Hey guys, here's another question, When I have the defrost on I hear a clunk about every 30 seconds, when I am sitting still. It is pretty loud.

I thought it was my hubs losing vacum and popping in and out.
But it seems only to happen when I have defrost on.

Anyone else? any Ideas?

 

its probably your AC compressor turn your ac on and listen for the sound too normally when defrost is on the compressor kicks on for some reason too

 

Above 40 or 50 degrees, I think, the A/C compressor comes on to dry the air so defrosting or defogging is more effective.

 

Thanks that is what I thought also. It is kind of loud. but oh well

 

Its the a/c compressor coming on.

 

I am so freaked about any noise. With all the trouble with this truck I am hearing every little thing!!

 

I am so freaked about any noise. With all the trouble with this truck I am hearing every little thing!!

But I am not complaining