A well-maintained air conditioner will run more efficiently, saving you money on utility bills.
Step 6: Add a replacement filter if necessary. If the old filter is dirty, replace it with a new filter. Slide the replacement filter into the unit and replace the cover. Compare the new filter to an old one.
Make sure that electrical power is disconnected from the air conditioner unit before servicing. Window units should be unplugged; central air units should be turned off at the fuse box. For specifics about servicing your specific air conditioner, always refer to the service manual for instructions and safety warnings.
