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Evaporator icing-- how to fix? 200 1992

posted by  greg_mustang on  Mon Sep 13 05:03 CST 2004
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last visit: Sat May 10 07:26 CST 2014
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Hi Herb,

Nice to see your evap can actually get that cold! :)

Yah I would check that the drain is not clogged and the evap housing filling with water. Basically at idle on a humid day (not many left now) run it for a few minutes and then look under the car, water should be running down around the center of the firewall area. If not water with cold blowing A/C, drain is clogged, common problem. Easy to unclog the tube from underneat, it fills with road crud.

Your 'dial' on the dash is a thermostat. It has a probe that goes into the evaporator. It is possible the person who last worked there did not install the proble correctly. Without it, it would think the evap is always cold and never cycle off the compressor clutch. Evap freezing in this mode is completely normal, it's like the dial is in the red zone. See owners manual, it explains that.

I woud make sure the probe is curretly installed in the side of tyhe evaporator (passenger side) and the thermostat switch (in the dash works as expected. ... maybe he even broke the probe.

A low charge would make is less cooling efficient, not colder. 93- 240s do not work like this, very different with the pressure sensor on the accumulator triguring the compr clutch.

Take care!
Greg Mustang
greg_mustang@hotmail.com
Montreal - Ottawa





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