Anyone having this problem?

[Hypothrml]

Just notice this today when I was having a smoke outside of my car, my car was idling and it made a clicking noise. Every 10-15 sec. it would click and idle at at higher speed and then right away it clicks back to normal idling rate. Anyone having this same problem?

[bluntman]

Was your heater on? I\'ve noticed the same sort of behaviour. I think it as something to do with the HVAC system in the car, even with the AC off it will still make that sort of noise.

[Hypothrml]

Yeah, I was warming up the car.

[bluntman]

That\'s it! It\'s a weird HVAC system.