We remove the filters, clean the coil, flush the drains, check plumbing  joints, and then check the power connectors to make sure they aren’t damaged by corrosion or if there is any hot spots.

We also check all the wiring, including ensuring that vermin hasn’t chewed anything or caused damage.

Finally, we check the temperature of the air coming out of the vents, clean the coil outdoor unit, check the gas and scope for any oil leaks.