Boxxer 421 Heat Exchanger

invalid@example.com (Living The Dream), Living The Dream
Tue, 31 Mar 2026 02:10:56 +0000
Carpet Cleaning

I recently purchased a used van and truckmount setup with a Boxxer 421. The previous owner apparently never winterized it, and it looks like a few elbows on the heat exchanger are burst.

I’m fairly confident I can repair the heat exchanger, but this will be my first time digging into a 421. I also own a 427, so I’m somewhat familiar with the Boxxer line, but the 421 is laid out a little differently.

From what I can see, it looks like the blower heat exchanger may need to be dropped out...