Question about 2007 Ford Expedition EL XLT
Could be the diverter valve. It's the one located near the firewall in the engine bay. the valve is in-line on one of the two coolant hoses that run through the firewall. Have a helper rotate the temperature knob back and forth, with the ignition turned on, and you watch to see if the valve is being adjusted. I'm guessing it isn't. Best of luck!
Posted on Jan 31, 2010
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Posted on Jan 02, 2017
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