Leaking ac in cab 1997 Peterbilt 379

Dairy Hauler · Jun 25, 2025

I have a 97 Peterbilt 379 and water is leaking inside my cab from the AC. The drain tube is clear and ac works good. Can anyone point me in the right direction of how I can fix it?

LongHaulTrailer · Jun 25, 2025

Did you open the box that houses the evap coil? There could be a crack and water likes to take the path of least resistance. There could also be something blocking/partially blocking the drain.

Iamoverit · Jun 26, 2025

Triple check the drain tube. It sounds like it's still clogged.

blairandgretchen · Jun 26, 2025

Dairy Hauler said: ↑

I have a 97 Peterbilt 379 and water is leaking inside my cab from the AC. The drain tube is clear and ac works good. Can anyone point me in the right direction of how I can fix it?
Click to expand...

Had to reseal my plastic box - drain was clear, I have ‘95.

They’re a problem.

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