Electronic Servo Controlled Bypass Heater Valve Kit fits 5/8" Heater Hose #50-1555

I recommend this to all Chevy square body (73-87) trucks without A/C. As many of your know, when the temp is set all the way to COLD, it will still blow heat on a hot summer day when you don't need it. This fixes the problem. Some people install manual valves in the heater hoses, but you can't because the engine has to have a continuous loop in that circuit or it will overheat. This valve will bypass the heater core and route the coolant back to the engine to facilitate the continuous loop when set to cool. Works great! Highly recommended.

I was concerned that the product was made out of plastic but when I received it I found that the construction was quite solid. I used this product as a work around for having to take apart me entire HVAC enclosure in my 2001 Dodge Ram 2500 5.6L Diesel Truck. Taking apart my HVAC unit would have required a complete dash board removal! This product has work with fantastic results ever since. I highly recommend this product !

Just what was needed for the aftermarket ac/hetater install for the Ls engine

If you're looking to competently divert hot coolant from the heater core save your money. This valve still allows coolant to enter the core. I emptied mine and closed valve. It still filled it and allowed heat transfer into the box.

Happy to find this electronic bypass heater valve for my truck a/c old air project for a good price and no delivery fee

Worked perfectly, keeps hot water out of my heater ecore, keeps water circulating to my water pump and allows my AC to cool better. Ls1 swapped 1985 IROC-Z.

What a great product !!! Works wonderful and just like stated. Wow !!

The electronic heater bypass works perfectly! Clean and compact.