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Heater blows cold air when idling - Civic Honda Cars & Trucks

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Low coolant level or blockage in heater core

Posted on Apr 30, 2016

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Posted on Jan 02, 2017

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SOURCE: Heater blows cold air

change the heater core

Posted on Dec 21, 2008

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SOURCE: Heater blows cold air unless accelerating

1.maybe your thermostat is no opening or closing.
2. not enough Ant-Freeze
3. Low on water

With more details on the engine i may be able to help you more. for example what is the temp reading after it idles awhile or does it blow warmewr when driving ?

Posted on Dec 30, 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

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SOURCE: heater blowing cold air

squeeze the hoses to get any air bubbles out and refill coolant as necesary. are you sure you put thermostat in the right way? may be backwards. also may be your sensor.

Posted on Jan 04, 2009

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SOURCE: heater blows cold air

I had the same problem with the heater only working when accellerating. Found the overflow tank pick up tube was kinked. This of course made my coolant level low. So when the cars hot the coolant would push into the overflow, but when the car cooled the kink would prevent it from flowing back to the radiator.

Posted on Sep 04, 2011

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Blows cold air turn heat on


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    07 Tucson heater blowing cold air - Hyundai Forum - Hyundai ...

    www.hyundaiforum.com > ... > Vehicle Line Up > Hyundai Tucson
    Dec 16, 2009 - I have a 2007 Tucson, when you turn on the heater it only blows hot air... Join Date: May 2005 ... a low coolant level will exhibit the first stated symptoms of no heat/low heat at idle and increased heat at cruise due to an air ...

    Denlors Auto Blog » Blog Archive » Car Heater Blows Cold ...

    www.denlorstools.com/autoblog/.../car-heater-blows-cold-auto-service-ti...
    Oct 10, 2009 - When a car heater blows cold air, there are several possibilities that should ...... On my Dodge Neon when I turn on the heat it blows out cold air.

    Heater blows only cool air...even w/ defroster on : Buick ...

    repairpal.com > Problems > Buick > LeSabre
    ... Cadillac, Chevrolet, Chrysler, Dodge, FIAT, Ford, Geo, GMC, Honda, Hummer,Hyundai, Infiniti, Isuzu, Jaguar ... I'll turn up the temp on the dual control to get heat,

Jan 28, 2016 | 2005 Hyundai Tucson

2 Answers

Heater temp on high only bows luke warm air after driving. A/C works just fine.Plenty of cold air from it


heater blows cold air idle chrysler 300 Questions & Answers ...

www.fixya.com > Forum > Tags
Find solutions to your heater blows cold air idle chrysler 300 question. ... blow warmair for a few mins then back to luke warm. i replaced thermostat ... HEAT BLOWSCOLD AIR WHEN IDLING ONLY GETS HOT WHEN START DRIVING ... About 15 minutes after driving the diver side vents start blowing straight cold air but the ...

Heater only works when pressing the gas? - DoItYourself.com ...

www.doityourself.com/...repairs.../459521-heater-only-works-when-pres...
Nov 3, 2011 - When I press the gas, the air from the vents is nice and hot. .... So am Idriving a car with a ton of problems, or could the power steering ... Just anotherquestion, when warmed up does the engine temperature ... When the heater is on and I'm not pressing the gas pedal, luke warm air blows from the vents.

Heater blows cool air when stopped and warm air while ...

https://www.reddit.com/.../heater_blows_cool_air_when_stopped_...

RedditFeb 12, 2014 - Heater blows cool air when stopped and warm air while driving 2008 Kia Spectra (self. ... just fine but appears to blow cool air when I was stopped at a stoplight. ... My temp gauge would also be pegged high when at idle / low RPM. ...thermostat only blocks coolant going to the radiator, and the heater core, ...Missing: 300m ‎luke

Why is My Car AC Blowing Hot Air? - BlueDevil Products

gobdp.com/blog/car-ac-blowing-hot-air/

Jan 27, 2016 | 2000 Chrysler 300M

1 Answer

There is no heat from heater at engine idle speed.


I have to believe that your thermostat is still sticking....replace it and you problem should go away. Relatively inexpensive fix.

Jan 23, 2013 | Cars & Trucks

1 Answer

The heater in my 1999 Land Rover Discovery Series 1 won't blow cold.


As per your problem mentioned.There are few solved help links to troubleshoot these problems.Go through the list and Click the link below:----
Air conditioner blows air but not cold air http://repairhelpcenter.blogspot.in/2012/07/air-conditioner-blows-air-but-not-cold.html

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Car overheats and Air blows hot at idle? http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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Heater blows cold? http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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Heat blows cold on drivers side and hot on passenger side? http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html---------- Hot air on the driver's side vents only? http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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2005 Chrysler PT Cruiser: A/C Blows Warm? http://whoisbyme.blogspot.in/2012/06/2005-chrysler-pt-cruiser-ac-blows-warm.html

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1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold? http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

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No heat, blower blows only cold? http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

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These will help.
Thanks.

Nov 22, 2012 | Cars & Trucks

1 Answer

Heater blows cold air at idle


It sounds like your heater valve may be sticking. Try watching the valve, which is located behind the engine (two tubes etc
if you need a VAG diagnostic tool you can click here: VAG diagnostic tool

Nov 09, 2012 | Cars & Trucks

2 Answers

Why would my heater blow out cool air when sitting still and then hot air when going down the road and then it's not all that hot


Try flushing or blowing high pressure air through the heater core lines. its sludge build up and need to be flushed through heater core only. check antifreeze fluid level. only put in straight antifreeze, do not mix. most people do not know what mixture should be, so be safe and add straight, it will not hurt it, i run 100% straight antifreeze and never had a problem or worry about it ever freezing and cracking my block, heads or radiator cracking.

Jan 29, 2012 | 2001 Daewoo Nubira

3 Answers

2002 Dodge Ram 1500 - The heater blows cold air when it sits at idle but blows warm air when it is being driven down the road. A/C does the opposite, doesn't blow cold air when diling, but I figured this...


the heater blowing cold at an Idle and warm while driving it,is usually low coolant in the radiator,remove the radiator cap when engine is cold,fill to the top,and fill overflow tank to full,if that doesn't take care of it,check the heater hoses at an idle and see if they are both the same temp,it might be a water pump not doing its job.

Jan 11, 2010 | 2001 Dodge Ram 1500 Truck 2WD

2 Answers

When driving, heater blows warm air. When idling, cold air.


check your anti-freeze level, I'd bet that you're a little bit low!

Dec 15, 2009 | 2001 Mazda MPV

2 Answers

Blowing cold air when idling


temp should rise while idling unless thermostat is stuck open and not letting heat build up

Nov 11, 2009 | 2006 Chevrolet Impala

2 Answers

2006 chvy impala when idling dont blow hot air


1 Inspect Cooling System Mix Coolant level low or flow is restricted. grey_line.gif 2 Inspect Thermostat Thermostat stuck closed grey_line.gif 3 Inspect Heater Control Valve Leaking or defective heater control valve. here something to help u

Here to help Shaun

Nov 23, 2008 | 2000 Chevrolet Impala

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