Author Topic: Carrier Heat pump OAT 25HPA  (Read 4433 times)

Offline chrissymustang

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Carrier Heat pump OAT 25HPA
« on: February 01, 2011, 11:46:37 AM »
I have a Carrier heat pump,about 3 yrs old, with a progammable Carrier control panel model# A07049.

The problem is the OAT display on the control panel is way off.  Its about 30 F outside yet control panel report 73.  The OAT does varies throughout the day but has been incorrect for a couple weeks now.

Any ideas or thoughts?

Offline jumptrout51

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Re: Carrier Heat pump OAT
« Reply #1 on: February 01, 2011, 01:46:19 PM »
Are you certain no one pushed some buttons and you are reading indoor temps?
Take a Kid fishing.

Offline chrissymustang

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Re: Carrier Heat pump OAT
« Reply #2 on: February 01, 2011, 05:34:05 PM »
I don't believe so.  The actual inside temp. and the reading two different readings on the control box don't match up.  I also have a "weather station" verify the information.  My programmable control box displays two temp constantly--indoor and outdoor.  It appears the indoor reading is correct, but not the outdoor.  I guess I should track the outdoor readings which might help the troubleshooting.

Offline Repair-man

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Re: Carrier Heat pump OAT
« Reply #3 on: February 02, 2011, 03:02:51 PM »
There is a thermister attached to the control board in the outside unit which projects the readings to your OAT. Either the sensor or the board can be bad.
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Offline chrissymustang

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Re: Carrier Heat pump OAT
« Reply #4 on: February 02, 2011, 05:21:06 PM »
Okay, guess I'll take a look and see if its thermsister

 

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