Dometic AC Freezing Up

[avvidclif]

I recently sealed the Main AC unit to try and stop it from freezing up. I taped the dividers to keep the air from mixing. As a test I ran the Bedroom AC for several days and it never froze up. Then switched to the garage AC and it did fine. I turned on the main AC and it lasted about a day and it's frozen solid. It has been operating with the fan on Auto. Once it thaws out I will try the fan on high and see if it helps. The other 2 not freezing up bothers me though. The humidity should have been low as the tests were run back to back, turn off one turn on the next.

Any ideas?

 

[Lou_and_Bette]

My bedroom a/c did the same thing. Found the anti-freeze sensor had fallen out of the cooling fins. Look for a small straight probe with a flattened end and replace in the lower right corner of the fins about 1/3 up from the bottom. Mine was on the inside but some are installed under the shroud on the root. You may have dislodged it when you were taping.

 

[avvidclif]

Which side is it on, the air in or air out?

I was taping because it froze up and then water was not draining correctly. I got that fixed, the drain problem but it's still freezing. I'll start looking for the sensor. The other 2 are identical unit and don't freeze. Grrrr

 

[Lou_and_Bette]

The probe on mine is on the "air in" side It looks like a thick wire with a hard, thin part on the end of the wire with a smashed flat end that goes between the fins. Look for a wire that is unattached on one end in the maze of wires.

 

[avvidclif]

Will do, Thanks.....

 

[avvidclif]

Re: Dometic AC Freezing Up FIXED

AHA, that was it. Floating around in the mass of wires. Now to get it back in place.

BIG THANKS to all.