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Old 03-09-2008, 03:39 PM   #1
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furnace won't work

Hi folks,

Hmm...my furnace won't go on, not even the fan. The programmable thermostat has low batteries. Would that cause a problem? There are only 2 wires going to it from the furnace (red and white) connected to RH and W respectively. Should I see any DC voltage on those wires?



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Old 03-09-2008, 03:54 PM   #2
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24V on those 2 wires at the subbase.to run heat...unscrew one and connect it to the other terminal,check the emergency switch and the CB panel..all ON.....you should have the burner ON.can you read voltage check the transformer secondary right off the color wires(yellow/blue)black/white is primary into it 115V


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Old 03-10-2008, 01:40 PM   #3
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As Biggles Said - I Would Jump Out Your R & W Terminal - This Will Bypass Your t-stat. If You Only Have 2 Wires To Your Thermostat There Is No "Fan On" Option, Unless Bypassed On The Circuit Board.
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