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Old 04-13-2013, 10:42 PM   #1
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thermostat works backwards

just installed new thermostat, because could not get my outside a/c fan to kick on. After i installed new thermostat when i turn on heat mode my outside a/c unit comes on and blows cold air. I need help to figure out what i did wrong. i installed thermostat wires the same as on the old thermostat. Thanks for any and all help


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Old 04-13-2013, 10:53 PM   #2
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thermostat works backwards

Sounds like you just got a wire or two hooked up wrong somewhere (common error). Sometimes new stat terminal maybe a little different than old stat. Can you please post a pic of the thermostat terminal and control board terminal on hvac unit? Also name and model of stat. Thanks.


Last edited by jmon; 04-13-2013 at 11:00 PM.
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Old 04-13-2013, 10:59 PM   #3
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thermostat works backwards

Did you try switching the wires. It's probably just your new thermostat is backwards from the old one
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Old 04-14-2013, 04:44 AM   #4
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thermostat works backwards

if your just typical R,G,Y1,W1 flip the W and Y wires shut furnace toggle off on that 115 just incase you spark one of them....
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