E26
Baxi Mode Conflict / Protection (e.g., simultaneous heat and cool demand on multi-split)

Indoor unit shows E26; unit may not start in certain modes

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Possible Causes

Incorrect mode selection on different indoor units, Control logic conflict on central controller, Faulty indoor PCB mode relay, Incorrect wiring of mode control lines

How to Fix / Troubleshooting

Steps:

  • 1. Unify modes: On multi-split Baxi systems, ensure all indoor units are set to the same mode (all cooling or all heating) if the outdoor unit does not support mixed modes.
  • 2. Power cycle: Turn off all indoor units, then power off the outdoor unit for 5 minutes. Restore power and start one indoor unit at a time.
  • 3. Check central controller: If using a wired central controller, verify its settings and reset if necessary.

Note: Persistent E26 may indicate a PCB logic fault requiring professional diagnosis.

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Repair Difficulty

Easy 2/5

Required Part

Indoor Main PCB
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