rdad993

• Today we went on a cruise up into the NC mountains where it's nice and cool in summer, low 70's today. On the way back home dropping down into the Piedmont the air temp quickly got up to 96 and very humid. The a/c slowly stopped cooling. So we continued in the heat 'til home. Back in the garage the evaporator lost its ice and a very large puddle formed under the car. A/C blows ice cold now. It never happened before in similar weather, maybe it's a function of the very high humidity today. Easy to get the air going again, just let it melt. My question - is this common, have any of y'all experienced this? Thanks Glenn

Update - I found info on this issue on some early posts, so I will try some of those suggestions.

pp000830

If it has iced up a previous discussion of how to fix this is to relocate the temperature sensor a little lower on the evaporator coil, something I have not done or even seen how to do.

Also here is a thread discussing where the sensor is located, with pictures, and testing it.
https://rennlist.com/forums/993-foru...-location.html

Andy

rdad993

Thanks Andy. I found that and I am now trying to visualize how to do it. It's pretty tight in there. Glenn

INTMD8

I had the same thing happen and based on those older posts moved the sensor, so far so good.

Khloesdad

I've also seen this happen in certain conditions when the fan speed is ran on low for a long period of time. A higher fan speed can prevent the condensation on the condenser from icing up thus making it harder for the fan to push air through the condenser.

pp000830

Hi Glenn,
You prompt me to think that what changed to cause icing?
If not a sensor issue maybe the evaporator is clogged with lint and mold accumulated over 25+ years reducing airflow encouraging icing?
Midway down on this page is how I cleaned my condenser coils:
https://993servicerepair.blogspot.co...ditioning.html
It's an easy thing to do, minimally invasive so maybe worth trying.
Andy

rdad993

Andy, I took the air filters off the unit and was able to peer into the suitcase and the evaporator appears to be clean, no mold or dust. I saw a link to how to place the temp probe lower in the evaporator, but somehow I can't find it now. I am not a fan of pulling the suitcase as the a/c works fine most of the time, so unless I can find that missing link, I will let it be for now. Thanks all!

911PERVY

Condensers dont ice up, I take it you all mean evaporator?

Khloesdad

I stand corrected. I always get the 2 words confused.