Posted by Allan In NE on July 23, 2008 at 00:06:06 from (64.187.91.49):
In Reply to: auto a/c posted by 620 row crop on July 22, 2008 at 22:04:47:
What Bob said.
Your gauge readings are telling you that the system is plugged up; high side is too high and low side is too low. A good, clean system will read 42/165-170(your high side will vary depending on locale, ambient temp and humidity).
Did you disassemble the system’s high side, flush it out entirely and replace the orifice tube?
They "always" plug the orifice tube and "many times" will plug the lower end of that condenser when a compressor unravels.
Go in behind the right front park light. Ya have to take out the light assembly. Behind it, there is a pipe connection; open it up and that orifice tube lives inside the condenser-side pipe.
Pull the plastic end of the little tube out with a pair of needle-nosed pliers and you’ll see what I mean. Screen is gonna be chocked full of lost metal and black mud.
Flush 'er all out with a flushing agent and REPLACE that little orifice tube.
Then, after you get it back up and running again, look at the condenser while in operation. If you see any evidence of frost along the lower 3-4” of it’s width, the condenser is plugged and will probably need replacing. If it is hot across it's entire width, its okay.
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