Panasonic Compressor Non-Start

Outdoor unit fan runs but compressor does not start; no cooling or heating.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Failed inverter compressor, Faulty outdoor inverter PCB, Loose compressor connector, Internal compressor thermal protector open

How to Fix / Troubleshooting

Warning: Compressor and inverter diagnostics involve high voltage. Limit yourself to observation and basic checks.

Steps:

  • 1. Listen for compressor: With the unit calling for cooling, stand near the outdoor unit. You should hear a distinct compressor hum in addition to the fan. Silence suggests non-start.
  • 2. Check for error codes: Look at the indoor display or LED blink patterns and reference the Panasonic manual.
  • 3. Inspect connectors: With power OFF, ensure the compressor's multi-pin connector is firmly seated.

If the compressor still does not start, a technician must test the compressor and inverter PCB and replace the faulty component.

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Repair Difficulty

Professional Required 5/5

Required Part

Inverter Compressor
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