Air Conditioning

**blueZ71** · 01-25-2009, 02:25 AM

Hey there I've got a 2000 silverado with manual air. I'm concerned about when I turn the knobs because it makes weird noises, almost a clicking sound (it's a hard noise to describe.) Does anyone know what this is indicative of? Thanks.

**bac-n-afect** · 01-25-2009, 04:45 AM

Its really difficult to guess at the problem by the description you left. I was left wondering which knob makes the noise. I would guess it would be the blower knob and if thats the case does it sound as if something small is being kicked around by the fan blades?
Leaves, ear rings, pencial parts, you'd be suprised what you can find in the defrost vent

**Springthing** · 01-25-2009, 11:29 AM

From the description given here, I would agree. Either something in the fan or the fan being a little off center..hitting the sides or something? That's more of a buzzing/whining sound though, huh?

**blueZ71** · 01-26-2009, 09:37 AM

I only hear the sound when I'm turning the knobs and for a few seconds shortly thereafter. It doesn't matter which knob I turn. Almost sounds like a car with a dead battery trying to start. An electrical clicking is the best way I can explain it.

**ukrkoz** · 01-26-2009, 11:58 PM

Originally Posted by blueZ71

I only hear the sound when I'm turning the knobs and for a few seconds shortly thereafter. It doesn't matter which knob I turn. Almost sounds like a car with a dead battery trying to start. An electrical clicking is the best way I can explain it.

sounds like you hearing clutch engaging. that is very normal. turn ac on, pop the hood open, stick your head under the "bonnett" and point the click. it's magnetic clutch, it always clicks when relay kicks in and friction plates engage the compressor.