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M1Mb 070A

Posted: Sat Dec 19, 2009 2:36 pm
by irmolars
Sorry I posted this in the wrong area previously.

I have a problem with this furnace.
It will run fine for a while, then out of the blue its starts to get cool in the house.
When i check the furnace the power is off. I turn the power switch off and back on then it will run fine and then out off the blue it will do it again. Any suggestions?

Re: M1Mb 070A

Posted: Sat Dec 19, 2009 7:46 pm
by Robert
Hi,

Check transformer for 120vac in and 24vac out, t-stat for 24vac to furnace and breakers for 120vac to transformer and furnace.


Thanks,
Robert