Question about 2003 Ford Expedition

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HEAT PROBLEM Did you have any luck solving your problem?

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Replaced the blend door motor.

Posted on Nov 04, 2008

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2005 chevy impala passenger side blows heat out continuously, driver's side works fine with heater & AC


You may find a reset will solve this annoying problem. The problem you have is the GM heater control unit has lost it's calibration, which can happen from time to time. The way to reset it is, start your car and turn your heater off, and shut off the car, pull out the keys. Then with vehicle off, disconnect the battery, (or batteries if it has two). Let sit for 10 minutes, then re-connect battery. Get in and start the engine, DON'T touch anything, let the heater control unit re-calibrate for at least 40 seconds, (by the clock), then try turning on the heater.
Good luck!

Jul 18, 2013 | Cars & Trucks

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While driving my 1998 Mercury Sable with the heat on. It will start out with really warm heat and then 40 seconds later it willstart to cool down. If I turn off the heat and wait wait a minute it will


This sounds like a classic problem with the heater core. The heater core is like a small radiator that is located under the dash (likely). If the vehicle hasn't been maintained properly with regard to the coolant, the heater core can become clogged over time and need to be replaced. Years ago, there was also a problem with mixing the green and red coolant. This caused the fluid to gel especially in the smaller passages of the radiator and the heater core. Did you install an in-line port when you flushed the system? A little household water pressure flowing thru the system might help blow the clog out. Other than that, replacing the heater core Will likely solve the problem. Good luck!

Jan 15, 2012 | 1998 Mercury Sable

1 Answer

I have a 1991 camaro.The air or heat doesn't come out through the front vent when switch to vent control.It only come out through the dashboard to defrost the windshield..I have bought and install a...


It is the vent control. It is located on the passenger side behind the dash. It is vacuum controlled. It can fail and not let you change the vent positions.

Good Luck!

May 09, 2011 | Chevrolet Camaro Cars & Trucks

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1999 denali dummy gauge turned on, vehicleoverheating gauge started to show hot, attempted to turn heater on to releave heating but heater blew cold air only.


Your coolant is to low to allow heating...not water to heat up or cool the engine. Check the coolant resevior/radiator after the engine is cooled and then refill with anti-freeze. this should solve the problem...if not, you have a sticking thermostat or a clogged radiator. Good luck

Feb 11, 2011 | 1999 GMC Denali

1 Answer

I have a 1990 subaru loyal, it runs fine but there is a problem with the heat. the heat coming from the heater core isnt very hot, its barely warm. the car gets up to running temp and doesnt overheat. when...


A clog can cause low heater perforance in the winter. I had a 1990 Cadillac Deville that had cold air blowing in the middle of winter, and had the system flushed and that solved the problem.

One can feel the two heater tubes at the firewall leading to the heater core to verify whether or not the antifreeze/coolant is getting hot at the heater core.

Good luck on this repair.

Dec 18, 2010 | 1993 Subaru Loyale

1 Answer

1995 discovery- no heat - blower works- engine temp ok


Coolant level was down by 2 litres. Topping it off solved the heat problem. I guess the heat core is plumbed to the coolant system, so low coolant affects the heat inside the cab.

Jan 06, 2010 | 1999 Land Rover Discovery

1 Answer

Fan blows cold air no heat


Check your radiator fluid to make sure it is up to the right level on the overflow tank. If it's low, add up to the level and let the car run to work out the air bubbles and add more until it stays where it should be. Check your heater.... If it heats now, problem solved. If that doesn't fix it then I would look at replacing the thermostat.

both are inexpensive fixes. Good Luck

Oct 08, 2009 | 1998 Oldsmobile Bravada

1 Answer

Fuel pump dose not stop


Check the relay to make sure the inside contacts haven't fused themselves together. When there is an excessive amount of heat generated, they can sometimes weld together. If you change the relay, it should solve the problem immediately. Hope this helps you. Let me know please. Thanks for using FIX-YA. Good luck.

May 06, 2009 | 1993 Ford F150 SuperCab

1 Answer

No heat


There is a heater control valve mounted on fire wall with a vacuum house connected to it, most of the time nissan heating problems is due to this valve being bad. You can open valve manually by moving lever to open position. and hold if heat come up problem solved. If not get back to me and I will be more than happy to help. Good Luck

Dec 12, 2008 | 1995 Nissan Maxima

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