I can't fiqure out what is going on I've searched the board and still can't fiqure it out. My Blower is constantly on high and cannot be adjusted and my heater is blowing cold it sometimes starts working after about 20 minutes. My coolant level is OK and I replaced the thermostat and it made no difference. The testbook symbol is on, so what do you think? BTW there is no water in the footwells.