When running my central air unit can I leave the setting at off and move the clip from auto to fan?

When the Fan is set to "auto" and cooling is set. Then that means that when it calls for cooling that it automatically brings on the fan.

If you want the fan to run all the time, then yes move it from Auto to Fan. This will circulate the air in your home. The outside unit weather on cooling or heating mode will still cycle as normal per you desired temperature. The fan will just be on all the time. Thats how I have mine. Fan is on 24/7 and I change my furnace filter every 30 days. Always use a pleated air filter and it does not have to be the most expensive and el cheap will get the job done

Yes you can run the fan with neither heat nor cool turned on.

However, in the heating months when the heat is on or might cycle on, it is recommended that you keep the fan in the auto position.

the ease of protecting the fan indoors the on place is that the air will proceed to bypass during the time of the homestead inspite of if the thermostat has chuffed (reached its set-ingredient). because of the fact maximum residential installations have the return air grille in an substantial area (usually the hallway) and the thermostat close to the return, different than the fan is indoors the on place the thermostat won't adventure the warmth temperature it extremely is gathering indoors the outlying rooms. by using skill of working the fan consistently, you're giving the thermostat a feeling of the customary temperature indoors the homestead because of the fact each and every of the air mixes because of the fact it is going decrease back to the return. as a consequence the cooling can tend to cycle on better in many circumstances because of the reality it better sensible senses the warmth temperature. to date as what's better sensible, it relies upon on your priorities. in case you want to maintain the homestead at a quite consistent temperature during the time of the homestead and during the time of the day, then the on place will furnish the final consequence. The commerce off is which you will enhance your means intake the two from the consistent fan operation as nicely because of the reality the better favourite biking of the compressor. there will be minimum blower motor harm from consistent operation as start up up-up is greater confusing on a motor than non-give up use, in spite of the reality which you will possibly desire to pay better pastime to the filters as they are going to plug up faster.