Gas Furnace cuts in and out at lower temperature settings

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Posts: 4
Joined: Thu Sep 03, 2009 11:16 am
Location: Canada

Thu Oct 15, 2009 1:28 pm

Hi All,
I am hoping someone has some suggestions as to why my 1994 natural gas furnace cuts in and out when I have it at a lower temperature setting overnight. I usually set the thermostat at just below 60 degrees, and I always have to get up and turn the darn thing right off, as it cycles at these lower temps. No problem when I move the setting up to between 67 and 70. I have replaced the relays and that did not solve the mystery. Plus, the furnace gets it's yearly maintenance from a professional, and even he cannot come up with a solution. Anyone else have these kind of issues? any thoughts as to what may be the problem? Any help will be appreciated.

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Posts: 6413
Joined: Wed Feb 28, 2007 12:07 am
Location: Tennessee

Mon Oct 19, 2009 1:31 am


Hard to say without being there to test it. I can say that cooler in home temps do play havoc on a lot of furnaces .

I would have it thoroughly tested and if nothing found, either set t-stat higher or maybe call the manufacturer for info on it.

Some people are Humbly Grateful, while some are Grumbly Hateful.................... Which one are you ?

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Posts: 606
Joined: Mon Dec 03, 2007 2:18 pm
Location: Florida Panhandle

Tue Oct 20, 2009 11:50 am

Can you set the temperature swing on the t-stat?