R Walter

Got out to open a gate and left my 96 Dodge Cummins Automatic in park with the A/C running. I heard a periodic chirping noise coming from, I think, the serpentine belt area about every 30 seconds or so. Later I turned off the A/C and let it idle in park and did not hear the noise.

Any ideas?

Kansascrewcab76

A/C clutch is the culprit. Mine has been chirping also, so I got under and looked the clutch springs are broken and the bearing is very loose.

R Walter

Is the A/C clutch and fan clutch the same or different?

BigDave12768

Birds nest with baby chicks in it. All gone now......

Kansascrewcab76

No, fan clutch is on the fan and is activated by a thermo/bimetallic spring. A/C clutch is mounted to the front of the A/C compressor and is engaged by an electric current engaging electromagnetic coupler

KHoffman

It's probably just the belt. I can't seem to find a belt that doesn't start making noise after 2 months or so.