Issue with air intake on Gas Furnace
#1
10-05-15, 07:49 PM
Join Date: Oct 2015
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Issue with air intake on Gas Furnace
I'm in a bit of a dilemma with my high efficency gas furnace. I just had a local heating and cooling company out to check it out and I don't feel comfortable with how it was left.
The furnace would heat up, ignite and light, but when the blower kicks on, it knocks out the flame. When the repair was here today, we discovered that it works just fine with the cover off and we began to wonder if the air intake was blocked. He cut into the PVC air intake pipe and we tried to snake it a few times and I even ran some water through it to try and flush out anything that may have been blocking it. We found no blockage of any kind.
When he hooked up the air intake pipe again, the flame went out. If we left it unhooked and allowed it to intake air from the basement, it worked fine and did not go out. Has anyone ever experienced anything like this or seen this before? I don't feel comfortable leaving the air intake unhooked as a solution to heat my house but we could not find a blockage anywhere preventing air from coming through. I'm not sure where to go next as another option to fix it correctly.
The furnace would heat up, ignite and light, but when the blower kicks on, it knocks out the flame. When the repair was here today, we discovered that it works just fine with the cover off and we began to wonder if the air intake was blocked. He cut into the PVC air intake pipe and we tried to snake it a few times and I even ran some water through it to try and flush out anything that may have been blocking it. We found no blockage of any kind.
When he hooked up the air intake pipe again, the flame went out. If we left it unhooked and allowed it to intake air from the basement, it worked fine and did not go out. Has anyone ever experienced anything like this or seen this before? I don't feel comfortable leaving the air intake unhooked as a solution to heat my house but we could not find a blockage anywhere preventing air from coming through. I'm not sure where to go next as another option to fix it correctly.
#3
10-06-15, 10:42 AM
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The pipe itself is a 4" pipe if I were to guess. It is big enough to fit my hand into. It does stretch probably 20 feet across the floor underneath the living room to extend outside. I've lived there 3 years but this is an older house built in the 40's. The furnace is probably close to 10 years old.
#4
10-06-15, 11:09 AM
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Welcome to the forums.
We're going to need the make and model number of your furnace.
It sounds like an issue in the flue system and it's running on the edge of the pressure switch setting causing the flame to go out.
There should be a sight glass in the blower door where you can look in and see a blinking red LED. This will be blinking a trouble code. Obtain code before opening blower door. The codes are on the back of the blower door.
We're going to need the make and model number of your furnace.
It sounds like an issue in the flue system and it's running on the edge of the pressure switch setting causing the flame to go out.
There should be a sight glass in the blower door where you can look in and see a blinking red LED. This will be blinking a trouble code. Obtain code before opening blower door. The codes are on the back of the blower door.
#5
10-06-15, 04:59 PM
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I do not see any flashing lights on the inside to indicate any codes or patterns.
My furnace is a Rheem WeatherKing manufactured in 10/2003.
My furnace is a Rheem WeatherKing manufactured in 10/2003.
#6
10-06-15, 06:52 PM
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