QuestionHello,
I've got a question about my 1999 Ford Contour V6 with AC. I noticed the compressor cycling on and off more than it probably should (multiple times per minute at idle). So I decided to recharge it and got one of the R-134a cans with gauge over at an auto shop.
I connected the hose to the low-side service port and measured 25psi with in 75 degree weather, but when the compressor cycled on the gauge jumped up to 35psi. That's expected, right?
No matter what I tried (and I emptied the 13 oz. bottle), the reading never went above 25 psi when the compressor was off. As soon as it cycled on, though, it went up to 45 psi (10 higher than before).
Does any of this sound normal? Have I overcharged my system? Is there any reason why the pressure would stay at 25 psi the entire time?
Sorry for all the questions, but it is just odd because it still cycles a lot, but it now seems to be blowing much colder inside.
Thanks,
Mark
AnswerHi Mark
Compressor cycling switch disconnects at 18 psi and reconnects at 45 psi. Check your pressures with another gauge set to make sure your gauges are good. Usually it will be higher when off then when on. Your pressures at 45 psi should be good. Check your cycling switch make sure it disconnects at 18 psi.
