Free Guide
HVAC Maintenance Checklist
Complete HVAC maintenance checklist for seasonal tune-ups, inspections, and preventive maintenance. Print-ready checklist for technicians in the field.
Pre-Inspection Safety Checks
Before beginning any HVAC maintenance, ensure safety protocols are in place.
- Turn off power at the disconnect switch and breaker panel
- Verify power is off with a non-contact voltage tester
- Check for gas leaks near the furnace with a combustible gas detector
- Ensure adequate workspace lighting and ventilation
- Review the equipment service history and prior work orders
- Note the equipment make, model, serial number, and installation date
Thermostat & Controls
Verify the thermostat and control systems are functioning correctly.
- Test heating and cooling modes cycle properly
- Verify temperature accuracy (compare with calibrated thermometer)
- Check programmed schedules are correct for the season
- Inspect wiring connections at the thermostat base
- Test emergency heat mode (heat pumps only)
- Check batteries and replace if low (battery-powered models)
Air Filter & Airflow
Restricted airflow is the #1 cause of HVAC inefficiency and premature failure.
- Inspect air filter condition and record size for replacement
- Replace filter if dirty (recommend every 30-90 days to customer)
- Check all supply and return vents are open and unobstructed
- Measure static pressure across the air handler
- Inspect ductwork for visible leaks, disconnections, or damage
- Verify duct insulation is intact in unconditioned spaces
Outdoor Condenser Unit
The outdoor unit needs regular inspection to maintain peak efficiency.
- Clear debris, leaves, and vegetation (maintain 2 ft clearance)
- Clean condenser coils with coil cleaner and low-pressure water
- Inspect fan blade for cracks or imbalance
- Check the condenser fan motor amp draw
- Inspect refrigerant line insulation on the suction line
- Verify the concrete pad is level and stable
- Check electrical connections and tighten as needed
Indoor Evaporator & Air Handler
The indoor components require careful inspection for efficiency and safety.
- Inspect evaporator coil for dirt or frost buildup
- Check the condensate drain pan and drain line for blockages
- Flush condensate drain with vinegar or approved cleaner
- Inspect the blower wheel for dirt accumulation
- Check blower motor amp draw against nameplate rating
- Lubricate motor bearings if applicable (not sealed bearings)
- Inspect electrical connections and contactors
Refrigerant System
Refrigerant checks require EPA certification and careful measurement.
- Check subcooling and superheat readings against manufacturer specs
- Inspect refrigerant lines for oil stains indicating leaks
- Record suction and liquid line temperatures and pressures
- Note refrigerant type (R-410A, R-22, etc.) on service ticket
- Check service valve caps are tight and not leaking
Final Performance Verification
Verify the system is operating within manufacturer specifications before leaving.
- Measure supply and return air temperature differential (should be 15-22F for cooling)
- Verify amp draws on all motors are within nameplate specs
- Run the system through a full heating and cooling cycle
- Document all readings and findings on the service ticket
- Discuss findings and recommendations with the customer
- Schedule the next maintenance visit (6 months for seasonal tune-up)
Pro Tips
- 1.
Take photos of nameplate data on the first visit -- saves time on every return trip.
- 2.
Always carry a spare capacitor kit -- it is the most common part failure and an easy upsell.
- 3.
Use GetTimePad to create recurring maintenance appointments so customers never miss a seasonal tune-up.
- 4.
Track temperature split readings over time in your service notes -- declining splits signal developing issues.
- 5.
Offer a maintenance agreement at a discount when you find a potential issue during the inspection.
Related Resources
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Professional HVAC invoice template with fields for equipment, labor, refrigerant, and warranty info. Download and customize for your heating and cooling business.
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Free Electrical Invoice Template
Electrical contractor invoice template with fields for wiring, fixtures, panel upgrades, and inspection fees. Professional layout for licensed electricians.
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Locksmith invoice template covering lock changes, rekeying, key cutting, and emergency lockout services. Includes after-hours rate fields.
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