Let’s talk about AC System Moisture… an AC Fix on a P2 Volvo (2002 V70).
Marlin »
Hi,
I have a V70 T5 2002 with 80000mls on the clock and the air con is not getting cold. I have had the system vacuum leak tested and recharged and there are no leaks in the system.
The compressor cycles on and off about every 10 seconds , when it is on there is a good12v supply to the compressor.I have read on forums about bridging the compressor clutch control relay so tried this .-I wont be doing that again!!
As soon as I bridged the relay with a fusable link the compressor kicked on and stayed on and the air in the car started going ice cold BUT after about 40 seconds of operation Gas was discharged out of the front of the car!!!! untill I switched the ignition off(I assume there is some kind of over pressure valve in the condenser?)
I am beginning to think that there is maybe a blockage in the high pressure side of the system and maybe the drier or the expansion valve is at fault? Has anyone come across this before?
AC System Moisture
jimmy57 »
The fact it dumped gas via the overpressure relief is the first thing to address. The fan should have come on and prevented high side from reaching the 400+ psi pressure where relief opens.
Does the cooling fan work?
The pressures can be checked. The high side is next to RH hood latch and the low side port is directly in front of timing belt cover on the frame rail. The cooling duct for module box may be in the way. Not certain of the layout of the cooling duct on RH drive cars. With engine at high idle (1500 rpm) the low side should be 22-30(1.5-2.0) Bar and high side 150-180 (10-12 Bar) at temps no higher than 85F/30C. The relief opens at just over 400 PSI but compresor shutoff via the pressure sensor should have cut A/C off before that. Your compressor not running any longer than it does could be high pressure related.
When it is cooling normally and car has cooled down the compressor will cycle frequently due to evaporator temp probe sensing and CCM regulation of compressor.
Marlin »
We have now had some days where the temperature is 25-30 degrees celcius and the air con is now ice cold ,so I can only assume that there was moisture in the system which was freezing and by vacuuming the system for 45 minutes before regassing has removed this.(Unfortunatly I was not able to get a scan tool to check the temperature settings but as all seems fine now I wont need to)
Thanks for your help.
Air conditioning not cold in V70
Last Updated on June 24, 2024
4 Comments
Have 2001 S80 with AC problem. Recently with temperature in the 90’s with humidity,see that the AC shuts down after 5 minutes of running,with a warm smell blowing through the vents, what would cause this problem?
i have a 1998 s90 the a/c is charged and the air blows cold for about 15 min. then gets warm and muggy if you turn it off for 5 min and restart it it good for about 15 min the compersor is always running and never stops until you turn it off i am lost