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Old 08-29-2013, 09:46 AM   #49
andrew20195
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Join Date: Mar 2013
Drives: 2013 Subaru BRZ
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Quote:
Originally Posted by fistpoint View Post
Is it really that simple of an explanation? So those of us who have not experienced this on our previous vehicles must have had heater valves?

Is this something that can be added or would that constitute a whole new system?
Subaru uses the heater core as a coolant bypass until the thermostat opens, so you'd have to plumb a bypass as well. Other than that, a heater valve would be fairly easy to add. Some manufacturers use cable controls, some use electric. You'd have to add a manual control for it since the HVAC isn't designed with a heater valve.

I should note that it hasn't been cool or cold since I got my BRZ. I'll make sure to check my car and see what I find when it does.
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