Greetings, I’ve been dealing with the annual issue of losing hot air to my 2007 Pilot’s front compartment vents until I tighten the screw on top of the heater valve, maybe a quarter turn. This always fixes the problem until the following winter. Hot air to the rear compartment always worked. After 10 years of doing this, the screw rusted and no longer moved. I had a mechanic look into it, who replaced the valve but now it’s only lukewarm. Any ideas? Thanks.