Question about 2005 Ford Explorer
I replaced water pump thermostat housing heater core valve flushed heater core
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Posted on Jan 02, 2017
SOURCE: 1999 Ford Taurus, no heat.
Try checking the two pipes that go into and come out of the heater matrix, is one of them hot? if it is there is an air lock within the matrix, Also is the thermostat opening fully? Sorry i know you said you have changed it twice already but take it out check settings when it should open and close, then boil some water and test the thermostat
Posted on Dec 30, 2009
I assume you actually touched the water hoses to make sure they are gotting hot?
But hot water to the heater hoses, does not mean the heater valve is opening and letting into the heater core. Most valves are operated by a vacuum servo these days, although some still use a cable. Have someone operate the lever back and forth, while you watch to see if the valve is getting movement.
If not, it could be the cable, or it could be lack of vacuum to the servo, or it could be the servo is leaking, or it could be you have a computerized climate control that is trying to regulate temperature and not working. The valve is usually out in the engine compartment, because it still get hot even when closed, and you don't want that inside the car in the summer. So you should be able to see if it is cable or vacuum. And you should be able to manually move the cable, or supply direct vaccum to the servo. If you then get heat, you know what it is then.
If you don't get heat even with the valve open, there could also be a temperature regulator. That would be likely under the dash, and is designed to allow exact temperature modualtion, like when you want one side different from the other. And then you run into computer controls again, where I don't have the model experience to help.
Posted on Mar 03, 2010
Not an expert by any means, but i know my ranger.. I had a small leak at the top of my radiator that still cooled the engine but didnt have enough pressure to get to the heater. The heater hoses travel up over the engine and just were not gettin anything to my heater core. That or make sure the heater control valve is operating.
Posted on Apr 16, 2010
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