Below are the most common things that can cause this new a/c system to not perform as it should. Please check each one and then call us if your issue is not resolved. We are here to help.

QUICK LINKS

HEAD PRESSURES TOO LOW OR TOO HIGH

What measurements mean:

• Low temp and high pressure seem to be equal: you have a malfunctioning expansion valve that is stuck open.

• High side is extremely high and low side is low: there is a blockage in the system. Remove hoses and blow compressed air through in both directions. If pressures don’t change, it is possible your expansion valve is stuck closed and needs to be replaced.

Check that the system has exactly 24 oz. or refrigerant. Too high of a reading may indicate too much refrigerant or inadequate air flow on condenser. Too low is generally under charged.

A/C SYSTEM EMITS UNPLEASANT ODORS

Under certain conditions, molds and bacteria (normally present in the air) may form on the surface of the evaporator core causing an unpleasant odor inside the vehicle.

• Use an antibacterial product to treat the evaporator

• Advise the customer to turn off the system a few minutes before shutting off the vehicle, leaving the blower fan running (this will dry the evaporator core from the moisture that encourages bacteria growth)

THE DISCHARGED AIR OUT THE HEATER DUCTS IS ALWAYS COLD

Check the operation of the water valve. If the water valve is not opening, the water from the motor is not passing through the heater core. Also check to make sure the motors thermostat is installed and operating correctly.

INCORRECT REFRIGERANT AMOUNT OR INCONDENSABLE GASES/MOISTURE IN THE A/C SYSTEM

1. Incorrect refrigerant amount (30-35% more or 70-75% less) = recover refrigerant from the system.

2. Contaminated refrigerant = filter saturated with moisture.

3. Filter saturated with moisture = evacuate the incondensable gases and moisture from the system. Run the vacuum pump for at least 30 minutes.

4. Check the vacuum seal using a pressure gauge tool.

5. Restore the recommended amount of refrigerant to the system as well as any oil recovered together with the refrigerant.