2000 GMC New Sierra 1500 "heater stuck" Questions

truck gets warm no heat in cab new heater core new filters thermostat stuck or heater control valve bad..you may have air in the system too

...Heater is stuck on full heat. It is not responding when I turn the dial to make colder. sounds like you have a bad actuator motor that is what moves the door in heater box to change from hot to ...

heater only blow air out of defrost i have a 2004 gmc sierra ext. cab 4x4 and air or heat will only come out of defrost. wont blow out vents or feet. my defroster is stuck blowing on vent and will not

...stuck open. If this is the case, repairing what is wrong with the Vent Control Solenoid has a very good chance of fixing BOTH codes. There is a Technical Service Bulletin (TSB) for your vehicle that ...

stuck open, heater core clogged, or heater control coolant flow valve stuck closed. With the engine at full operating temperature check the hoses at the firewall going to the heater. If one is hot and

...stuck in the cold position. Hello. When the heater blows cold air begin by changing the thermostat. This is a cheap fix. Chances are the thermostat is stuck so no hot water is circulating into the ...

for some reason the heater blows hot air when the heater off? the heater door is stuck in the open position... the most likely cause is a stuck or non functioning actuator on the heater door

...the right one. that should fix if not the heater bypass hose is stuck closed. either the system is clogged or theres a leak, or your thermostat is stuck closed and your heater core is stopped or

...for cabin left and right, on some instance those selenoid valves to adjust cabin heater stuck open or closed like thermostate acts on first case. so heat is not enough to heat up cabin

...could just be stuck check on heater matrix pipes in engine bay for unit work heater control from inside to see if there is any movement on unit can try moving by hand to see how badly it has ...