Thermostats: COOL, 77°, Fan: Auto
Thermostat: As Normal
Setting the fan switch to AUTO runs the indoor fan only when there is a call for cooling or heating, in this position the fan will turn off after the temperature is satisfied.In this setting your house will stay the driest during the cooling mode.
No but will be fix their $49.95 tune-ups.
When auxiliary heat is displays on a thermostat, the thermostat is notifying the user electric heat or second stage of heating for a heat pump system is on. If the temperature is set 3 degrees warmer than the house temperature then it is usually normal to see this display. Additionally on most digital heat pump thermostats the auxiliary heat will be timed to come on if the call for heat is extended.
While it is normal to see the Aux. heat during a high heat demand, prolonged running the system,lukewarm air, and auxiliary heat display constantly on may indicate there is a problem with the outside heat pump.
There is no simple answer to this.
The best air filter will catches the most particles in the air while letting the proper air thru them so the ac equipment can do its job properly. Paying more for an air filter at the hardware store may not be in the best interest for the performance and life of an air conditioner.