air con problems

[ratfink]

when i turn on the ac the pump cycles in and out (1-2 secs) is this normal?
the temp in cal is around 61 and with it set at the lowest temp it does this!
is there a temp control module problem or is it just too cold for it to stay on or is it something else?
thanking u in advance
russ

 

[Robertwav1]

Just when it's on 61? Does it cycle on a hot day? First thing I'd check would be the charge.

 

[ratfink]

i set it at the lowest temp the car appears to have a charge There is pressure in the system

 

[bradfordsvettes]

sounds like low charge or a bad cycling switch steve

 

[Robertwav1]

You say it appears to have a charge....you really have to put gauges on it to tell. In cold weather it will cycle due to insufficient pressures. I wouldn't run it in the cold anyway (even if it does have an ambient switch). Liquid migrates throughout the system on a cold day, the pump is a gas pump not liquid pump and it could hurt or destroy the compressor. Wait for a hot day and put gauges on it....that's your best bet.

 

[HPG]

If the car is just sitting with the hood up, this is normal. If you have a way to check the outlet air temp while running. It would be in the low 50's or 40's on a cool day. If not, it may be low charge. If it has 134, you can but a inexpensive gauge from any auto store and check the charge. Good luck. Wish it were 61 here, last week the high was in the low 20's

 

[MrHeat]

HEY ratfink my 86 started doing the same thing,i had the system checked and pressure was good,when i put my fan speed up past 6 "climate control" it seems to run steady i posted here and someone said it could be the a/c controller mod,i bought a chilton repair manual to find out where it is located but of course they do not address the a/c system because of the potential risk of death or injury.Let me know how you make out