I have the thermostat as high it will go and cold air comes out. I just had my fluid flushed by some jackass and since then my a/c quit and now my heater wont work.What might the problem be? Heater core? I already checked all of my fuses.1999 GMC Envoy how hard is it to change the heater core if thats the problem?My heater in my truck wont work help.?
Well if it started after the guy did a tap dance all under your hood you need to take it back to him. Get him to fix it.My heater in my truck wont work help.?
You could have a air lock from the fluid flush. But the heater core should be fine. Did they replace the thermostat when they flushed the fluids?My heater in my truck wont work help.?
fluid flushed and no ac...i once had tune up and got a flat tire...there is a door under dash to direct hot air...it may b stuck closed...ac is compleatly differnt matter unless dash switch is shot.My heater in my truck wont work help.?
you should turn the heater on high,then open hood and check both hoses going to heater core, both should be hot. If not then you have a heater core stopped up or a bad water control valve. If both are hot then there is probably a problem with the vac *** control ed air blend system which controls the amount of cool air mixed with heater warmed air. If your heater core is leaking you will probably have fog on windshield and a smell of glycol.My heater in my truck wont work help.?
the heat sensor is bad just go to autozone an replace itMy heater in my truck wont work help.?
IF the [small] vacuum hose fell off or was taken off that goes inside the vehicle - U will have that problem. butt the air would
just come out the floor vents. The small hose usually connects @ the intake manifold. IF when U accelerate the vent air changes from the upper vents 2 the floor - then its just a vacuum hose.My heater in my truck wont work help.?
the suggestion about checking the hoses is the first place to look since that is the easiest. Next, is to check the vacuum line going to your control head (the part that you move to go from hot to cold) that line comes in from the engine compartment and usually goes into the fire wall where the evaporator core is on the passenger side under the hood. In your situation your blend doors can be controled either electrically or by vacuum. the door you are looking for is behind the radio and control head in the passenger compartment. good luck.
