Heater control valve

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Oct 21, 2011 | 01:57 PM

hodges710

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From: New Hampshire

Heater control valve

Where is the heater control valve at on a 1998 Expedition (4.6). thanks

Oct 21, 2011 | 03:17 PM

pdqford

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From: Central NYS

There's a heater control valve?

Oct 21, 2011 | 04:29 PM

TerryB99

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I do not think most Ford's have one. I think coolant flows thru the heater core all the time.

Maybe better than having coolant just sit in the heater core all during warmer months

Oct 21, 2011 | 04:29 PM

Moto Mel

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From: Chesapeake, Va.

I don't believe there is a control valve per se.

The engine coolant is always circulating throughout the system and the infamous blend door controls the heat or cooling you get in the cabin of the truck. I believe there is a vacuum operated valve on the F250's and Excursions, but not sure. You may have to repair the blend door and there are many posts regarding this.

Oct 22, 2011 | 05:56 AM

hodges710

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From: New Hampshire

Thanks for the replies, I have found outt hat there is no HCV and I have already visualy inspected the blend door and it works good. I believe i am going to think i have a clogged heater core and/or line. thanks

Oct 22, 2011 | 07:50 AM

Moto Mel

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From: Chesapeake, Va.

You might try reverse flushing the heater core to clear it. Have you ever used any kind of radiator stop leak stuff in your truck?

Oct 22, 2011 | 08:32 AM

hodges710

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From: New Hampshire

Quote:

Originally Posted by Moto Mel

You might try reverse flushing the heater core to clear it. Have you ever used any kind of radiator stop leak stuff in your truck?

no I have not use any kind of stuff like that, I will do the flushing and see what comes of it. With the rear unit, is there anything to do or should i flush the whole deal for the heat in rear is alittle warmer than front but nothing you would want to be in a long time in the winter in the new england area. thanks