95 gmc sierra sl ac

[weird-o-CLAY]

hello,



I need help



Ima use broken English so forgive me.



I have a 95 gmc sierra sl, I bought this truck 2 years ago and the ac worked. After sitting up to rebuild the trans the ac stopped. I opened the condenser and it was full of shaving so cleaned and blew it out and added a new orfice tube, new evaporator and drier. I’ve cleaned the high s d low lines out and the compressor and yes it still kicks on and works as should, I replaced all o-rings and filled the system with 11oz of pag150 with uv dye to detect leaks. I’ve replaced the blower motor resistor and now setting 1-5 works again. The blower motor works as should on all settings and there wasn’t any trash when I replaced the evaporator. I vacuumed the system for about a hour until it read -30 on high and low side, then let it set for a hour and no changed in pressure showing no leaks. I filled the system with 32oz of r134a but it still blows hot. The heat works when I switch it to heat and the actuator door do rotates and seems to open and close the blend door. I noticed while adding Freon the low side never got cold, I also put a new switch on the drier when I replaced it. ANY SUGGESTIONS?

 

[jd33173]

If your condenser and or other components contain metal shavings, that tends to indicate your compressor is toast and requires replacement. Also you may need to swap the condensor (as some of them are tough/impossible to clean due to how they are constructed) and replace(or at least check) the orifice tube as its probably full of garbage again. What are your low and high side pressures like? My experience w ac is if you miss a step or do it in the wrong order, be prepared to do it all again, especially flushing lines and cleaning or replacing the orifice tubes and or accumulators(where metal shavings go to hide).

 

[someotherguy]

Did you check for specific capacities of oil and refrigerant? I could be wrong but 11oz of oil sounds like a little bit too much. It will vary depending on year, model, etc.

All those shavings surely came from the compressor so it's likely bad, BTW.

Richard