AC Radiator stays on

[Fred Cook]

 I filled my AC compressor filled with R132 because the Dash AC would not work. Now the radiator upfront that supports the AC runs all the time, even with the AC off and.... with the coach shut down with the key off. Also, the AC still does not produce cool air. So I disconnected the wire to shut the small radiator down.  Any ideas on what might be going on here?

[Pat Long]

I wonder if the high pressure switch is bad of stuck on.   You say R132, did you mean R134.

[Fred Cook]

Yep, 134... where would the high pressure switch be located?

[Keith Moffett]

Fred
The high pressure valve is just at the base of the windshield under the front cap.  One must be very skinny to fit up in there.
There are pressure switches on the drier I think too.
Sounds to me  like you over charged the coolant.
If your compressor comes on and the clutch engages then I would guess that the drier bag blew up and sent desicant into the high pressure valve.  Flush the lines with brake fluid and install a new valve.  Repressure the system.  This is what the shop did to our 02 and it was great afterward.