Join Date: Mar 2010
Location: Stockbridge, Mi.
Thanked 7 Times in 6 Posts
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Feedback Score: 8 reviews
The only time the heater valve is closed is when you select Max AC.
So unless you always use Max AC you will still have coolant circulating through the heater core (and IPR HF filter) even when you have the normal AC on full cold.
2006 F-450 XLT 4x4 Auto 4.30L Alcoa 19.5" 16,000 GVWR
Kelderman 4-Link/4-Bag Rear Suspension, Lariat Seats, '08 Console, '11 Mirrors, CTS, SCT X3
ARP's w/OEM HG, BPD 6ph FICM @ 58v, BPD Oil Cooler w/stat, Ported Intake, 185 amp Alt
P-Max w/WPE billet wheel, Spearco IC, 4" Banks Exhaust, Shell T6, Zerex EC-1, Oil bypass filter
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