Rooftop ac repair

mike brez wrote:

dougrainer wrote:
If you are talking 1998, then Freon 22 is the Freon to use. BUT, most units use only 16 to 20 ozs of Freon. HOW did you determine the correct Freon fill capacity? There are only 2 ways to fill a Roof RV AC
1. Dial a Charge
2. Temp corrected amp draw AT the compressor
Regardless, your Compressor is not caused by your fill. You have a bad compressor. YES(or NO) you will not find a replacement Compressor for a RV Roof AC unit. They have not made replacement compressors for more than 30 years as it was cheaper to replace the upper unit complete than pay to replace the compressor. Doug

PS, since you are handy brazing the lines, LEAVING the Line taps on is foolish. You only install Line Taps to safely(EPA) drain any possible Freon still in the system and then braze the Line Tap pin holes and braze in standard copper Schrader valves. Line Taps WILL LEAK. Eventually.

I agree 100% on the line tap. I weighed the freon on a scale.
I may just replace both as's. You have seen and worked on more of ac's than anyone on the forum. What brand would you recommend for replacement.

IMO, You only have 2 choices. RVP(Coleman) and Dometic. Odds are, your old tstat system may not work with the NEW style Dometics. Your 1998 was right on the change over from the LED wall tstat system to the original 4 button wall LCD CCC Dometic control system. IF you have the 4 button Dometic CCC system with the telephone type COM cable, I would replace both roof top units and purchase a 10 button Dometic CCC wall tstat. It is plug and play. I would go with 15k Penguin units as they have the 10 button control boards already installed on the Unit. Doug