DOMETICAir Conditioners 3316230.700 Control Kit/Relay Box Heat/Cool with Polar White CT Wall Thermostat

I like that this product came with the display unit. It’s modern and very useful.

Product worked 100%.Solved the problem.Thanks.

May air conditioning unit stopped working after a lightning strike close to where it was plugged. The fan would start but the compressor would not start. After troubleshooting and finding that the compressor was not bad, the dealership wanted to schedule a service visit weeks away and then wait for the Dometic guy to stop in and look at it. I decided to just replace the relay box and thermostat myself. It worked flawlessly after that. I do not like this digital system though. My AC unit always turns off when the power momentarily drops. I installed a second unit in the bedroom with a mechanical thermostat and it always comes back on when power is restored. I recommend this product if you think your relay board is bad. Always replace the thermostat with board.

Plug ans play

This is the replacement box needed to update digital thermostat. You will need to be sure you have 12volt at thermostat. I just used 2 cat5 wires that were no longer needed as this will only use 3 to control box