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96 chevy pickup not changing from ac to heat. i have flushed the entire system and even got all the air out of the system

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  • Chevrolet Master
  • 6,927 Answers

This will most likely be the temperature actuator that is at fault this controls the door inside the havac box.

Posted on Dec 08, 2017

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Posted on Jan 02, 2017

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fyrebyrd1
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SOURCE: 2001 Chevy s10 with no heat

If you are certain there is no air in the coolant system, then there is a chance that the blend door motor is not working or the heater control assembly is bad. since you have replaced your own heater core you probably noticed the the doors inside the heater core housing. One of those doors is controlled by the "hot/cold" knob. The motor on that door could bad.

Posted on Oct 21, 2008

Molson02536
  • 3854 Answers

SOURCE: A/C in 96 Chevy Pickup not cold, needs recharged

http://www.cyberbright.com/autobin/air_conditioning.htm Here is a write up on the recharge procedure. Hope this helps,keep me posted, be glad to help. Just be careful not to over charge the system, that will result in a damaged A/C compressor. 

Posted on Jun 23, 2009

  • 1 Answer

SOURCE: 2000 Chevy Silverado 1500 The heater does not

Had the same thing happen to my truck, the blen door actuator is under the console on passenger side, but the heater core is going to be clogged if you dont have any heat coming through, but a/c works..

Posted on Oct 06, 2009

  • 1206 Answers

SOURCE: I have a 2000 Chevy Silverado pickup, and the

once truck is warm check both heater core hoses to make sure they are both warm if not then check the cold water valve could be stuck shut not allowing coolant to travel in to heater core.

Posted on Jan 05, 2010

  • 95 Answers

SOURCE: Hi;I have a chevy s10 pickup 1996 no heat the

It is possible you have air bubbles in the cooling system. Loosen radiator cap or resivor cap and let idle for about 15 minutes. Tighten cap and drive and see if that helps. REMEMBER TO START THIS PROCEDURE WITH A COOL MOTOR AS THINGS WILL BE QUITE DANGEROUS DUE TO COOLING SYSTEM PRESSURE WHEN HOT.

Posted on Jan 18, 2010

Testimonial: "Hi;Your information confirmed what I thought and bought a new radiator cap and checked over flow hose and tank it is hot again seems fine.Thanks Randy"

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97 Kia SPORTAGE : No heat, blower works, AC works,


Did you bleed your system of air???....usually a bleed screw near the thermostat housing...get allllll the air out...simetimes the heater core is at the highest oart if the system..therefore if there is air in system..thats where the air settles and no coolant will flow through the heater cire!!

Oct 01, 2013 | 2000 Kia Sportage

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Heater doesn't get hot on 96 chevy truck. Blows good, just cold. Replaced thermostat, flushed radiator. Any ideas?


Air Temperature Control Blend Door Failure No Heat or no AC (dependes on where door sticks)

In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.

Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.

Dec 06, 2012 | Cars & Trucks

1 Answer

98 chevy S-10. I turned on my heat one time, it made a weird noise then lost the heat and only blew cold air. After changing the lower heater hose, which was busted, I tried flushing the system and lost...


simply connect a garden hose to ether side of the heater core and turn on the pressure, it should flow freely, this is a good method to flush the heater core, then flush in the opposite direction

Jan 27, 2010 | 1998 Chevrolet S-10 Pickup

1 Answer

Hi;I have a chevy s10 pickup 1996 no heat the radiator and heater core has been flushed twice.Also has a new thermostat and it wooked acouple days and now back to luke warm air any ideals?Thanks Randy


It is possible you have air bubbles in the cooling system. Loosen radiator cap or resivor cap and let idle for about 15 minutes. Tighten cap and drive and see if that helps. REMEMBER TO START THIS PROCEDURE WITH A COOL MOTOR AS THINGS WILL BE QUITE DANGEROUS DUE TO COOLING SYSTEM PRESSURE WHEN HOT.

Jan 18, 2010 | 1996 Chevrolet S-10 Pickup

2 Answers

I have a 2000 Chevy Silverado pickup, and the heater will not blow hot air. I replaced the thermostat, and nothing changed. The radiator was flushed and filled in the last two months as well. I have all...


once truck is warm check both heater core hoses to make sure they are both warm if not then check the cold water valve could be stuck shut not allowing coolant to travel in to heater core.

Jan 05, 2010 | 2000 Chevrolet Silverado 1500

1 Answer

A/C in 96 Chevy Pickup not cold, needs recharged


http://www.cyberbright.com/autobin/air_conditioning.htm Here is a write up on the recharge procedure. Hope this helps,keep me posted, be glad to help. Just be careful not to over charge the system, that will result in a damaged A/C compressor. 

Jun 23, 2009 | 1996 Chevrolet K1500

1 Answer

*96 Chevy Tahoe


Hello,
After your exhaustive tasks I feel one of two things are left to rule out.
First, have you an air lock? did you bleed the cooling system after installation of parts? if not try parking on level ground, with engine cold not running remove coolant filler cap and top up if required to correct level.
Start the vehicle and leave to idle with cap off, have plenty of hot water available, when at operating temperature you may here gurgling and see bubbles in the cooling system Beware not to get too close as it will hopefully boil over, after it does top up with warm water and wait, keep blower on full and heat to max inside vehicle.
It may boil/bubble over a few times before settling if so top up and replace cap once settled.
Finally if an abundant amount of air bubbles are continually visible and regular bubbling over then unfortunately the cylinder head or gasket could be at fault.
I hope this points you in the correct area.
Please remember to politely rate this possible remedy!
Onyer~EDson(:0) {#><U.K.

Jan 21, 2009 | 1997 Chevrolet Tahoe

3 Answers

Blowing cold air


I had the same problem that I just fix by flushing the heater core out with a hose.   take the two hoses off the fire wall and put the water to it and let flush.  my heater is putting out 150 dg. F  of hot air.   I'm so excited!  i will stay warm now.

Dec 22, 2008 | 1999 Chevrolet Silverado 1500

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