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Posted by Bubba on January 10, 2009, 7:12 pm
wrote:
>> On Sat, 10 Jan 2009 11:51:36 -0800 (PST), adriannefails@gmail.com
>> wrote:
>>>We have a Carrier AC/Heat pump. We have been having a problem with
>>>the 5amp fuse that is located on the inside unit. When the heat or ac
>>>tries to engage it blows the fuse. We have checked the board and
>>>found a spot where two thermostat wires were touching and shorting out
>>>on the outside case cover. Thought we had it resolved and even
>>>cleaned the board on the outside unit. When we turned the heat back
>>>on it turned on great and then when it got to the correct temp inside
>>>it turned off. When it came back on it again blew the fuse. We had
>>>run out of solutions. Anyone have any ideas? The fan runs fine and
>>>the emergency heat also works properly. Help!
>> Check the outdoor heat pump unit. In particular.....look at the wires
>> to the low pressure switch, hight pressure switch and reversing valve.
>> You owe me now.
>> Bubba
>Don't forget the contactor... a shorted coil will blow the fuse too
True but what I was getting at is I have seen a bunch of Carrier heat
pumps that short the wire from the pres sw to the copper. The wire
covering is real cute looking yellow or pink or blue. Its rather stiff
and thin. It doesnt burn through the covering........rather it just
vibrates through. It leaves a whitish mark on the copper where it
shorts. Had one of them do it twice till I finally disconnected the
wires and slid some covering over them (black vinyl humidifier drain
tubing.) Worked like a champ ever since. Just some more Carrier cost
cutting moves.
Bubba
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> the 5amp fuse that is located on the inside unit. When the heat or ac
> tries to engage it blows the fuse. We have checked the board and
> found a spot where two thermostat wires were touching and shorting out
> on the outside case cover. Thought we had it resolved and even
> cleaned the board on the outside unit. When we turned the heat back
> on it turned on great and then when it got to the correct temp inside
> it turned off. When it came back on it again blew the fuse. We had
> run out of solutions. Anyone have any ideas? The fan runs fine and
> the emergency heat also works properly. Help!