Thanks Paul. BTW you know AC pretty good. What is the going rate for evac of Freon and is it need to replace my pressure relief valve next to the compressor manifold that i expect is bad? Everytime i turn on AC, freon gushes out the valve?
Sorry it took me a long time to respond. I didn't even know that there was another question on this thread.
A "ballpark" rate for recovery of R134a is $50.00. If you have installed a sealer in the system, the recovery machine will detect it and you will be charged a seperate fee for the pre-filter. Remember that if 2.5 lbs of refrigerant are removed, you can"t put it all back in. So, there will be an additional charge for the additional refrigerant. After repair the system will also have to be evacuated (vacuum). This will vary with the amount of time that the receiver/drier was exposed to the atmosphere. Again a "ballpark" of $40.00. If both services are done at the same time a total may be quite less than the individual services.
The relief valve may be doing it's job correctly if there is a blockage on the high side of the system.