Does the heater control valve anything to do with the A/C ?My heater control valve needs replacing, as it leaks when I put my truck's heat on. No heat, no leak. I have to periodically re-add Prestone every once in awhile after using the heat . I've checked the valve and it only leaks when I have my heat on, if I don't use my heat, I don't lose fluid. But now I'm wondering if I use my truck's A/C, does the heater control valve have anything to do with the radiator fluid, or just the freon? Thanks in advanceCar Mechanic in training
What you may really want to check is if the heater core is leaking. I have never heard of a valve actually leaking. And no the AC and Heater are 2 different systems on a car. The fan that circulates the air is the same except air flows across the heater core or the air conditioning coil. AC air is usually just recirculated in the car air where heated air is usually outdoor air combined with in the car air.
the control valve when its turned off keeps water from circulating thru the heater core.. so the hot water doesnt counteract the coolness coming off the evaporater in the ac box under your dash that is the only place those two systems interact.. it sounds like your valve is working fine aside from the leak although i myself would replace it since by winter you may forget that it leaks and on a long drive end up overheating the truck the valve usually runs about 30$ and isn;t difficult to change its worth fixing
The heater control valve has nothing to do with the A/C.
Honda guy has the excellent answer, yet I actually have a pair issues to characteristic. whether it truly is like my daughter's 1993 Accord, it truly is extra straightforward to do from under the motor vehicle than above it. if so the converter warmth preserve is interior of reach and it badly cut back my wrist whilst i attempted to get the valve hose off the heater middle - positioned a rag on that depraved element. Be very comfortable mutually as wrestling the hose off the heater middle pipe that sticks with the aid of the firewall - the pipe is skinny brass and truly deformed. it truly is great to cut back the hose lengthwise and peel it off, and wait and notice. you will want to alter that little bit of hose besides. EDIT - one extra element. After refilling the coolant, locate the nipple (probable on the thermostat housing) for bleeding the trapped air out of the cooling gadget. Open it 0.5 a turn and close it whilst a comfortable flow of coolant comes out. ultimate up the radiator - undergo in suggestions, consistently use perfect coolant diluted in accordance to instructions with purified water, on no account faucet water. existence is physically powerful.
