Hello Scotty i have a 2002 Toyota Camry 2.4l, 4cylinder engine and i noticed that when i am driving and i have my heater turned up all the way high and have the fan turned on to the highest speed my temperature gauge goes down almost all the way down to cold it blows warm air still but the temperature gauge is only staying on the first line is that normal?... the gauge does stay more in the middle when i have the fan speed on the middle speed but not when its cranked all the way up?... i have drained and filled the antifreeze and changed the thermostat. Just wondering if you have any advice on what else i should check for or if this is normal?... thanks so much for your help.