Keep Your Ductless Mini-Split Running Strong All Year

We inspect every indoor head for dirt, damage, visible leaks, or electrical issues. We check each head's filter—many are clogged with dust within a season—and its drain pan and line for algae buildup or blockage. We test electrical power and thermostat signal to every head so we know they're receiving control commands correctly. A head with no power, a bad thermostat connection, or a filled drain pan becomes a weak zone even if the refrigerant and compressor are fine.

• Remove and inspect every head's filter
• Check drain pan and drain line for clogging or algae
• Verify electrical power to each head
• Test thermostat signal reception in each zone
• Look for any visible leaks or damage to components
• Confirm mounting brackets are secure and vibration-free

The outdoor unit houses the compressor and main refrigerant circuit. We clear debris blocking the condenser coil, inspect the unit for corrosion or leaks, and verify the compressor is running smoothly without noise or vibration. A clogged outdoor coil forces the compressor to work harder and reduces system efficiency. Oil residue around connections might signal a slow refrigerant leak. We document the outdoor unit's visual condition so you know what's aging.

• Remove leaves, dirt, and debris blocking the condenser coil
• Inspect refrigerant connections for oil residue or leaks
• Check compressor sound and vibration level
• Verify the outdoor fan operates smoothly
• Test the power supply and capacitor function
• Look for corrosion or physical damage to the unit frame

Using digital manifold gauges, we measure refrigerant pressure at the outdoor unit and at each head's connection point. We compare these readings to Daikin and Bosch specifications for your specific system. Mini-split refrigerant is distributed across multiple line sets, and pressure balance across all zones is critical. An imbalance of just a few ounces starves one head while overcharging another. We document all pressures and adjust charge if needed to ensure balanced cooling or heating across all zones.

• Measure high-side and low-side pressure at the outdoor compressor
• Test pressure at each head's connection point
• Compare zone pressures to verify even refrigerant distribution
• Use electronic leak detection to find slow leaks
• Adjust charge if needed to bring all zones into spec
• Record all measurements for comparison next season

Dust accumulates on indoor and outdoor coils, blocking heat transfer and reducing efficiency. We clean coils using approved cleaners to restore their ability to exchange heat. We clear drain lines using air pressure or a drain line cleaner, removing algae and debris so condensate flows freely. We verify airflow from each head—weak airflow signals a dirty filter, coil blockage, or blower motor problems. Each zone must deliver adequate air for proper comfort.

• Clean the indoor coil in every head using approved cleaners
• Clean the outdoor condenser coil of accumulated dirt
• Clear drain lines at every head and the outdoor unit
• Measure airflow temperature from each head
• Verify blower motor operation in each zone
• Test system operation in cooling and heating modes

Modern mini-splits use zone controllers and inverter technology to manage individual heads. We test every head's control board to ensure it responds to thermostat commands, cycles properly, and shows no error codes. We explain any issues we found, provide a written report with photos of cleaned coils, refrigerant data from every zone, and recommendations for the coming season. You'll know which zones are healthy, which are aging, and when to schedule next maintenance.

• Test each head's control board response
• Clear any error codes or warning signals
• Verify thermostat programming and zone settings
• Confirm the inverter compressor modulates correctly
• Provide a detailed written maintenance report
• Schedule your next appointment and review plan benefits