Question about 2001 Oldsmobile Alero

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Heater in a 2001 olds alero blows cold air even after driving for an hour or even left on for long long time

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  • Oldsmobile Master
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Where is gauge low high?

Posted on Dec 08, 2016

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Posted on Jan 02, 2017

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dr_layinlow
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SOURCE: 2001 malibu-heater is blowing cold air

sounds like you have a bad temperature sensor in dash or the cable has eitehr broken or come off the heater switch under the dash!!

Posted on Dec 07, 2008

  • 68 Answers

SOURCE: Heater blows cold air

change the heater core

Posted on Dec 21, 2008

  • 1 Answer

SOURCE: Heater blows cold air when idle

Sounds like you may have a partially plugged heater core. You could flush this out separately, from flushing radiator & engine block. Diconnect heater hoses going to your heater core and clamp off, so not to loose coolant from engine. Now hook up separate hose to one side of heater core pipe and flush out with typical garden hose. Repeat procedure on both heater core inlets. Reconnect original heater hoses and test difference. You may have to add an additional litre of antifreeze. If this don't work i suggest changing heater core. Good luck.........Ron.

Posted on Jan 03, 2009

  • 1779 Answers

SOURCE: 2001 Dodge Caravan heater blows cold air when stopped

Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.

Posted on Dec 05, 2009

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SOURCE: Air conditioner charged won't blow cold air

It sounds like you either have bad controls or stuck dampers in your vents. The stuck dampers are usually caused by plant debris getting in to the air system.

Posted on Jun 07, 2010

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2001 olds alero. replaced thermostat last year. Heater still not blowing warm air just cold. AC works. Defrost blows cool air.


Heater core is bad. Part is about $40...labor is around $700. The entire dashboard has to be removed and this is a major time involved job. It takes 10 to 12 hours.

Aug 22, 2016 | 2001 Oldsmobile Alero

1 Answer

I have a 2002 Olds Alero GL my heater is not working and car overheats peoriodically losing antifreeze, please help freezing in Montana


For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----

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

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Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?

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

---------------------------

Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.

Jan 20, 2012 | 2002 Oldsmobile Alero

1 Answer

Heater is blowing cold air.


Start with checking coolant level, if low it will cause a no heat problem. If radiator coolant level is correct you might have a temperature door problem. The temerature door is located inside the HVAC module and is controlled by the temperature control knob on the dash board. The electric motor that moves the temp door may have failed.

Nov 13, 2011 | 2001 Oldsmobile Alero

1 Answer

I have a 2001 Oldsmobile Alero. For the second time in a year my car has been overheating. The first time the problem actually went away after a few days before I even had the pressure tested. This was...


First the reason the heater is not working is because there is air in the system and these engine are known to trap air.There is a bleeder at the top of thermostat housing to remove the air.Take the radiator cap off while the engine is off and cold and add coolant/water mixture till fluid streams from bleeder screw(will need to be removed) then tighten screw and install radiator cap.Let it idle and see if it over heats and pay attention to the cooling fan operation and heater operation.If it does not overheat after 20 minutes the take it for a drive and see if it overheats.I fit does not overheat idling but does overheat driving you have a bad radiator.Dexcool is great for pugging radiators and heater cores.It is possible to flush the radiators and fix sometimes but new ones are not that expensive.I would probaly replace.If it overheats idling and fans are working suspect a bad thermostat.Good Luck!

Apr 20, 2011 | 2001 Oldsmobile Alero

1 Answer

I have a 2001 dodge stratus and the heater only blowed cold aire now we changed the thermostat and it blows warm air when idling but when driving still blows cold need some help please


where did you buy your thermostat? if you bought a fail-safe style thermostat it could have been no good before you even put it in. also is your tempeture gauge coming up to operating temp?? if it isnt your thermostat may be stuck in the open position allowing the coolant to circulate freely and not actually warm up. i would also check the lines going into the heater core. if one line is hot and the other line is cold than your heater core is probably in need of a flush or replacement.

Dec 01, 2010 | 2001 Dodge Stratus

1 Answer

The A/C on my 2001 Old's Alero sometimes blows cold and and sometimes blows hot air. How can I fix this?


Sounds like the system needs to be recharged. I suggest taking it to a mechanic if you are not experienced.

Jun 25, 2009 | 2001 Oldsmobile Alero

1 Answer

Intermittant 1991 Corolla heater failure


remove heater core hose-jus 1, and blow air into it from an air compressor...WHATOUT for coolant,...ck'/flush/replace coolant--most the time this will work...try to buy only dealer or NAPA stats..kev-mn.

Dec 10, 2008 | 1997 Toyota Camry

1 Answer

2001 mazda 626 heater/temp gauge?


your head gaskets are bad.... This is a common plroblem wiht those symptoms.

Nov 22, 2008 | 2001 Mazda 626

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