The heater is not blowing hot air? 2001 F250 - 2000 Ford F250 Super Duty Crew Cabs

2001 Chevy Tahoe Heat Problem - Tahoe Forum

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Dec 5, 2008 - 10 posts - ‎7 authors 2001 Tahoe, the front heater blows a little hot air when the car warms up and then blows cold air. The rear heat seems to work fine. I changed ...

Rear AC blows hot air - Tahoe Forum - Chevy Tahoe Forum

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Jul 14, 2008 - 10 posts - ‎5 authors
On my wifes 03' Yukon the rear air conditioning blows hot air no .... Pull the panel off and look at the hot/cold actuator shown in the picture.

check it the heater control is allowing hot water through the heater core.(turning the tap on )

HEATER NOT BLOWING COLD,NO HOT AIR FROM HEATER,A/C BLOWS HOT AIR,A/C NOT BLOWING COLD, COLD AIR FROM HEATER,BLEND DOOR ACUTATOR CLOSED,HVAC UNIT NOT OPERATING,
http://alltypesofpartsreplacing.blogspot.com/2012/12/heater-not-blowing-coldno-hot-air-from.html

To troubleshoot this types of problem,click the link below :----http://howtobyme.blogspot.in/2012/02/heater-blows-only-from-defrost.html
--------Go through the procedure to confirm the issue.

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Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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This will help.Thanks.

OK, a vacuum controlled blend door is the problem.

REMOVAL & INSTALLATION


See Figure 1

Fig. Fig. 1: Plenum door vacuum motors

1. Disconnect the vacuum hose at the motor.
2. Remove the 2 motor attaching screws.
3. Rotate the assembly so that the slot in the bracket is parallel to the tee-shaped end of the door crank arm, and pull the motor and bracket off the crank arm.
4. Installation is the reverse of removal.

--- Search for other vacuum motors under the dash to see if the vacuum hoses have somehow deteriorated or become detached. --- Try to look up your vehicle on autozone.com for other vacuum motors under the 'heater' section of the 'chassis electrical' section of the 'repair guide' after selecting your 1996 Ford f250 crew cab vehicle. http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f8038ebd8

Recheck your work may have something backwards put selector in ac and see if you have heat may have the cable backwards

check the heater temp. control pot under the hood, inline on one of your heater hoses, it may be sticking causing hot water to only get to your heater core when the engine is at high r.p.m.s

On my F-250 it does the same but the great thing is that the hot/cold air is not hitting me in the face until it get the right temperature to come out of the vents.

check for hot water, check for power to blower, do a little work yourself before asking questions, if you can't do this then you really need help

Test the circuit cold. (when the motor is not working) If power and grounds are good, replace the motor. When you have the blower motor out,check for any debri that has accumulated in the case.