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Old 10-26-2006, 02:35 PM   #1
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Is anyone familiar with the working of the gas furnace? I am trying to figure out if I have cut off some the intake air for the blower. I have put foam sealant around the bottom on the side closest to the front {outside}. This is to keep mice out of the MH. I have sealed all the opening I can find in the cabinets and door pockets.

I turned my heat on the other night and it did not work as it did when I used it last year. You hear a blower come on first, then the gas comes on and finally the heat comes on. I know this is normal but then after a short while the gas shuts off and the warm air keeps blowing but then in a minute the gas comes back on. This is the part I feel is not normal and I think it is not blowing out the reginsters as it did before.
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Old 10-26-2006, 02:35 PM   #2
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Is anyone familiar with the working of the gas furnace? I am trying to figure out if I have cut off some the intake air for the blower. I have put foam sealant around the bottom on the side closest to the front {outside}. This is to keep mice out of the MH. I have sealed all the opening I can find in the cabinets and door pockets.

I turned my heat on the other night and it did not work as it did when I used it last year. You hear a blower come on first, then the gas comes on and finally the heat comes on. I know this is normal but then after a short while the gas shuts off and the warm air keeps blowing but then in a minute the gas comes back on. This is the part I feel is not normal and I think it is not blowing out the reginsters as it did before.
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Old 10-27-2006, 12:45 AM   #3
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It does sound like you have restricted the return air and by doing so the furnace is now operating on the high limit switch because the temperatures of the heat exchanger are too high. THe furnace must be able to take air into the box from the vents on its side and move it across the heat exchanger and blow out the duct work effficiently to prevent it from getting too hot and shuting down prematurely on the high limit. If you will cut away some of the foam insulation from the furnace until it operates normally, you should be fine. Good luck and let us know how you do.
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Old 10-27-2006, 05:59 AM   #4
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Thanks Mike and Amy. I thought that might be the problem. I did stop the mice problem but created another one.
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Old 10-27-2006, 06:34 AM   #5
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I don't see how mice could be coming in through the furnace. The furnace air intake for the furnace and the heat chamber are not connected to the heat ducts. this configuration makes for safe use of the furnace as combustion is sealed from the interior air. The heat is transfered through a heat exchanger and then blown through the coach. Remember mice can get in through holes about the size of a dime. I would look for missing caulk or opennings that are even that small.
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