Heat Pump Maintenance Checklist

Clean or replace your air filters every month during heavy-use seasons. A clogged filter reduces airflow and forces the system to work harder, raising your electric bill. Most filters slide out easily from the indoor air handler. Washable filters can be rinsed with warm water and mild soap. Let them dry completely before reinstalling. Check the outdoor unit for leaves, grass clippings, snow, and ice. Clear at least two feet of space around it. In winter, make sure snow does not pile up against the unit. A small roof or cover can help, but never fully enclose the unit. Listen for unusual noises like grinding, rattling, or hissing. These can signal a problem before it becomes a breakdown.

Twice a year, typically in spring and fall, deep clean the outdoor coil. Turn off power at the breaker first. Use a garden hose with a gentle spray to wash dirt off the fins. Never use a pressure washer. It will bend the delicate aluminum fins and reduce efficiency. Clean the condensate drain line by pouring a cup of white vinegar through it. This prevents algae and mold from clogging the line, which can cause water damage inside your home. Check the insulation on the refrigerant lines running between the indoor and outdoor units. Replace any damaged or missing insulation. It is inexpensive foam tubing available at any hardware store. Test the system in both heating and cooling modes to make sure it switches properly. If you notice weak airflow or it takes a long time to reach temperature, call a professional before the season gets extreme.

Schedule a professional tune-up once a year. An HVAC technician will check refrigerant levels, test the compressor, clean the coils thoroughly, inspect electrical connections, and verify the thermostat is calibrated correctly. This costs between $100 and $200 and is worth it for the peace of mind, especially before winter. Call a pro immediately if you hear grinding or screeching sounds, if the system frequently trips the circuit breaker, if ice builds up on the outdoor unit in mild weather, or if your electric bill spikes for no apparent reason. These are signs of a serious issue that DIY maintenance will not fix.