Question about 2005 Chevrolet Malibu

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2005 MALIBU - HEATER BLOWS BUT NO HEAT

Heater fan works - temp guage in mid (normal) range - previously got hot air within 10 minutes or less.

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  • schnebelt Jan 02, 2009

    new car - 27,000 miles - no accidents

  • schnebelt Jan 03, 2009

    Thanks, I will bring this up to my mechanic.

    I was hoping for something like maybe a fuse or thermostat (if it has one) . Obviously, I know very little about newer autos, with all the electronics, etc......But again, thanks for ur input.

  • sbusby2 May 11, 2010

    did you buy this car new or used

  • Anonymous Mar 16, 2014

    No heat blowing

  • Anonymous Mar 25, 2014

    drops temp and fans run

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

Posted on Jan 03, 2009

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2000 caddy Seville ...after starting and engine warm turn on the heater and it blows cold air. Fan works / waiting for hot air and then all the sudden it kicks in. Engine at normal temp


Low coolant, if there is an air pocket in the engine it will make it to the heater core. Once there , the air coming out is cold/cool. Once the coolant fills the heater core, it gets hot. If the coolant is fine hot or cold, then have the HVAC system scanned.

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2002 gmc yukon xl rear heat blows heat front blows cold air


Try to back wash the heater core first if it doesnt work then its clogged up try to turn the heater on the front with the heater off for the back keep an eye on the temp guage if it goes up than normal then its clogged....

Fyi u have to run the engine for awhile with the heater fan on

Feb 28, 2015 | 2002 GMC Yukon XL

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Heater doesnt work


To troubleshoot this types of problem,click the link below :---
Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html

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

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http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html

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This will help.Thanks.

Mar 27, 2012 | 1994 Volvo 960

1 Answer

I just bought a 1994 Subaru Loyale, the heat is not very hot. The fan blows but the air is warm not hot. The previous owner told me when he replaced the water pump he also put a new 195 degree...


very important to have proper coolant solution.50/50..too much antifreeze will make heater act up.antifreeze tester will eliminate that.warm engine and check both heater hose if they are the same tempature.if not remove both hoses and garden hose through the
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Feb 12, 2011 | 1994 Subaru Loyale

2 Answers

The heater only blows cold air,the radiator is full,thermastat is working and the engine temp is within normal ranges.


I've had this problem. 2000 GMC uses a closed coolant system. Meaning takes and returns coolant from and to the Reserve Bottle and has little air in the engine and heater systems.
If everything appears ok but no heat. "Air Lock" is the most likely cause. (With interior heater set to full heat) Solution; 1. Make sure water pump works. 2. Drain about 1/2 engine coolant into container. 3 Remove both heater hoses from engine side and flush heater core in both directs through heater hoses with garden hose. 4. Reattach heater hoses in correct locations. 4. Refill engine with coolant. 5 Start engine and run for 2 min., use caution when topping up coolant.
6. Most 2000 GMC have twist off caps with plugs located mid way on heater hoses. with engine cold, start engine these caps may be loosened to allow trapped air to escape. Do not attempt with engine hot due to hot coolant injuries. This may take more than one attempt to remove all air from heat system. 7. Lastly most 2000 GMC water pumps have a bleeder plug,( 3/8" square driver plug) located on the water pump. With egine cold this plug should be removed to remove any air. Reinstall plug with thread sealant.
Hope this helps cheers

Dec 09, 2010 | 2000 GMC Jimmy

3 Answers

My 2005 Jeep Liberty will not blow heat through heater ducts. Fan works fine but blows only cold air. Any idea what the problem is?


heater valve if you have 1 ,or temp control actuator which is under the dash and takes hours to replace!

Jan 30, 2010 | 2006 Jeep Liberty

2 Answers

2000 Mercury Villager w/ heat, no heat, & temp gauge flux


you have air trapped in the system.
Park facing uphill (on car ramps if you have them).
with cold engine, remove radaitor cap and fill radiator.
Fill reservoir.
leave cap on loose.
Turn on heater.
start engine and run until upper radiator hose gets hot (meaning thermostat has opened).
Check coolant level and top off. Repeat until temp gauage reads normal and heat is coming from heater ducts.

go here for villager/quest help.

http://autos.groups.yahoo.com/group/villagerquest/

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4 Answers

Heater blowing cold air


My 2005 Nissan Sentra 1.8s with 55,000 mi. blows cold air from the heater. Coolant not circulating in engine. Lower hose stays cool to touch. Both heater hoses cold. Changed thermostat - didn't fix it. Coolant not leaking or dirty. None in oil - no oil in radiator. Changed worn water pump belt - pump spins freely with no noise or resistance. Cooling fans come on after warm-up. Temperature gauge stays in normal range then jumps to hot and back again. Coolant good to 10 below - didn't freeze here yet. No other problems or repairs to car. Afraid to drive and make worse. Help!

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2 Answers

Heater temperature does not stay hot


1st thing to check is the coolant level. I've seen cars w/ no heat, or very little quite a few times caused by low level in cooling system--not low enough to overheat the engine, but enough that circulation of coolant to heater core is affected (no or little hot coolant circulation to heater core=no or little heat),
Is the engine temp gauge in the normal range? If it's in the low range, engine not reaching operating temp. it could be caused by a thermostat stuck in the open position (or no thermostat, sometimes people remove them when their car overheats, and this should not be done).
Here's how the system works: the heater 'box' contains a heater core (a mini radiator) w/ a fan and hoses connecting the heater core to the engine cooling system. Hot engine coolant is circulated thru the heater core. When u activate the heat switch on the dash, a flap door opens to expose the heater box to the passenger compartment. The fan switch on the dash activates the fan, which blows air thru the core, which heats the air.
So, if it's not the coolant level at the radiator, the fan is obviously working, the engine is reaching operating temperature, I would say it must be the flap door that opens, isn't opening fully, or isn't staying open. It could be the dash switch is defective (not supplying current to open flap door) or less likely the flap door is binding somehow. Hope it's as simple as correcting coolant level, if not, the dash switch control should be checked

Oct 22, 2008 | 2004 Dodge Caravan

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