Forum Discussion

Cheryl_B's avatar
Cheryl_B
Explorer
Aug 11, 2016

Roof a/c froze into a block of ice overnight.

I had the thermostat set so it wouldn't get too cold in here, like I always do. Had it set to "low cool." Woke to a/c sounding very bad. Shut it off, opened the hatch inside the coach and found the condenser was a solid, smooth, equally thick (all over) sheet of ice.

I have the hatch open and I put a bunch of paper towels in there to hopefully catch most of the water as it melts. I've been using the a/c pretty much on a daily basis since I moved into the RV on June 19th. This has never happened before.

To reiterate, I didn't have the a/c set to full cold, I had it set to only keep the rig from being too hot overnight. Thanks for your input. We're in the midst of an August scorcher. Not a good time for this to happen, and I just (last night, in fact) loaned my mother my big floor fan.

21 Replies

  • First be sure filters are clean. There should be two settings. Fan speed, and the thermostat. To get though this trip, set fan speed on high. Set thermostat so the compressor kicks off at about 75 degrees. Give that a try and see if that stops the icing.

    Theoretically these shouldn't ice up. But they often do. Be sure filters are clean. Be sure there is good airflow and cold air doesn't immediately recycle back through AC unit via missing duct tape or bad duct work. Sometimes no matter what you try they'll ice up on occasion.