I live near the colorado river, AZ. Its been 121 degrees. Theres a clunk sound coming from under dash or right side engine area when driving and turning on the A/C. Whats up? Also how much humidity is needed for the A/C to drain. The humidity here is very low.

 

On my 05 sxt, on a hot day with the A/C on full blast, the condensation drips down onto the accessory and alternator belts, causing a weird sound coming from the front right side engine. Might check to see if that's a similar issue.

 

But your A/c works fine? The compressor clutch will make a clunk or a pop noise when it engages generally that can be heard inside the passenger compartment, completely normal.

 

OK. Thank you for the reply.