Recommended Replacement for a Dometic Duo Therm 620426.321 AC Unit

Published 09/09/2023

Question:

I have a Duo ThermDometic? Model# 620426.321 ac unit that I believe the relay board 3106996.030 has gone out. Is there a replacement part for it? If not, which economical 15k btu ac unit would you recommend for easy installation and reliability? Thank you

asked by: Tim M

Expert Reply:

I checked with our vendors and we do not have a replacement 3106996.030 relay board. The most cost effective and easiest way to replace your Dometic Duo Therm 620426.321 AC Unit is to use the Advent Air Replacement RV Air Conditioner for Dometic Setup item # ACDOM150B in black or item # ACDOM150 in white.

This system comes with a wiring harness adapter that will make installation a simple plug-an-play operation and allow you to retain the use of your current thermostat and distribution box.

This AC system also includes a start capacitor that jumpstarts the AC when a campsite or generator doesn't provide enough power.

expert reply by: Jerred H