Question about 2001 Chevrolet Impala

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The heater is put out heat but is no blowing the heat out is it my heater core or my blower

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This will be the blower motor resistor.It is next to the blower motor.

Posted on Nov 18, 2009

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No heat in 1996 grand cherokee


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Heater is not blowing hot air


How old is the coolant in your car? If you haven't changed the coolant in a couple of years, you may have sediment build-up in the heater core that is restricting full circulation in the core and preventing good heat output. Feel both hoses at the firewall that go to the heater core. Are both equally hot when the engine is warmed up and heater controls on high? If only one is hot, and the other lukewarm, the core is partially plugged. Pull off both hoses there and run a garden hose at low volume backward through the core. If not sure what is backward flow just run the garden hose through both openings and see if you can remove any sediment or blockage.
If both hoses are hot, the core may be circulating fine, and the problem may be in the heater case's doors not opening fully- I think that would be the temperature blend door. When heater controls on full heat, the door should be fully open to let blower air pass across and through the heater core to pick up heat and pass on through to vents.

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2002 nissan altima heater problem


have 2002 altima,blower works no heat at idle and very little heat when accelerating.I changed carbon cabin filter,made sure little gear under dash to temp knob wasnt broken,flushed and bled system.Nothing worked so checked hoses to heater core and found inlet hose was hot,outlet hose was not.So investigated this problem and came to conclusion heater core was clogged.An easy way to check is to get car to normal running temp. put on heater and blowers at full.Go under dash on passenger side where counsel meets firewall,this is where heater core core inlet and outlet aluminum tubbing go through firewall,you will be able to feel both tubes one closest to you is outlet, so if this one is not hot and and other is your heater core is clogged.I detached both inlet and outlet hoses to heater core from water control valve.Then I blasted water with waterhose and nozzle set at jet,first through outlet hose to blow gunk out,then through inlet hose until water runs clear.Reatach hoses fill and bled system.heater works great nice and hot!

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CHECK SEE IF HEATER BLOWER MOTOR WORKING, REMOVE HEATER BLOWER MOTOR HOT WIRE HEATER BLOWER MOTOR SEE IF BLOWER MOTOR WORKING BLOWER MOTOR FAULTY OR YOU HAVE FAULTY WIRING AT BLOWER MOTOR AND RESISTOR.

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My son is having a problem with no heat at all. Is it a resistor or fuse?


Well if the blower is not blowing at all, then I would say one should check into the motor for the blower and the relay as well as the fuse to it.

If the heater blows but no heat comes out (it's cold in the winter) despite setting the controls to maximum hot, then I would say the blend door could be not positioning itself to allow hot air in from the heater core, or the heater core is plugged.

So,

If the two heater core tubes at the firewall are hot, then it's a blend door problem.
If the two heater core tubes at the firewall are cool, then it's a plugged up heater core.

Good luck on this repair.

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It's less than foot from the heater core. I would guess that either the damper doors are not on correctly or the vent hoses are not hooked up. Can you hear the blower motor running? Maybe they didn't hook the motor back up when they replaced the heater core. It takes a ground and a hot wire.I can't remember where it's at but it may be part of the same unit. Did you check the fuse?

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