ACDelco 15 5536 Professional Heater Control Review

This heater control is a game changer for any automotive climate control system. It's easy to install and provides reliable performance. The temperature control is precise and the fan speed control offers a range of options to suit your needs. The only downside is that it may not be compatible with all automotive models. Overall, this is a top-of-the-line product that delivers on its promises of superior performance and functionality.

I installed this on my 2001 Jeep TJ to prevent coolant from entering the heater core in the cab. Due to age and wear and tear, the cold/hot air isolation door in my air mixer unit did not isolate heat well from the heater core during use of air conditioners and cabin fans. The heat coming out made the air conditioning less efficient, and the air coming out only with the fan was always warm, even on chilly days. I turn off the vacuum flask and use the lever to manually control the bypass when I…

94 A converted Gulfstream G20 van leaked antifreeze from under the heater core. It came from the valve stem of that little valve we have. It's not that bad to replace if you remove the AC battery tank first. PITA otherwise. Anyway, my air conditioner was completely empty, so no problem.