A/C blows hot after running fine then gets cold again? - Diesel Forum

94guy · 05-19-2005, 06:21 PM

i turn it off for a minute or 2 and it's cold again. it seems to have a good charge. i wonder if it could be the clutch fan? maybe the a/c is building to much head pressure? it's a 2000 with 143000.

JimTJr · 05-19-2005, 06:47 PM

That or maybe your blower door is not staying shut,,,and it's moving from heat to AC...dont know exactly if this would be possible. But if you have a vacume leak then it may be plausible.
If you have the hood up you can tell when the ac is engaged and when it is'nt. Maybe watch the compressor?

ffs1 · 05-19-2005, 07:25 PM

I JUST WHENT THROUGH THE SAME THING ON MY O2 REMOVE THE AC CLUTCH AND PUT A SMALLER SHIM IN PLACE OF THE ONE YOU TAKE OUT THE SHIM IS IN THE THE SHAFT OF THE CLUTCH BE CAREFUL WHEN YOU REMOVE THE CLUTCH OR YOU WILL LOSE THE SHIM.I THEN ORDERD NEW PARTS TO REPLACE THE CLUTCH AS IT WAS WORNE BAD. THE CLUTCH IS 3 PARTS FIELD,PULLY,AND CLUTCH . SORRY FOR THE CAPS I JUST LOOKED UP