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The blend door could be sticking on the truck. The vacuum system could have a leak. Or the cables to the heat valve could be malfunctioning. Check these three areas to fine why your heater is stuck on hot.
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∙ 9y ago
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Why does 2000 Silverado heater gets stuck on hot?
Is the fan stuck on or is it just hot air even with the a/c on???
1999 dodge 2500 v8 truck not blowing hot air?
is coolant full? if so thermstat may be stuck open or you may have a blocked heater core.
Why does your truck blow heat even in ac mode?
The heater control valve is stuck open.
Why does your heater blow cold air in your truck?
Low on coolant. Stuck open thermostat. Plugged heater core. Faulty temp blend door.
Why does your truck blow cold air?
Assuming you want it to blow hot air, you may be low on coolant or have a stuck open thermostat or a plugged heater core or you have a faulty temperature blend door actuator.
Will a heater coil lose water and make truck run hot?
yes it can. If your heater core is leaking it will leak on the passenger side floor in the cab of the truck or car.
You have a 2003 Jeep Liberty and the heater will not get hot?
The thermostat is probably stuck in the open position.
My heater blows very little warm air on my 1996 doge 1500 truck?
Thermostat stuck open, heater core clogged, or the heater temperture control vlalve is defective.
Why does 1999 grand am not blow hot air when heater is on?
Because your thermostat is probably stuck open
What causes a 1991 Acura Legend heater to not blow hot air if there's no leakage on the heater core or smell of coolant?
thermostst is stuck
Your dodge spirit 1990 heater does not get hot?
Probably a bad thermostat - stuck open so the water temperature in the engine block doesn't get hot enough to make the heater warm.
Why is the heater in your 06 vectra permanently on hot even when turned to cold?
The blend door is probably stuck.
