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2-time blink

Operation indicator blinks 2 times — Indoor coil thermistor issue

Mitsubishi Electric · Air Conditioning

What does 2-time blink mean?

The operation indicator on the indoor unit blinks twice. This points to a fault with the indoor coil thermistor, which could be shorted or open.

Common Causes

  • Indoor coil thermistor is shorted
  • Indoor coil thermistor is open circuit

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the characteristics of the main and sub indoor coil thermistors.

  2. 2

    Verify that the thermistor connections are secure.

  3. 3

    Contact a professional if the issue continues.

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

Related Faults

0.5-second ON / 0.5-second OFF blinkUpper lamp blinks 0.5-second ON/OFF - Miswiring or serial signal error00Normal operation - No error codes1 beep during error display mode1 beep during error display mode - Unit has an error (different code)
Source: Mitsubishi Electric Air Conditioning
Open Manual (Page 36)Search more codes in this manual