How to turn your heater core off and on in the cab.

[Waterloo]

(05-17-2019 )dhirocz Wrote:  I like this idea. I was considering this to help out my A/C during the hottest months. My A/C box doesnt bypass the core all the way when set on max cool, so it's marginal at best, even though the whole A/C just got overhauled. Definitely better than before though.

I was considering ball valves to shut off the core, one or two. I carry fittings to bypass if needed...I had to bypass a hose today as a matter of fact down by the APU outside of Mcdonough.

Well, I just installed, so I have no clue on longevity, but I think it will be fine for a few years. It was only $26 and bolted right on, the switches, you can get at any auto parts store, I found some locally, but bought 5 or 6 on Amazon for the same price as one auto store switch. I will let everyone know how this works out, I think this will be fine in the long run.