Heater Core Shut Off Valve
#1
Heater Core Shut Off Valve
I added a manual heater shut off valve the prevents hot coolant from entering the heater core on my Mustang, and have been thinking about doing the same thing in the F150. Has anyone done this on their truck? If so what style did you use and where did you install it? The way I did it in the Mustang will not work on the truck.
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#10
I could be wrong but the heater core shut off is just a Band-Aid fix for an inproperly adjusted or leaking blend door in my experience. If the hot/cold blend door is working properly the shut off will make very little difference, no air should go though the heater core on the cold setting and the only small difference will be slightly less heat in the firewall area but this is negligible as it's already inches away from the engine.
#11
Join Date: Feb 2002
Location: Greater Austin, Texas
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Did the vent blow cooler air at least, when not using AC?
#12
I could be wrong but the heater core shut off is just a Band-Aid fix for an inproperly adjusted or leaking blend door in my experience. If the hot/cold blend door is working properly the shut off will make very little difference, no air should go though the heater core on the cold setting and the only small difference will be slightly less heat in the firewall area but this is negligible as it's already inches away from the engine.
#13
The heater core is in the AC/heater airbox in the engine compartment. It might radiate some heat through that but it's also inches away from the Engine. Van's and SUV's with rear climate control do have heater cores inside the cab.
#14
We can solve this real quick... take an IR thermometer and scan the outside of the heater plenum behind the glovebox and take note of the surface temperature with and without coolant flow going to the heater core. I bet it does not make much difference.
Agreed. If your blend door works right then you shouldn't have any air going thru the heater core anyway.
#15
The box is in the engine bay, but the core is in the cab. The ports from it go through the firewall.