BAC Forum

General Boards => Technical Support => Topic started by: Michael Castro on June 22, 2021, 08:29:18 PM

Title: Roof A/C units not blowing cold 2005 Marquis
Post by: Michael Castro 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

 

Title: Re: Roof A/C units not blowing cold 2005 Marquis
Post by: Eric Maclean 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

Title: Re: Roof A/C units not blowing cold 2005 Marquis
Post by: Eric Maclean 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