Rob123 wrote:Need some help my fielder 2008 has 73000km an the ac only works when I start on mornings an when I driving when I come to a stop the rpm drop to 500 and car vibrate an ac stop blowinging cold also I'm not hearing the high speed fan cut in please help.
make sure your ac is not on cycle.....make sure the compressor engages when u turn on the ac.....u will feel the drop and rise in rpm as well as a soft click noise when the compressor clutch engages
the higher rpm means the faster the compressor will work = colder air
also while moving the condensor is getting a steady supply of air so your ac will be cooler as opposed to standstill and relying on the air from the fan
check the relay or wires for the ac fan
check your timing for the 500 rpm....with ac on the step up unit should kick in and idle around 800-1000
wrt the vibrations check your engine/trans mounts.....