I have a Carrier installed home cooling system, the contractor installed a thermostat to go with the system (model: TSTATCCPDF01-B). Cooling works fine except that the blower fan never seems to turn off after the set temperature is reached. What I've noticed is that if I set the temperature to say 78 F and the room temperature is currently 82, cooling kicks in and the A/C stops after reaching 78F. The blower fan keeps running and eventually the A/C kicks in again when temperature goes over 78. The only time the fan turns off is if I take the temperature setting to 80 or higher (when the room has cooled to 78). The blower fan seems to be running 24 hours every day and this does not seem normal. I looked at the operating instructions for the thermostat (not the user's manual) and I did not see any option to specifically control the blower fan.
Is this normal operation ?, if not is this something I can try and fix or should I call the contractor?