Cooling Season (Spring / Early Summer)

Routine maintenance protects your system, improves efficiency, and helps prevent expensive breakdowns during peak heat.

Outdoor Unit (Condenser)

✔ Remove debris, leaves, and grass from around the unit
✔ Maintain 18–24 inches of clearance on all sides
✔ Lightly rinse condenser coil with a garden hose (no pressure washer)
✔ Inspect for visible damage, bent fins, or loose wiring
✔ Ensure unit is level on pad and not sinking
✔ Check that disconnect box is secure and sealed

Why this matters: Restricted airflow is one of the most common causes of high head pressure and premature compressor failure.

Indoor System

✔ Replace or clean air filter
✔ Check thermostat settings and proper operation
✔ Inspect supply and return vents for blockages
✔ Ensure all vents are open and unobstructed
✔ Check condensate drain for clogs or standing water
✔ Inspect drain pan for rust or overflow risk
✔ Test float switch (if installed)

Why this matters: Airflow problems reduce efficiency and can cause coil freezing or water damage.

System Operation Check

✔ Verify system starts and shuts off normally
✔ Listen for unusual noises or vibrations
✔ Confirm strong, steady airflow from vents
✔ Check for uneven cooling between rooms
✔ Make sure outdoor fan and compressor are running
✔ Monitor system for short cycling

Warning Signs to Watch For:

• Warm air blowing from vents

• Ice forming on refrigerant lines

• Water around indoor unit

• Loud grinding, buzzing, or rattling

• System running constantly without reaching temperature

If you notice any of these issues, further diagnosis may be needed.

HVAC Maintenance Checklist

Pro Tips

Maintenance helps extend system life — but it does not fix:

• Refrigerant leaks

• Failing compressors

• Major electrical component issues

• Undersized or improperly installed systems

If you’re unsure whether a repair quote is fair, use our calculators to compare pricing before making a decision.

Recommended Maintenance Schedule

Cooling system: Once per year (spring)
Heating system: Once per year (fall)
Full system inspection: Annually

Homes with pets, allergies, or high usage may require more frequent filter changes.

Important Note

This checklist is for general homeowner guidance. Always follow manufacturer instructions and consult a licensed HVAC professional for service involving electrical or refrigerant components.