Author Topic: Roof A/C units not blowing cold 2005 Marquis  (Read 708 times)

Michael Castro

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Roof A/C units not blowing cold 2005 Marquis
« on: June 22, 2021, 08:29:18 PM »
I am trying to proceed in fixing the cooling issues with my roof A/C units.  The heat pumps work well.   Is there any way to refill the freon?

I have 3 units.  Zone 1 (the front) is blowing lukewarm cool are.  Zone (2) is better but not the best. Zone (3) is also not that cold.


Any suggestions?

Thanks

 

Eric Maclean

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Re: Roof A/C units not blowing cold 2005 Marquis
« Reply #1 on: June 22, 2021, 09:17:08 PM »
Micheal
I might be wrong but if the heat pump function of these A/C units is making good heat then they must have sufficient refrigerant to do the job.
It might be low refrigerant but it could also be a problem with reversing valves or some another part of the units the best way to find out would to be have an HVAC tech do a full pressure test .
But before having them looked at I'd lift all the covers and check the condenser and evaporator for dirt and proper air flow.

Hope this helps
Eric
1997 Patriot Yorktown
3126-B
2009 Chevy HHR
Roadmaster falcon tow bar
Demco Air Force one tow brake.

Eric Maclean

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  • Posts: 683
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  • Karen and I would like to wish you all happy trail
Re: Roof A/C units not blowing cold 2005 Marquis
« Reply #2 on: June 22, 2021, 09:26:49 PM »
Micheal
I guess I forgot to answer your question .
In order to add refrigerant or even test the pressures an HVAC tech will install clamp on (saddle valve / fittings) to the high and low side tubes allow them to access the system .

https://www.grainger.ca/en/product/p/WWG52VN82?cm_mmc=PPC:+Google+PLA&ef_id=Cj0KCQjwlMaGBhD3ARIsAPvWd6iARjtNJEzRczOPdAD6W3QevyYAre4kHIVVPXXZIZ6UuxHtg2gipHUaApoREALw_wcB:G:s&s_kwcid=AL!3645!3!483556496832!!!g!545759021711!&gclid=Cj0KCQjwlMaGBhD3ARIsAPvWd6iARjtNJEzRczOPdAD6W3QevyYAre4kHIVVPXXZIZ6UuxHtg2gipHUaApoREALw_wcB

Hope that answers the question
Eric
1997 Patriot Yorktown
3126-B
2009 Chevy HHR
Roadmaster falcon tow bar
Demco Air Force one tow brake.