Unlike a furnace that sits idle from May to October, your heat pump runs 12 months a year - cooling in summer, heating in winter, dehumidifying in shoulder seasons. That year-round operation means maintenance cannot be seasonal afterthought. A properly maintained heat pump lasts 15 to 20 years and runs 25 to 40% more efficiently than a neglected one.
Monthly Tasks (Year-Round)
- Check air filter - replace 1-inch filters monthly, 4-inch media filters every 3 to 6 months
- Inspect thermostat settings and verify correct operation
- Check outdoor unit for debris accumulation around the base
- Listen for new noises: rattling, grinding, or squealing that was not there before
Spring Maintenance Checklist (March - April)
Spring is the ideal time to service a heat pump before the summer cooling season. The system has just come off heating mode and is ready for inspection.
- Clean outdoor unit coil with garden hose (inside-out direction)
- Clear at least 18 inches of clearance on all sides of outdoor unit
- Inspect refrigerant line insulation - replace if cracked or deteriorated
- Test cooling mode - confirm cold air within 10 minutes of startup
- Check condensate drain line - pour water to confirm it flows freely
- Inspect ductwork connections in accessible areas for loose seals
- Test emergency heat / auxiliary heat strips to confirm function
Summer Maintenance Checklist (June - August)
- Monitor condensate drain line monthly - clear any algae buildup with a bleach tablet
- Keep plants and vegetation trimmed back at least 2 feet from outdoor unit
- Watch for unusual spikes in energy bills indicating reduced efficiency
- Check that supply and return vents are unobstructed
- Listen for a gurgling sound which may indicate low refrigerant
Fall Maintenance Checklist (September - October)
Fall maintenance prepares the heat pump for the transition to heating mode - the hardest working period in a Toronto winter.
- Test heating mode before temperatures drop below 5°C
- Clean leaves and fall debris from outdoor unit thoroughly
- Inspect defrost cycle operation - confirm unit defrosts and returns to heating mode
- Check weatherstripping and insulation on refrigerant lines outside
- Book professional annual tune-up (refrigerant check, electrical inspection)
- Test carbon monoxide and smoke detectors
- Program thermostat for heating season schedule
Winter Maintenance Checklist (November - March)
- After snowfall: clear snow from around unit (keep 18" clearance on sides)
- Check for ice buildup - light frost is normal, heavy ice is not
- Do not use sharp tools on ice - wait for defrost cycle
- Keep dryer vents, exhaust fans, and vents clear of snow drifts
- Monitor supply air temperature: should be 18 to 25°C above indoor temp in heating mode
- Check that auxiliary/emergency heat kicks in properly on coldest days (-15°C and below)
What a Professional Heat Pump Tune-Up Includes
- Refrigerant charge measurement and top-up if required
- Electrical connections inspection and tightening
- Capacitor and contactor testing
- Coil cleaning (evaporator and condenser)
- Defrost board and sensor testing
- Thermostat calibration and staging verification
- Full heating and cooling mode performance test
- Safety controls inspection
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Book a Heat Pump Tune-Up?Frequently Asked Questions
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