What should the pressure be on a Mercedes air conditioner?
Read the pressure in your air conditioner system. If the pressure is low the gauge reading will be in the white zone. If the pressure is normal then the gauge should be in the green zone. You should not have a reading on the HIGH / RED zone except when the car is turned off, in which case it is normal. Always keep the can UPRIGHT.
What to do if your AC pressure is low after recharging?
It may be worth checking the pressure once or twice after recharging in case the low refrigerant level was caused by a leak in the system. If you believe there is a leak, get a UV light and some UV dye so you can find the leak. The UV dye will make the hole visible when the UV light is shined onto the A/C components.
What should the pressure be on an AC charger?
After determining the correct pressures using the ambient air pressure chart, monitor the pressure readings constantly while charging the system. If the system was low, your AC compressor clutch will not engage. You should notice that as the low-side pressure reaches approx. 25-30PSI, that the compressor clutch will engage.
How to recharge your car’s AC pressure chart?
This refrigerant is NOT compatible with R134A, and should be left to the professional to troubleshoot. Wipe away any dust with a clean rag and then remove the cap from low-side service port. Attach the charging hose to the low-side service port and ensure that you have a secure connection.
Read the pressure in your air conditioner system. If the pressure is low the gauge reading will be in the white zone. If the pressure is normal then the gauge should be in the green zone. You should not have a reading on the HIGH / RED zone except when the car is turned off, in which case it is normal. Always keep the can UPRIGHT.
Where is the low side service port on an AC compressor?
The low side service port is usually located between the AC compressor and evaporator. The low side service port will have a black or blue plastic cap that needs to be removed.
Why is the air conditioner on my Mercedes not working?
The hot summer days are here and you realize that the air conditioner on your Mercedes-Benz is no longer blowing cold air. A/C problems can be complicated but it also can be something as simple as the system being low on freon. This is usually one of the most common problems.
What should my AC low side pressure be?
When the engine is on and the AC is on high, low pressure readings should be around 30 psi and the high pressure side should be about 250 psi depending on your car. The correct reading will display once the clutch engages and the gauge stops cycling.