Ihave 1990 w250 and the air conditioner has stoped the clutch is not kicking in it worked perfect up until a week ago already checked the fuse

 

I would try checking the voltage on the wires that go to the clutch. I have never played with AC much, but I suppose it may be a good start.

 

Check at the cycling switch. I believe its near the were the a/c lines go into the heater box.

 

+ 1 on the cycling switch. Mine worked intermittiently for a year and a half until alittle reading on it here on dtr, i bypassed it and now have a AC that blows 28 degrees out of the vents!! Thanks DTR!
ez

 

Is there any r12(or 134a if you made that mistake) in it?

 

your refrigerant might just finnaly leaked out. if you need more you can use this instead of r12
http://hc12ausa.com/

 

Wow..
That stuff sounds too good to be true.
Quote:
made of natural, organic compounds, not a blend of pre-existing, chemically based synthetic refrigerants,

Has anyone here used this substitute and what were the results compared to R-12?
I would like to try some and compare it but it seens odd that there is only a few places to get it in the USA and it is mail order?
Jim
http://www.hcrefrigerant.com/index.htm

 

If you've got a leak- fix it!!


To do a crude recovery, get an empty R12 or 22 30 # container. There's a lock ring around the valve-cut it off. All disposable containers have a 1-way valve. I simply backed the valve out as much as possible, and super glued the check valve piece to the end.
Put the container in a 5 gallon bucket and ice it down heavily. Cold will have most of the freon condense in the container.

M