Quote:
Originally Posted by andyh1956
I would bet your evaporator is dirty (Filthy!) pull your blower motor out & you should be able to reach it & clean it with a toothbrush & a garden hose.
If your psi is right, the discharge line is hot, the intermediate line is warm & that accumulator & suction line is cold then it has to be a dirty evaporator or the blend air door.
PS- you can check to see if the blend air door is the problem by putting your pinch off plyers onto the hot hose coming from the engine to stop the hot coolant from reaching the HVAC box. If it starts blowing colder then the door adjustment may be all or part of your problem.
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I installed a manual heater flow valve in the heater inlet hose keep it closed during the summer my vent temps went from 45 to 41 to 40 blend door is closed no need to circulate hot water thru the cab if not needed...........try it