Heater Control Valve

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Apr 27, 2014 | 11:23 AM

Michael9280

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Joined: Sep 2012

Posts: 15

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From: Long Island NY

Heater Control Valve

I have a 2001 ford f150 4.2L 2wd. I'm looking for the vacuum diagram for the truck, mostly the vacuum line going to the heater control valve. My truck doesn't have a heater control valve under the hood. causing no heat in the winter. I replaced everything else in the coolant system. Instead of the control valve it has just a coupler in place. I don't know where the vacuum line is going to the heater control valve. I looked everywhere under the hood for the vacuum line.

Apr 28, 2014 | 10:44 AM

rocknrod

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Joined: Jul 2007

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If you look near the battery toward the firewall there is a vacuum line that goes into the firewall next to the starter solenoid. I think that is it, from the intake. T's off to behind the battery to a canister.