DUCTLESS HVAC • PARTS • DIAGNOSTIC SERVICE

Mini-Split Parts & Diagnostic Service

Diagnosis and component service for ductless mini-split systems. We trace error codes and operating symptoms before matching controls, sensors, motors, drainage parts and refrigerant components to the complete equipment model and serial number.

Common mini-split components we diagnose and replace

Availability and compatibility vary by manufacturer. These groups explain the parts commonly evaluated during an on-site service visit.

PCB

Control boards & inverter modules

Indoor and outdoor boards are tested for power input, communication, output commands, damaged components and fault history before replacement.

TEMP

Thermistors & system sensors

Coil, room, discharge and ambient sensors are checked against manufacturer resistance and temperature data so a sensor fault is not confused with another problem.

FAN

Indoor fan motors & blower wheels

We diagnose noisy bearings, weak airflow, seized motors, dirty cross-flow wheels and speed-control faults, then replace or clean the affected assembly.

DRAIN

Condensate pumps, pans & drain lines

Leaks and shutdowns can come from restricted drains, cracked pans, failed float switches or pumps. We locate the cause and restore dependable drainage.

OUT

Outdoor fan motors & propellers

Motor amperage, bearings, wiring, drive electronics, blade condition and airflow are evaluated when the outdoor unit overheats, vibrates or stops.

REF

Valves, coils & refrigerant components

Electronic expansion valves, service valves, heat exchangers and flare connections are checked when temperatures, pressures or refrigerant flow are abnormal.

COMP

Compressors & power components

Compressor windings, insulation, current draw, capacitors, reactors and inverter output are tested together before a major component decision is made.

Indoor unit covers, filters & louvers

Filters, air guides, vanes, louvers and cabinet pieces are matched carefully because dimensions and mounting details differ between model families.

Correct identification matters. Parts are matched from the complete equipment model and serial number, electrical ratings, dimensions, wiring and the actual diagnosis—not from appearance alone.

How the service process works

• Record the complete model, serial number, error code and operating history for every connected indoor and outdoor unit.
• Test electrical supply, communication wiring, controls, sensors, airflow, drainage and the refrigerant circuit before ordering a component.
• Match voltage, capacity, connectors, board revision, configuration settings and manufacturer supersessions.
• Install the approved part, reassemble the system and verify temperatures, airflow, drainage, amperage and normal communication.