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If 1993 suburban rear ac not cold how can check the expansion valve?
This usually happens because the AC is set to heat and not cool. If it is set to cool then get it checked out by a qualified AC technician.
No.
It might be overcharged. Or you might have contaminants in the system like air or acid.
They do this when the unit gets low on refridgerent. Which is r134-a.
check you thermostat for the temp setting
The AC doesnot work properly if there is a gas leak or if the gas volume become to low, then it will only cool and not be cold. please check your AC gas levels
Just as a cold can of coke will bead moisture, so does the cool surfaces of the AC unit.
Your outside AC unit may be blowing cold air because it is functioning properly and is working to cool the air before it enters your home. This is a normal operation of an air conditioning system.
Check the pressure on the low side of your ac it should be between 28 and 38 PSI, you are likely low on refrigerant
For the room to cool down faster, set the AC to high cool initially to quickly lower the temperature. Once the desired temperature is reached, switch it to low cool to maintain the coolness without overcooling the room.
Go for a swwim in the local swimming hole. Relax with a nice cold brew AC Fan