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My heater in my crown victory 2003 won't come on even when my climate control is at 90 it just blows cold air why is doing that

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The heater core can be plugged with rust, the vacuum hose going from the intake manifold of the engine to the controls can be leaking or come off its connection port or the electronics and temp sensors can be faulty.

Posted on Dec 04, 2016

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Check blend door --control valve or blocked heater core

Posted on Dec 04, 2016

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NO HEAT. A/C works fine. Air blows but no warmth. blows cold air for front defog and cold air blows when temp cranked high 1-5


warmth comes from the heater in the car
if it is climate control check the climate control module
check for heater control in the vent settings as the hot water tap may not be turning on

Sep 20, 2015 | Pontiac Grand Prix Cars & Trucks

1 Answer

2003 chevy 1500 ss only blows cold air no heat


Dual climate control on these is not a manual valve adjuster. It is done electronicly with a electric motor on a valve instead of ran by a maual cable. Find this and check the plug for a 12 volt signal. If you are getting a signal replace the valve, if not it could be a blown fuse, cut wire, or a bad climate contol switch.

Apr 13, 2014 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

2003 525i bmw heater will only blow cold air


Check climate control re circulation divider door to heat exchanger from heater core under dash passenger side .

Jan 22, 2013 | 2003 BMW 525i

1 Answer

My climate control only blows out cold air but the rear climate control works as it should


Could be the controller or a faulty blend door.
The blend doors direct air thru the heater core and evaporator along with the vents. The controller uses electric motors to change the direction of air flow.

Sep 28, 2012 | 1999 GMC Suburban

2 Answers

Where is the blend door actuator located on 03 Hummer h2. Driver side blows cold, passenger side blows hot


They are not vac on the h2. there is 2 for temp control, one for recirc and one for blend. check the hummer forum as there is a great read for it there. the driver side actuator is really ez as it's under the glovebox, 20 min fix. the rest take removing the whole dash but it's not that tough.

Jan 10, 2012 | 2003 Hummer H2

1 Answer

2003 Mitsubishi Eclipse Spyder, can't figure out why the heater blows cold air on the drivers side and warm air on the passenger side? A/C works great. I have flushed the heater core and it seems to flow...


There are a couple of possibilites. 1 Is your vehicle equipped with seperate climate controls for the driver and passenger, if so your warm/cold air motor door on the drivers side is malfunctioning. This is located under the dash.2 Your climate controls on your dash are not working properly. Hope this helps.


Please take a moment and rate my answer..........Thanks

Dec 01, 2010 | 2003 Mitsubishi Eclipse Spyder

1 Answer

I NEED TO FIND THE KEYLESS ENTRY CODE & heat blows cold intermitt


entry code need to notify a ford dealer either air control baffle stuck or not responding or heat control at heater core not opening / responding

Nov 18, 2009 | 2004 Ford Crown Victoria

1 Answer

Heater wont blow hot air in my 1998 Lincoln Navigator


the computer that controls the deflector motor are not responding and opening the door for heat, I'm sure you have climate control,check the temp setting sensor to the computer input first

Nov 01, 2009 | 1998 Lincoln Navigator

1 Answer

02 Jaguar S Type - Heater blowing cold air


Has the vehicle overheated recently, if not there is a failure of the Coolant from engine valve controller, that measures flow through the Heater Matrix. Come back with more, as necessary.
Regards,DT

Aug 29, 2009 | 2003 Jaguar S-Type

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