pc820

I'm going to clean or replace the duo valves that are part of the heat and A/C system. Currently from time to time hot air comes out of the side vents while cold comes from the center.

Once I remove the duo valve cover for cleaning, does anyone know if I will have to recharge the A/C system?

Thanks....

vinceC

No. The valve regulates the flow of coolant through the heater core. It has nothing to do with the refrigerant cycle.

pc820

great, thank you

Ali Daei

I have a question. if i completely remove the duovalve will the ac still work?

vinceC

No. Coolant will flow unrestricted into the heater core negating the cooling effect from the evaporator. You would have to block the coolant lines and then the heater won't work.