Join Date: Aug 2010
Location: Sassamansville, Pa
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I don't know much about AC, but my experience has been when I removed the heater core hose shut off valve, my AC wasn't as cool.
I removed the valve to "t" in the coolant filter.
Some truck came with this valve, some didn't. When AC controls are switched to MAX AC, the vacuum operated valve closes off hot coolant to the heater core. This prevents residual heat from being mixed with the cool AC air.
If you have one of these valve, be sure the vacuum hose is connected and/or the valve is working properly.
2004 F350 CC DRW King Ranch
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