace until the pressure switch shut it off.

Usually this is caused by mold or other debris plugging up the drainage system. You need to take the various hoses and parts of the drainage system apart and clean them until you solve the problem.
 
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Old 01-07-10, 09:31 AM
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I do not believe that I have a condensing gas furnace. There is no pvc pipe for venting.

The model and serial number are:
NTG3075FBG1
LO13967262

Thanks for replying!
 
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Old 01-07-10, 02:30 PM
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hose

is the hose the small black round hose? anyhow...what you need to do is to shorten the hose..no sag or loop,trim it with something sharp so it is as straight as possible...try this
 
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Old 01-10-10, 05:48 AM
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The hose is actually orange and it is easily accessable. Is this something that I should still try?
 
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