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Old 11-09-2010, 06:51 PM   #1
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Carrier heat pump wont stop!


Split 10 ton carrier. The Mayor got an electrician to replace the t-stats in town hall. Ive replace 4 75va trans. and rewired all stats, BUT this carrier 38AQ012500 will not shut down when the t-stat is satisfied. The indoor blower stops but the condenser keeps running. Take the reversing wire off and it stops, put it back on and it starts!! any suggestions?

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Old 11-09-2010, 06:53 PM   #2
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Carrier heat pump wont stop!


Sounds like someone didn't wire it correctly

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Old 11-09-2010, 07:03 PM   #3
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Carrier heat pump wont stop!


Duh ya think? Ive wasted several hours trying to figure this one out. Defrost timer is the old style but nothing stuck. Its got to be a stuck relay somewhere but WHERE?
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Old 11-09-2010, 07:21 PM   #4
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Carrier heat pump wont stop!


How many thermostats are controlling this 1 unit?

Is it a zoned unit?
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Old 11-09-2010, 07:26 PM   #5
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Carrier heat pump wont stop!


1 t-stat Honeywell 6000 electronic. O energizing W1 on condenser.
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Old 11-09-2010, 07:26 PM   #6
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Carrier heat pump wont stop!


Not zoned
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Old 11-09-2010, 07:48 PM   #7
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Carrier heat pump wont stop!


Ok. You threw me of. When you said you rewired all thermostats.

What terminals does the outdoor unit have. Carrier RTUs(newer ones) don't use an O terminal anymore. But split units do.
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Old 11-09-2010, 08:38 PM   #8
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Carrier heat pump wont stop!


They screwed up more than this one. TB is top to bottom R, Y1, Y2, W1, A2, X, C, P
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Old 11-09-2010, 08:51 PM   #9
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Carrier heat pump wont stop!


Just connect the W1 of the stat to the W1 of the outdoor unit. Don't use the O.
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Old 11-09-2010, 09:30 PM   #10
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Carrier heat pump wont stop!


Which de energizes the reversing valve.... Thank You!!
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Old 11-09-2010, 09:37 PM   #11
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Carrier heat pump wont stop!


Makes perfect sence!~ I was litterally pulling my hair out with this. Don't know why I did'nt think of that. geesh Thank you-Thank you-Thank you!

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