bsmd2005

Hi guys,
Quick question, noticed that when the HVAC is on, any setting, I get a slight cyclical surge in idle. I hear a clutch kicking in and off at the A/C, around 15 second intervals. Low pressure in the A/C maybe?

Roler

Your e-fan tends to cycle on and off when you have A/C on (and defroster I think, but I've never have used that setting here, in the 5 years I own mine haha).
This is normal operation.

Coach

Roler is correct, however if you have a low refrigerant charge the compressor/fan will cycle more often. If it's happening every 15 seconds I would think that your original thought of low pressure is correct.

weebur

My '97 FSM says that cycling of the AC compressor is normal if it cycles less than 10 times per minute (every six seconds).

bsmd2005

Thanks, much appreciated! I will check on the A/C pressure, just to make sure.

prcherokee

You should know that the refrigerant pressure is affected by ambient temperature.