For a typical Arizona business, heating and cooling account for up to 50% of electricity costs. Poorly maintained equipment consumes more energy than it should and is likely to fail sooner. In some cases, lack of proper maintenance may void manufacturer warranties.
Consider hiring a contractor to perform a seasonal tune-up. There are varying levels, but the most beneficial tune-ups will include the following and can improve performance up to 10%:
Refrigerant charge & air flow verification
Tightening of any loose electrical connections
Removal of dirt build up on coils and drain lines
Economizer function test
Additionally, you should change filters monthly. Dirty filters require the system to work harder to maintain the appropriate level of air flow.