1993 4Runner A/C Problems

[Dr342]

Well I have an intermittant A/C problem on my 1993 4Runner SR5 with 6cyc, automatic 2x2. (133K)

A/C is charged with R134 by the dealer about 12 months ago. Sometimes its cold, sometmes just the fan blows. Yesterday it was out all day. Today it worked fine.

Dealer said it may be the "H-Valve" deep under the dash. I looked t at the manual and do not see an H-Valve anywhere.

Any ideas on what to do first?

 

[spec]

They probably mean the txv (thermal expansion valve). Does the fan come on when you turn the a/c on? does it only get cold while in motion and hot at a stop? Be sure your motors actual fan clutch is workin, it not cooling the motor properly can cause this issue. It could also be over charged. Check and see if your compressor is clicking on and off. If you notice any of these problem, simply google it. Or reply with more information.