York gas furnace problem - Won't stay on.

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rbf3999
Posts: 1
Joined: Sat Dec 05, 2009 3:39 am

Sat Dec 05, 2009 3:44 am

My gas furnace comes on when I cycle the switch of the thermostat from "off" to "auto". The heat runs for a while, but does NOT get up to the temperature it was set, and then shuts off until the next time I do the above mentioned. If I leave it on "auto" it does not turn on again at all even though the desired temp is supposed to be 69. I have replaced my thermostat, had same problem, and replaced my theromostat again, same problem. It seems to me it must be the thermostat, but logic is telling me I cannot have three bad ones at the same time. What else should I check?


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

Mon Dec 07, 2009 2:15 am

Hi,

Would need to start at t-stat and using wiring diagram, test the circuit components and wiring to find break in circuit not allowing furnace to operate as designed.


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

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