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If you are not getting heated air blowing from the heater core and your
engine coolant temperature gauge is showing LOW or below normal ,
( then YES , IT'S POSSIBLE that your engine cooling thermostat is sticking
open )
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∙ 9y ago
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Heater doesnt work but cold air blows out?
Low coolant? Bad thermostat? Heater core plugged,restricted or airbound? Heater control cable or valve not working?
Why doesnt my heater blow hot air in my chevy truck?
Low on coolant. Bad thermostat. Plugged heater core. Temp blend door inop.
Why does Heater not work in 1991 dodge spirit?
It's possible that your heater core is plugged up. It can also be a bad thermostat.
Why doesnt the heat work in a 1998 Mazda millenia?
Low coolant? Bad thermostat? Heater core plugged or restricted? System airbound? Water pump not circulating coolant? Defective radiator cap?
Why no heat in cab of f350 diesel?
no heat can be caused by,blocked heater core insufficient coolant in engine blocked heater hoses from engine to heater core bad heater thermostat bad thermostat in engine bad heater control switch
What is wrong if a 1997 Saturn SC2 heater does not work and it is not the thermostat?
if the blower motor works most likely heater core is bad. need more info
How do you fix heater on 2000 grand marquis?
is your heater core bad or thermostat bad need more details
Why do you have no heat on your 1979 300SD?
No coolant, bad thermostat, bad heater fan
Why doesn't the heater work in 2003 Buick Regal?
Low coolant? Heater core airbound, restricted, or plugged? Bad thermostat? Water pump not circulating coolant?
Motor heats up no heat out of the heater not overheating?
Perhaps a bad thermostat and/or a heater core
Why will the heater on a GMC Jimmy not work?
Depends on what you mean by heater will not work. If the blower motor will not work, it can be a blown fuse, bad blower motor, bad blower motor switch, or a defective blower motor resistor pack. If you mean that the blower motor works but there is no heat, then it can be a clogged heater core, thermostat stuck open, or defective heater control valve.
What would cause the heater not to work on a Toyota Camry?
Most common things are Thermostat or a bad heater core but could also be something blocking the door down by the heater core. I changed my Thermostat and Heater control Valve to find out a pencil fell in the defroster and prevented the door from closing. Hope this helps.
