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Old 10-15-2021, 07:32 PM   #1
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Dometic heat pump won't heat or cool

I have a 2004 dometic heat pump 59136.331. Yesterday, it quit cooling or heating. The compressor is working so I am assuming the reversing valve is stuck. I was thinking about replacing the reversing valve coil before replacing the whole unit.

Anyone know where to order a coil?


Also, ant idea what unit will be a direct replacement?
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Old 10-15-2021, 09:24 PM   #2
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Lack of refrigerant?
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Old 10-16-2021, 11:00 AM   #3
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Agree with the above^^. I'd be more inclined to think it is a loss of refrigerant rather than the reversing valve. The fact the a/c neither cools nor heats points to lack of refrigerant.


A stuck reversing valve will result in the a/c remaining in whichever mode it was in when the valve failed. Your system neither heats nor cools, which is a function of refrigerants flowing through the system, and that is not happening, apparently.



You are considering replacing the reversing valve "coil," which I assume means the solenoid. That is not difficult, but your symptoms are not consistent with a stuck reversing valve.

BTW, a 17 year old a/c on the roof of an RV has generally served its time.
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Old 10-19-2021, 05:45 AM   #4
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Thankyou for the response. I was thinking it was a graph issue but hoping for an easier fix until I finish this trip.
Anyone know of a dometic brisk air II will be a direct replacement?
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Old 10-19-2021, 09:05 AM   #5
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Meant coolant issue not a graph.
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