I'm in the final stages of getting my A/C working again and am checking everything to make sure it's operating properly. Just had the HVAC control assembly out to replace the fan switches (both of which went bad) and hooked up the vacuum lines again. With the water drained from the system I took a MityVac to the hot water control valve to figure what vacuum would cause it to fully close. I also bought a replacement heater control valve and both the new one and the original close at the same setting. With the left control levers in the up position (OFF) vacuum is normally applied to the kick panel door and it is open. Vacuum is simultaneously applied to the hot water heater control valve and it is fully closed - blocking off any hot water to the core. When I move the left control lever down to VENT, the kick panel vent door closes immediately. At Max A/C the heater control valve is still closed,as is the kick panel door, but moving the lever down to NORM (normal A/C?) the hot water heater control valve opens and the kick panel door is still closed. Seems to me that Normal A/C should keep the hot water control valve fully closed. I would also think that Max A/C would recirculate the interior air by pulling it back in through that kick panel door. Obviously it can't do that if the door is closed. I understand the hot water valve opening when the left lever is set at HEAT but it seems to me it's opening too soon. Maybe my vacuum switch isn't working properly either. Is my kick panel door working properly and if it is then how does the air get recirculated?