I have a 2005 Honda Pilot EX. We just replaced the alternator and radiator and now the heat controls will not work at all. They don’t even turn on. About a week ago, the issue started. First, it would blow heat from the back floor vents even with no controls on and now there is nothing. Cold air that I cannot shut off. I live in Colorado and the weather in December is not cool to have no heat. Also, the sun sensor isn’t working either. We’ve checked and replaced the fuses, tightened the heater control valve screw. Any other suggestions on what it might be? Other than the heater core. Any help is appreciated. TIA!!