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DLW · 03-02-2018, 12:43 AM

I heard the same thing. Some say it ran hotter with a regular non-bypass heater valve and some say no difference.

Seems if you want to use the bypass valve, you have to use a separate potentiometer like this one https://www.oldairproducts.com/produ...ve-kit-50-1555 to control heat.

Or you have to get clever with some wiring to make it work with the VA controls.
There is a version that works with vacuum, but don't want to bother with that one myself.

03-02-2018, 12:43 AM	#3
DLW Registered User Join Date: Apr 2014 Location: Union City, CA Posts: 384	Re: Heater core bypass I heard the same thing. Some say it ran hotter with a regular non-bypass heater valve and some say no difference. Seems if you want to use the bypass valve, you have to use a separate potentiometer like this one https://www.oldairproducts.com/produ...ve-kit-50-1555 to control heat. Or you have to get clever with some wiring to make it work with the VA controls. There is a version that works with vacuum, but don't want to bother with that one myself.