Car runs at normal operating temp. A couple of years back I flushed the radiator, and ever since my heater will not put out any heat. If I don't run the fan for awhile it will put out some heat when I turn the fan on, but cools down quickly and then just blows out cool air. Could it be an airlock and if so how do I get it out. I have also been told that there is a relay under the hood or dash that controls the flow of water through the heater core. What do you think?
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Re: Heater in 1998 Ford Taurus
When u flushed the radiator, what did u find? Was the old coolant dirty, rusty, sediment in it? What u describe sounds like the core is plugged up w/ junk. This would be my 1st choice of the problem, especially if the coolant was rusty, cruddy, as described above. It wouldn't be an air pocket (after a couple of years). Some cars do have a valve that opens and closes to allow the hot coolant into the core for heat, or a flap door that opens to allow the fan to blow air thru the core for heat, but the fact that this started when u flushed the system leads me to believe it's a plugged up core. U could try to flush the system again, make sure the heat is on when u do, so u have circulation tthru the core to help flush it out. let me know how u make out. good luck!
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These taurus' have a notorious problem with the blend door actuator(controls hot and cold air mixture) failing.This is located in the cab of the car underneath the dash right in the center.This is not a diy project unless you have fairly extensive mechanical background.What you can check with ease though is to make sure that your coolant is full, this can cause a no heat condition.Also get your car up to normal operating temp and place your hands on the inlet and outlet if the heater core hoses, on the engine side of the firewall, and make sure both hoses are hot, if they are both hot then it is a blend door issue, if not then you have a restricted heater core, you can back flush your heater core by removing the hoses and placing a garden hose to either side and flushing it thru. I hope i could help....rate me accordingly.Thanks!!!
at the bottem on the left or the side there is a small key like screw ( righty tighty lefty lucy } then u must remove the radiator cap and also remove the themastate be sure to attach the therma housing and hose and unatch it at the top of the radiator the put water hose in the open cap area and flush for 20 mins turn on engine and let run for 2 min and repeat flushing untill all antifrez desapears. be sure to put every back tack pitchures as you remove so to put back the same way it might be good to get new thermastate
You might have to purge the coolent system cause when you change stuff like that you normally have to bleed the the colent system. So what you have to do is run the car untill your temp gets to 195 degrees the cut the car off and let the coolent drain down and then refill and geep doing that untill you have heat.
If no coolant flowing through the heater core then ther is no heat. There are 2 possible root causes needed to check out:
1- THE VALVE TO CONTROL THE COOLANT FLOWING TO THE HEATER CORE IS NOT OPENING AS DESIRED.
2- THE HEATER CORE GOT CLOGGED UP AND NEED TO BE FLUSHED.
i would suspect a couple things. if the engine is not running at correct temp. 195 degrees or so. replace thermostat and recheck. if engine is running at normal temp and is not overheating at all. would suggest flushing heater core to see if helps. if not then heater core replacement may be necessary these ford cars and trucks are notorious for poor cooling/heating systems due to the coolant used
I had the same problem on my '99 Taurus and got it fixed today. I had the heater core back flushed. The water was just filthy. I haven't had heat in my car for a couple of years like I have now. My mechanic recommended that I come back in a week and have it flushed again.