Question about 1998 Ford Explorer

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I replaced the thermosat and flushed the heator core and still have no heat going though my explorer

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Sounds like the blend door motor has went out and is stuck at cool. these motors are notorious for going bad. if it has, the blend door won't turn to let heat in

Posted on Oct 03, 2009

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Have you made sure that all of the air is being bled off when you refill the system

It is worth loosening the return hose from the heater matrix when you top up the system to make sure the matrix is full of water

Posted on Oct 03, 2009

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92 pontiac gran prix heator core replacement


Go on U-tube and you can find several individuals that have videos that show step by step on how to change the heater core on your or any vehicle.

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Have you back flushed your coolant system? That is honestly the number one issue for most vehicles, is people not taking proper care and maintanence. But yes flush the system, and also check to make sure your getting good flow through your heater core if extremely blocked, you should replace it and also you should check your blend door actuator.

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My 99 GMC sonoma with a 2.2L is not warming up properly


Possibly plugged or inerporable heater core. Possibly heater core valve (this diverts hot air through your heater system) When you flushed the block, was there a lot of contaminant? 95% of the time, cold heat means thermostat. Also there are a lot of really cheap after market thermostats, you can buy one as low as $6.00. That being said, just because a thermo is new doesn't necessarily mean it opens/shuts when it should. You can look on You Tube on how to test one in your kitchen with boiling water,.

So three basic things affect interior heat temps. Thermostat, plugged heater core/.valve, and insufficient coolant or liquid to tranfser heat. If your interior coolant (engine temp) is working normally and your vehicle reaches operating tempature according to the needle, your thermosat is probably not the cause.

My bet is somehow, your heater core is plugged so that their is not enough "flow"

Feb 28, 2013 | 1999 GMC Sonoma

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I have a 1997 ford F150 4x4 king cab that has no heat. I have flushed the radiator, changed the heater core and flushed the heater hose. Still no heat.


Have any of you stopped to think that the Thermostadt may B bad especially after flushing the radiator replacing the heator cor Duh!!!!
Rplace the Thermostadt it will more then likley do the trick.
When the thermostadt goes out you will experiamce hot radiators no heat . ect.... first thing 95% of the people that experiance this replace the heator core first . no that you have elemanated the least obvious do the most

Oct 24, 2011 | 1997 Ford F150 Regular Cab

2 Answers

Runs hot and hearter not blowing hot air


a heater uses the temperature of the cars water, running threw a heat exchanger if the heater core has failed water will not circulate threw the engine properly this will and can cause over heating as well as nothing blowing from the heater. good luck.heater cores are generally inexpensive parts to replace.

last thing you can check if heater core is ok. is the thermostat.

Feb 18, 2010 | 1999 Pontiac Montana

1 Answer

The air from the heater turns cold when stopped at a stop light or idling. When I resume moving the warm air then returns.


it could be a few things . first have you burped the system?
second the heator core could be starting too plug up , try flushing the system, if that doesnt work then you will have too replace the heater core!!!!!

Dec 28, 2009 | 2003 Chevrolet Impala

2 Answers

Car will only have sometimes and i have replaced


If the car is not providing heat and thermostat is good, then your problem is a faulty heater core. Sometimes when heat cores wear out, they sometimes give off an anti-freeze smell.
You can go to autozone.com and register for full free online repair manual with everything you could need for your car.

Nov 15, 2009 | 1996 Ford Explorer

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The engine over heated replaced thermosat and still over heated. by passed the heater core and the engine doesn't over heat now.


SOUND LIKE HEATER COR IS PUGED SO YOU CAN TRY TO REVERS FLUSH IT WITH WATER HOSE CONNECTED TO HEATER HOSE IF THIS DOSE NOT WORK NEW HEATER CORE

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Heater don't heat


check to see if water is circulateing threw heator core while car is running with heat on feel the heator hoses were they go threw fire walland make sure they feel hot andbe careful you dont burn your self if they are cold replace heator control valve if hoses are hot then you have a blend door prollbem

Oct 07, 2008 | 1991 Cadillac DeVille

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