Question about 2000 Oldsmobile Bravada

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When going from heat to air still throwas heat like the door for air is not opening

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Have you checked to see if the a/c needs charged I have seen systems throw heat when the charge is low.

Posted on Apr 25, 2010

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The heat started to only blow out cold air, replaced heater core an thermostat still getting cold air blend door is opening an closing as should


If both heater hoses are hot, then coolant is coming and going into/out of the heater core. The only thing that would affect heat would be a blend door not operating correctly. You will have to check the proper door that controls hot/cold air.

Nov 15, 2015 | 1998 Lincoln Navigator

2 Answers

I have a 2006 Dodge Grand Caravan. Until recently the heat and air worked fine. The temperature gauge is registering to very hot but nothing but cold air blowing. after a few minutes the temp goes back...


First you need to put in a thermostat. On most vehicles it is not a hard or expensive job. The gauge going up to very hot is sign the thermostat is sticking and taking too long to open. The heat is fed to interior by hoses from same system as radiator / thermostat. If thermostat is staying open too much (because it can also stick open when going bad) it will take a long time to get warm. The heater box under dash has both the air conditioner and the heater box in it and if the door is stuck to A/C side you will not get heat. Door is usually opened by vacuum hose, cable, or electric motor. If you can look under dash and see the lever that moves the door you may find it is not moving when you move lever from hot to cold on dash. If cable driven you may be able to see cable not connected or door lever broken. But when engine reads warm on gauge - look under hood for round hoses (the size of washing machine hoses) that go from engine into passenger area and see if they feel warm. If hoses cold you are not getting warm water to system (clog in system or thermostat), if hoses warm then door to heat box not moving.

Jan 11, 2015 | 2006 Dodge Grand Caravan

2 Answers

What is a blend door on my jeep cherakee sport


this is a small door to control the hot air coming from the heather core to inside room on every vehicle including yours if this part is broken you could get no hot air from your heather or if this part is stuck open you get hot air all the time even with the heather off

Nov 15, 2014 | Cars & Trucks

1 Answer

My heat dosent work


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 20, 2012 | 1997 Ford Taurus

1 Answer

Heater does not work, doors open ok but no heat


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.

Nov 08, 2012 | 1995 Lincoln Town Car

1 Answer

Cant find the door acuator switch on 2001 monte


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.

Nov 07, 2012 | Cars & Trucks

2 Answers

NO HEAT STUCK ON AC HEAR CLICKING IN CENTER CONSOLE


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.

Nov 05, 2012 | Cars & Trucks

2 Answers

I have no heat replace tthermostat,anitifreeze,the hose , I have good air cominng out of the vents last years I had a small bit of heat when I turn on the heat but this year none. what do you think It is?


Assuming the car does not overheat (Ruling out the water pump), I would look for something not opening the heater door. I think this car uses a pneumatic system to open the door for the fan to blow air over the heater core. If that door does not open, you won't get any heat. You probably have a cracked or broken pnuematic line behind the dash that controls the door.

Oct 26, 2012 | 1998 Mercury Grand Marquis

1 Answer

2004 mercury mountaineer.heat problem When turning ac knob to heat clicking sound like door opening and closing repeatedly sounds and air blows cold instead of hot.


2004 mercury mountaineer.heat problem
When turning ac knob to heat clicking sound like door opening and closing repeatedly sounds and air blows cold instead of hot.

Sep 13, 2010 | 2004 Mercury Mountaineer

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