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Old 10-10-2010, 12:25 AM   #1
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HELP!: Heat Pump Heating not working


I am diagnosing a heat pump. The customer said it worked great during the cooling season, but when she turned the thermostat to heating, the thermostat started smoking. I took off the cover to the thermostat, jumpered the red with yellow, ac worked great, then jumpered red with white, and started sparking alot so i couldnt keep it that way because i felt the transformer and it was getting very hot. Please help! Any ideas??

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Old 10-10-2010, 06:18 AM   #2
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HELP!: Heat Pump Heating not working


You make it sound like your a tech.

Get your meter out and check the circuits, and read the wiring diagram.

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Old 10-10-2010, 09:58 AM   #3
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HELP!: Heat Pump Heating not working


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Originally Posted by beenthere View Post
You make it sound like your a tech.

Get your meter out and check the circuits, and read the wiring diagram.
Maybe he's a land lord, and came here for advice, and isn't handy with a meter yet..
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Old 10-10-2010, 10:19 AM   #4
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HELP!: Heat Pump Heating not working


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Originally Posted by zootjeff View Post
Maybe he's a land lord, and came here for advice, and isn't handy with a meter yet..
maybe.

But then, he shouldn't be calling his tenant/resident a customer. Since his tenant/resident is not responsible for the repair.

And help is easier to give. When you know if some is a tech or not. And how good they are with tools and meters.
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Old 10-10-2010, 12:50 PM   #5
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HELP!: Heat Pump Heating not working


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Originally Posted by beenthere View Post
maybe.

But then, he shouldn't be calling his tenant/resident a customer. Since his tenant/resident is not responsible for the repair.

And help is easier to give. When you know if some is a tech or not. And how good they are with tools and meters.
Touche.

They probably wired the 24v hot to the wrong terminal. I'd bet whatever the problem is shorting out the 24 volts when the thermostat tries to pull a control line to ground. Check the reversing valve and the call for heat, make sure the 24v hot isn't strapped to something it's not suppose to be.

This could be useful:
http://www.alpinehomeair.com/related/diagrams_15.pdf

But we really have nothing to go on here with no model numbers, brands, details, etc.
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