my a/c is not working, I was told there was blockage in one of the lines, they dont know exactly where. how hard is it to change seals and can I blow out the existing lines to clear them, is there a rebuild kit these people want to charge me $500.00 bucks to get it working the truck is a 1992 f150 it has already been changed over to r135 how much should this be costing me any help would be appreciated

 

Many times it is a clog in the orifice tube. I think mine has a clog in the same place. It blows cool air driving down the road but blows warm while stopped.

 

x2 on the orifice tube. yes, the parts store sells an O-ring kit for the ac system and it shouldn't be a problem to blow hoses out as long as you're only blowing the hoses out..not the dryer etc. AC guys always charge alot.

 

What leads "them" to believe there is a clog?
If there really is a blockage the debris had to come from somewhere, likely the compressor or a ruptured desiccant bag in the accumulator. Both are expensive fixes.
Without knowing the system pressures you are shooting in the dark.


F3fitty, your problem is not a blockage. Most likely your fan clutch is bad, you have the classic symptoms of a failed fan clutch.

 

I agree, that sounds like a fan clutch issue your having F3fitty.