Plz help, my 2.0ts gtv isnt blowing hot hot air into the cabin? i just changed the thermostate and the speed fan resistor on it, cus i thought it was that! and i got the resistor cus i had that problem of the blowers coming on and off, the thermostate needed 2 b changed to because now i got the proper temps, 70-90 and not 55-60 that i always had. Could it just b a air lock?? or is it something major wrong with the heaters? your help would b appreciated..