Adding myself A/C anyone is good at this?

dlundblad · Post by **dlundblad** » 22 May 2018, 08:57

Ditch the little gauge that is better suited for R12 and get an actual gauge set with high and low pressure lines before proceeding. If you do need to add something, use a postage scale for accuracy. As mentioned, vacuuming the system is a must too.

Post by **vtl** » 22 May 2018, 18:56

Read evaporator and cabin temperatures, they are available via VIDA/DiCE. It also can show a pressure on high side. That way you can actually see the icing: pressure is high, evap temp is high too. A/C compressor kicks in when evaporator temperature reaches 7 degrees Celsius.

MDK · Post by **MDK** » 24 May 2018, 20:28

Ok guys MDK here... I'm not a "Volvo" expert but I've been an A/C tech since 1983. He's right about the pump down. You need about 29 microns of vacuum in the system before charging with 134A You're looking for about a 20 degree split between indoor air and ambient temperature and looking for the accumulor to be "sweating"the low pressure is your evaporator under the dash ..and the high pressure is your condenser... next to radiator. With clutch engaged you should read about 40 degrees on the low side of the system anything less than that....in my opinion will make the evaporator to freeze up in time....weighing in your freon is best for any car wagon .... whatever hope this helps

Post by **oragex** » 25 May 2018, 06:37

Thanks everyone