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Old 03-21-2011, 08:11 PM   #1
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After installing thermostat, heat/ac will not turn off


I just installed a Honeywell RTH2300 in my home to replace an old mercury unit. It appears to be somewhat working, but the AC/Heat will not shut off. For example, it is set at 75 and the ac keeps running down indefinitely. Also, when the thermostat is switched to the 'off' position, the heating/ac unit keeps running and stays on.

I have read the owners manual and installation guide cover to cover and nothing seems to jump out as something I did wrong. Any help would be appreciated!

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Old 03-21-2011, 08:19 PM   #2
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After installing thermostat, heat/ac will not turn off


post picture. post wire colors and terminals connected to. ensure fan switch is in auto.

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Old 03-21-2011, 08:26 PM   #3
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After installing thermostat, heat/ac will not turn off


Here is the picture. I tried to troubleshoot in both settings (on/auto).

-Michael
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Old 03-21-2011, 08:32 PM   #4
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After installing thermostat, heat/ac will not turn off


cut the wire back. you have way too much copper exposed!
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Old 03-21-2011, 08:34 PM   #5
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After installing thermostat, heat/ac will not turn off


Ok, can do. I was going to, but I wanted to ensure it worked properly first. I didn't want to cut it, later need it, and wish I had not have done so. Is this the problem?
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Old 03-21-2011, 08:40 PM   #6
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After installing thermostat, heat/ac will not turn off


red and green look like they are touching which will bring on the fan 24/7
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Old 03-21-2011, 09:07 PM   #7
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After installing thermostat, heat/ac will not turn off


Alright, the red and green were not touching, but they were close, so I removed the excess copper, cleaned up in there a bit, and hooked everything back in. The unit appears to be functioning normally now. Thanks so much for your help!
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Old 03-21-2011, 09:11 PM   #8
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After installing thermostat, heat/ac will not turn off


no problem. they were probably touching when you attached the thermostat to the sub base.

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