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Heater will not turn off

I have a 2004 ford f150 and the heater temp can not be adjusted it is always blowing hot air

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You have a defective climate control unit. The only fix is to replace the unit. Try for the climate control. It will be half the cost you will pay at auto parts store.

Posted on May 15, 2014

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Posted on Jan 02, 2017

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SOURCE: Heater wont blow hot air anymore.

In all probability the heating element has failed and the cost to repair would be more than the cost to replace it. Inexpensive heaters do that over time.

Posted on Dec 02, 2008

  • 72 Answers

SOURCE: HVAC heater fan blowing backwards.

this is tech crazy

kindly rate me on the above said solution

Posted on Feb 02, 2009

  • 185 Answers


Or you need anitfreeze.
Or your thermostat is shot. Both are easy fixes.
Try the antifreeze, first,check and top off.

and if teh problem persists, check and repalce the thermostat.

Posted on Feb 02, 2010

  • 403 Answers


need to know what kind of heater it is. most likely the factory t-stat is no good. will need to remove and connect the manufacturer for a new one. they are parts specific to the unit

Posted on Mar 04, 2011

  • 23 Answers

SOURCE: heater on 2001 ford f150 supercrew

sounds like the heater core is bad. It could be plugged. Have you flushed the system? The radiator and heater core work together.

Posted on Dec 07, 2011

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1 Answer

Heater will not blow hot air, on 1990. Ford F150 5.0

Check the temp. the engine reaching running temp.?
Is the radiator full? The overflow tank at proper level?
No warm air in defrost?
Could be a bad blend door motor(vacuum or electric,probably vacuum).
don-ohio (:^)

Dec 04, 2016 | 1990 Ford F150

1 Answer

No heat in F-150 could it be thermastate

-No. not the thermostat. Here there are couple thing that cause the heater not blow hot when you need hot.
1. Water line to the heater core is plug, or the control valve is not open due to broken linkage (Cable).
2. The vent butterfly stuck in cold air position.

Good luck


Feb 04, 2014 | Maisto 2004 Ford F150 Fx4 Pickup Truck...

1 Answer

I have 2004 f-150 heater blows cold air when swithching to heat on temp control

Check engine coolant if it is low it will cause the heat to blow clod. make sure and check it while cold. also if it only last a second or two that is normal the heat controler is in many cases operated by vacuum.

Sep 20, 2012 | 2004 Ford F150

1 Answer

Recharged 2001 f150 5.4l a/c w/36 oz,compressors working blows hot air only,is there a blockage In the lines.

Check the heater tap moves when you adjust the temp dial. A/C will not work with the heater on.

Jun 02, 2012 | 2001 Ford F150 Styleside SuperCrew

1 Answer

Ac blows hot air comp is running

Make sure that the tubing around the accumulator is getting cold.
If not, the refrigerant may not be charged up.
Otherwise, the vacuum motor for selecting cold air may be not working correctly causing heated air from the heater core to be routed to the interior of the car.

Do you hear the vacuum motors working when adjusting the heat to cold selector? or changing the thermostat temperature if so equipped?

Jul 03, 2010 | 2004 Ford F150

2 Answers

4.6 liter has one heater hose warmer than the other. may be plugged core,or is ther a fuse to climate control switch?

Look for a heater valve on one of the hoses if there is no valve i would say its a plugged heater core.

Dec 11, 2009 | 1999 Ford F150 Regular Cab

1 Answer

1997 F150 heater problem

your problem is caused by the air temperature control blend door actuator motor being defective, the little motor moves the door that gives either hot air or cold air or a blend of the 2.

Feb 21, 2009 | 2004 Ford F150

1 Answer

Heater on ford 2003 ford pick up blows cold air

on the evap box there is a control mtr that switches the hot cold door. these mtrs are prone to failure. the other problem that i have seen is that the door breakes in side the evap box and that means removing the box to replace the door . if i remeber correctly you may have to slide the dash back to gain assces to the control mtr to test it good luck

Dec 21, 2008 | 2001 Ford F150 Styleside SuperCrew

1 Answer

No hot air .

the blend door motor could be bad or the door itself could be broken inside the heater box. big job to fix that, the entire dash has to come out.

Oct 16, 2008 | 1998 Ford F150 Regular Cab

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