Thread: 1999 F-150 XLT 4X4 No Heat
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Old 09-27-2002, 09:10 AM
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1999 F-150 XLT 4X4 No Heat
[updated:LAST EDITED ON 27-Sep-02 AT 10:16 AM (EST)]Check your Gate valve out by the Fire wall. It's inline with one of the Heater hoses. Or the Dash control unit has something wrong.
It sounds like your gate valve is not opening to let the hot antifreeze in to the heater core.
 
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