Posted by Allan In NE on August 26, 2011 at 18:52:52 from (148.66.98.174):
I'm so tired I'm rummy and can't even think.
1066 air conditioner. Straight ahead external type expansion valve system with pressure switches.
A few days ago, it was working just fine, then a condenser fan started to scretch. Then it, just as fast, stopped and all seemed okay.
But later in the day, I notice that it isn't cooling like it should and I figure it needs topping off so I started adding some freon; the first can had the sealer (cure that slow leak, ya know).
On the second can, it starts cycling and then stops coming on. Compressor won't come on for only an eyeblink and then off again for a long, long time. Okay, check it and the high pressure switch is opening. Ah Ha! Bad pressure switch!
Jump across the switch and then the compressor blows off. Whoops! Too much pressure! Gotta be that silly expansion valve. Take it out and can't see a thing wrong with it.
Should have added that before I pulled the expansion valve I foundd that the condensor fan motor is locked up. Fixed that, but still too much pressure.
When I emptied it, seemed like it took forever to drain down.
I'm startin' to think that I shot myself in the foot and liquid locked the goofy thing and that fan motor was the trouble all along?
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