Mike, fellow Volvo experts.....
Car is a 98 S70 with manual air conditioning, which today was re-gassed as it was working but not very well with the compressor cycling every 15-20 seconds,- probably upon instructions from the low pressure switch.
470 grammes was sucked out and the correct 750grammes (sticker on wing) was put back in with some dye incase of future leaks. I now have chilly air and the compressor is behaving as it should. (on the move)However, I still have a problem with the radiator fan which is not running with the a/c engaged. It does run on slow speed about every 40 seconds for less than 1 second at a time. This was present before the re-gas- I assumed it was because it was short of gas.
The condensor is obviously roasting hot when the car is stationary- not good.
I havent done any investigation upon, what appears to be the high pressure switch down by the charge point by the PAS pump, which I assume instructs the fan to run.
I am aware that the ECU controls the fan, via the 2 speed relay, and not the HP switch directly, but my Haynes BOL wiring diagrams do not show how the a/c system interacts with the ECU, apart from their being 4 connections from the ''air-cond.'' to the ECU. (possibly 2 from H and L pressure switches??)
Any pointers??
Tim..