On Tuesday, June 2, 2015 at 6:21:20 PM UTC-5, J Burns wrote:
On 6/2/15 4:12 PM, J Burns wrote:

How about your drier? Many times, a drier will last the life of the
system, but not always. They can get clogged.

I've read that the water in freon can cause all kinds of problems. I
wonder if one problem could be a buildup of ice in the valve on the
evaporator that separates the high side from the low side.

When the compressor wasn't running, the ice would melt. Then the air
conditioner would run normally until a buildup of ice blocked the valve..
You'd lose your cooling, and I imagine the compressor would overheat.

Found it!
http://www.freeasestudyguides.com/ac...ion-valve.html

If a car drier fails, the AC will run a little while, then quit cooling
when clogs the expansion valve.

Many home AC systems have a calibrated orifice instead of the more efficient expansion valve and the orifice can freeze up and clog with ice if there is moisture in the refrigeration system. Most condensing units have a factory filter/dryer on the liquid line inside the condenser case. They can become clogged and need to be cut out and replaced with a short piece of copper tubing and a new dryer installed on the liquid line outside the condenser housing. Of course the refrigerant must be recovered before cutting any refrigeration lines. The freeze up can be easily diagnosed with a set of gauges if you know what readings you should look for. 8-)

[8~{} Uncle AC Monster