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Left lamp blinks 6-time 2.5-second OFF

Left lamp blinks 6-time 2.5-second OFF — Outdoor thermistors short or open circuit

Mitsubishi Electric · Air Conditioning

What does Left lamp blinks 6-time 2.5-second OFF mean?

The left lamp of the OPERATION INDICATOR blinks six times, followed by a 2.5-second pause. This indicates a short or open circuit in the outdoor thermistors during compressor operation.

Common Causes

  • Short circuit in the outdoor thermistors.
  • Open circuit in the outdoor thermistors.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn OFF the power supply to the unit.

  2. 2

    Refer to 'Check of outdoor thermistor' (in the outdoor unit service manual) for specific troubleshooting steps.

  3. 3

    Contact a qualified technician to inspect and potentially replace the outdoor thermistors.

Browse all codes in this manual (170)
Verified technical data. Last updated: April 2026

Related Faults

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Source: Mitsubishi Electric Air Conditioning
Open Manual (Page 24)Search more codes in this manual