CMF 80 PG

Questions about repairs and parts for Nordyne furnaces, air conditioners and heat pumps for manufactured homes including Intertherm, Mac and Miller brands. Click here for Nordyne parts.

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VCFD
Posts: 22
Joined: Mon Apr 09, 2007 9:25 am
Location: Old Forge, NY

It's been awhile since I've been on the site but I could use some help.
I have a Miller CMF 80 PG furnace. 2 weeks ago, when I opened the house, the furnace was not running. The T-stat was set at 55 but the temp in the house was so low the digital readout only said "low" (luckily no pipes were frozen). I turned it off, and after a few seconds turned it back on. I heard the T-stat click and then the furnace started normally and worked fine for 2 days. This weekend the same thing happened. I was able to once again able to get it running by turning the power off and on again.

The T-stat was new last year but I replaced it anyway and the same thing happened. Any ideas on what would cause the furnace not to start when the T-stat sends the signal?
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Robert
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Posts: 6413
Joined: Wed Feb 28, 2007 12:07 am
Location: Tennessee

Hi,

Are you sure that t-stat is in fact sending signal to furnace when it fails to start ?

Have you tested white t-stat wire at furnace to ground for 24vac ?



Thanks,
Robert
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