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1999 chevy malibu the heat doesn't work. The fan keep on blowing cold air.

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  • Cars & Trucks Master
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The blend door is not moving. Check under the dash and behind the glovebox for the plenum. look for cables, levers etc

Posted on Feb 17, 2014

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Posted on Jan 02, 2017

jamaicanmech
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SOURCE: My 1999 Ford F150 Heater only blows out cold air

guys have you checked for a vaccum leak????? there is a little plastic ball with a vaccum line going to it that controls the outside air coming in. check for a leak in this line

Posted on Jan 08, 2009

  • 56 Answers

SOURCE: 1999 chevy malibu engine keeps over heating,

Overheating could be a combo of many thing's.If your thermostat is stuck you will have no circulation which will cause overheating.Also if your eng. has alot of miles your water pump may be in need of replacement.Listen for your radiator fan motor and be sure that's working and also check to see if you radiator is good.If your loosing antifreeze because of a headgasket you will see a white cloud out of the exhuast because it is burning it and sometimes you also get a little in your eng.oil.Using a pressure tester on your coolant system will help to diognos the problem,if you have a leak some where it will not hold pressure.Sign,s of a bad waterpump are poor circulation and a antifreeze leak from a vent on the waterpump.Be sure the eng. is cool before working on it.Hope this was helpfull.

Posted on Mar 02, 2009

  • 272 Answers

SOURCE: 1999 Chevy Cavalier A/C blows hot air

More likely the recharge blew a o-ring and you have a leak. When your Cavalier was blowing hot air and a recharge fixed it that means it was low on freon which lets o-rings dry out, go back to the shop and have them leak test it. They use a pressurized dye to find the problem. If it's blowing it's not the cooling fan relay, they may have meant compressor relay but I'd have a leak test done first it's not expensive and easier that chasing unknown possibilities.

Posted on Jun 03, 2009

  • 6 Answers

SOURCE: Rear a/c not blowing cold, front works fine.

you may not have enough refrigerant. a low charge can cause the rear in this dual system to not work for beans. charge with a can of uv and find the leak. fix the leak. evac the system and recharge. i think you take 4 lbs, but check the accumulator sticker. you may want to just change the accum at the same time.

Posted on Jun 15, 2009

  • 12 Answers

SOURCE: 1997 buick lesabre HEATER PROBLEMS The fan

This could be several things. First I would check that the thermostat is not stuck open. This will condition will make the car run cold when it is cold outside.

If this is not the case........and I'm assuming you've already checked that the antifreeze is full, make sure that the heater valve is working. If it is frozen in place then it won't move and won't allow the warm water to circulate through the heater core.

I'm basing my answers on a standard Lesabre. Yours may not have the standard climate control.

Posted on Feb 15, 2010

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1 Answer

2002 chevy malibu heat not working


there is a seperator valve under the hood it mite be faulty. or could be ththe air seperaitor under the dash .this is the door that controlls where youre car draws air from..eather cold air or air heated by the heater core.wich may also be youre problem.there is multible things that could cause this problem .hope this helps you good luck

Mar 21, 2013 | 2002 Chevrolet Malibu

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1999 chevy silverado heater fan only blows cold air , both coolant lines in are hot


I like that you were knowledgeable to check both coolant lines tells me you are getting hot coolant through the heater core next thing to check will be the blend door on the inside of your vehicle. The blend door is a door that switches from cold air duct to heater duct depending on what you are using at the time. If it is stuck on the cold air duct you will not get any heat sometimes these doors are vacuum actuated and sometimes they are electrically actuated most the time you are able to see the movement of the motor from inside if you don't see any movement but you hear it move chances are it is the door blend I hope this helps.

Jan 10, 2013 | 1999 Chevrolet Silverado 1500

1 Answer

Why did the heat and a/c stop working in my 2001 chevy malibu


I am having the same issue. Just replaced the two hoses at the top of the recover tank (possible leak). While running at a stand still, the inside air was only blowing out cold. Let the car run for about 15 minutes to check for signs of leak and while we found none, inside heat never came on.
With in 15 seconds of pulling out of the garage, the heat decided to work

Dec 24, 2012 | 2001 Chevrolet Malibu

1 Answer

2004 CHEVY SUBURBAN FRONT A/C WORKS BUT THE REAR DOESN'T TURN ON


There is a blower motor control processor for the back blower - it takes input from the front control and the rear control and decides the fan speed. That processor could be faulty, or the blower motor, or a 30amp fuse in the engine compartment.
In the front system you have a controller and blend doors that direct air thru the heater core and evaporator. You would need to check the operation of those blend doors.

Aug 17, 2012 | 2004 Chevrolet Suburban

1 Answer

My 1999 Chevy Malibu runs hot? It started when it overheated. We changed the thermostat, then water pump, then temp sensor gauge and the temp gauge goes high but only when the heater stops blowing hot...


Air pockets will make the guage do that, and also cause your heat to come and go. Also, a poor radiator, as in rotting, or plugged up, will cause high temperature issues.

Sep 20, 2011 | 1999 Chevrolet Malibu

1 Answer

2005 MALIBU - HEATER BLOWS BUT NO HEAT


could be vaccum leak in the a/c panel where the flappers open and close to allow hot and cold air to blow

Jan 02, 2009 | 2005 Chevrolet Malibu

2 Answers

Heater


Try spinning the knob real fast in either direction. Sounds stupid but it worked for me.

Sep 27, 2008 | 2005 Chevrolet Malibu

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