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Why is only warm air blowing when heat is on full after putting in a new thermostat?
Wiki User
∙ 19y ago
The first possibility is the thermostat didn't work. To find this out, after the engine is warmed up u check the hoses going from the engine to the heater, they should be hot. if they are hot then the next reason would be a cable to the temp on the heater needs to be adjusted or the heater core is plugged inside or out.
Wiki User
∙ 19y ago
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Why is your heat blowing out cold air?
Replace Thermostat
The engine is overheating and you have no heat just cold air blowing?
Probably a bad thermostat.
Heater blowing out cold air?
Check the radiator for full coolant. Check the engines water pump and thermostat, as the engine coolant carries heat from the engine into the heater core.
Your 1995 ford E150 quit blowing warm heat?
Flush your radiator coolant and replace thermostat
Radiator keeps blowing water back over heats?
bad thermostat or bad heat gasket
Why is the heat and air system only working on emergency heat?
when running the heat-pump the air blowing from the heat ducts is not hot ( it's to cold for the heat-pump). you have a main furnace and it won't turn on ( is thermostat selected for this source), ( is the power switch for main furnace on ), ( is fuse for this furnace good). If these are good (check thermostat wiring at thermostat, and transformer).
Why is your 1999 F150 blowing cold air when the heat is on?
Low coolant? Defective thermostat? Heat control cable not adjusted properly? Heater core plugged or airbound?
Your heat is blowing cold in your 2002 galant what should you try?
check your water or coolant level If coolant level is ok, replace the thermostat.
How can you tell if the thermostat is going out?
Vehicle takes an excessive time to attain normal operating temperature Heat not HOT with coolant full - thermostat not closing properly Vehicle heats up too soon - No heat with coolant full Coolant boils out of reservoir or top of radiator - thermostat not opening
Why does your engine not heat up?
does the engine not heat up or does the car not blow out warm air when you turn on the heat?If the car is not blowing out warm air when you turn the heat on then you need to check your coolant levels. the heat will turn off if there is not enough coolant in the car.If the temperature gauge shows that your engine is not warming up you may need a new temperature gauge (thermometer)A2. Another source could be that the radiator thermostat is open all the time. This you may easily check by removing the thermostat from the radiator, and checking that it operates by putting it in some water which you bring to the boil.
4.3 vortec running hot no heat or defrost?
try putting anti freeze in it, you may also need a new thermostat
I have a 1992 Chevy blazer my air works but my heat doesnt....i hear the fan blowing but no heat comes in?
If your windows fog up you thermostat may not register because you heater coil may be broken.
