Hi, I have a vehicle where the coolant system was working just fine. I had the coolant system flushed etc. The tech did something that bent the heater valve control cable. Not a problem to fix. In looking at this I found the heater control valve to be leaking at the stem. Not problem, just replace the valve. Sure! ! ! It took 2 weeks to find the special valve. Here is the problem, there is water flow thought the heater core all the time. Yes, hot air all the time and a new valve was installed the way the tech. had the hoses connected. This is and H valve system. Is it possible to have the hoses reversed coming from and back to the engine that would cause this problem.?Thanks,Dick
One of the heater hoses comes from either your water pump or around the thermostat. This hose is the incoming side to your heater control valve and should be on the same side of the valve. The outcoming hose should be connected somewhere back into the block of the engine.
You replaced the valve, but if you didn't adjust the control cable then the valve will remain partially open when the dashboard control registers as off. Put the control all the way to off and loosen the cable connection at the valve. Without pulling on the cable, move the valve control lever to the fully off position and then tighten the cable after first re-checking that the dashboard control remains set completely off. Problem should now be solved.
no. you dont say what kind of car but in general no
