I have a 2008 Honda Pilot EX that, currently, has lukewarm heat, in the front and in the back. I’ve been reading a lot about that “magic screw” for the front, but that does not seem to be the case. The hose on both side of the mixing valve are hot to the touch. The difference is when it passed through the heater core. The hose to the heater core and the hose out from the heater core are different temperature. When I flush the heater core, it seems like the same amount of water I put in, comes out. That leaves me to not suspect the car’s heater core. The thing that I do know is this. There are air pockets in the system that I can not seem to get out. My question is this, will having air in the system cause both of my heaters, front and back, not work? Other than that, the car runs, idles, and drives fine. Thanks in advance .