Ductless Mini-Split Maintenance Checklist

Indoor head cleaning, blower wheel, drain, flare joints, outdoor coil and operating readings for each zone.

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Job

CompanyTechnicianDateCustomerAddress

Equipment

Indoor model / serialOutdoor model / serialRefrigerant / gas type

Indoor head (repeat per zone)

Filters washed and dried
Coil cleaned (coil cleaner, rinsed, protected board)
Blower wheel cleaned; no mold buildup
Drain pan and line flushed; no leaks at the head
Louvers and remote/thermostat work
Return air temperature	°F
Supply air temperature	°F
No error codes storedRecord any codes in notes

Outdoor unit

Coil clean; fins straight
Flare joints checked for oil/leaks (leak detector)
Service valve caps on and tight
Interconnect wiring tight at both ends
Supply voltage	V
Outdoor unit amps	A
Unit level, clear of debris and snow

Refrigerant (if gauges are connected)

Outdoor air temperature	°F
Low-side pressure	psig
Suction line temperature	°F
SuperheatInverter systems vary with speed: use the manufacturer's charging method	°F

Notes and recommendations

Technician signatureCustomer signature

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General good practice for field reference. The equipment manufacturer's instructions and local code always come first. Suggest an improvement: hello@hvaccheatsheet.com.

HVAC Cheat Sheet · Free PT charts, code lookups and calculators for techs at hvaccheatsheet.com