AC Tune-Up Checklist
6-Month maintenance inspection — complete each step and flag any concerns
6-Month Tune-Up Inspection
Check off each step as verified. Flag any item that needs attention or follow-up work.
1. Electrical
Thermostat Calibration & Operation
Verify thermostat reads accurately, cycles correctly, and settings are correct
Capacitor Test
Test start and run capacitor MFD — replace if out of tolerance (±6%)
Contactor Inspection
Check contactor contacts for pitting, burning, or excessive wear
Electrical Connections & Wiring
Inspect and tighten all electrical connections, check for fraying or corrosion
Amperage Draw – Compressor & Fan Motors
Measure running amps on compressor and condenser fan motor against nameplate specs
2. Mechanical
Condenser Coil Cleaning
Rinse or wash outdoor condenser coil to remove dirt, debris, and cottonwood buildup
Evaporator Coil Inspection
Visually inspect indoor evaporator coil for dirt, frost, or mold buildup
Condenser Fan Blade & Motor
Inspect fan blade for cracks or damage, check motor bearing for wear or noise
Blower Wheel & Motor
Inspect blower wheel for debris buildup, check belt (if applicable) and motor operation
Condensate Drain Line
Flush condensate drain, check drain pan for algae or standing water
3. Refrigerant
Refrigerant Pressure Check
Check suction and discharge pressures and compare to manufacturer specs
Superheat / Subcooling Check
Verify superheat (TXV or fixed orifice) or subcooling to confirm proper charge
Refrigerant Leak Inspection
Visually inspect line set, coils, and fittings for signs of oil or refrigerant leak
4. Airflow
Air Filter Replacement
Replace or inspect air filter — every 1–3 months, every tuneup at minimum
Static Pressure Check
Measure supply and return static pressure to verify adequate airflow across the system
Supply Vents & Returns
Confirm all supply vents and return grilles are open and free of obstruction
Delta T (Temperature Split)
Measure supply vs. return air temp — expect 16–22°F split across the coil under normal conditions
5. Safety & Final
Disconnect & Breaker Inspection
Inspect outdoor disconnect box and breaker for proper sizing and condition
Carbon Monoxide Check (if gas heat present)
Verify no CO presence near air handler or furnace if combined system
Full System Run & Final Verification
Run system through full cooling cycle, confirm no abnormal noise, vibration, or trips
Note: This checklist covers a standard 6-month AC tune-up. Actual findings may require additional repairs. We will provide a separate quote for any parts or labor needed beyond routine maintenance.
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