Hi,
I have a 94' with what seems to be a surging problem with the A/C idle. Here what she does;
With the a/c on the compressor will engage and the idle will stay around 600-800 rpms. After running for about 15 sec or so the copressor will disengage and the truck will still call for the idle to increase. Since compressor is not engaged the truck will idle up to 1000 rpms then make its way back down to the 800-900 range. At this point the cycle will start all over again.
The AC temp is cold and seems to be working properly except for the surging idol. I replaced the fan clutch with the blue last summer.
Do you think its the engine coolant shut off switch or the thermister?
The system is charged with 134a
This does not happen with the a/c fan on high.
Thanks,
Check
I have a 94' with what seems to be a surging problem with the A/C idle. Here what she does;
With the a/c on the compressor will engage and the idle will stay around 600-800 rpms. After running for about 15 sec or so the copressor will disengage and the truck will still call for the idle to increase. Since compressor is not engaged the truck will idle up to 1000 rpms then make its way back down to the 800-900 range. At this point the cycle will start all over again.
The AC temp is cold and seems to be working properly except for the surging idol. I replaced the fan clutch with the blue last summer.
Do you think its the engine coolant shut off switch or the thermister?
The system is charged with 134a
This does not happen with the a/c fan on high.
Thanks,
Check
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