How to Reset a Mitsubishi Mini-Split (Every Method)

Resetting a Mitsubishi mini-split clears error codes and temporary faults, often resolving issues without a service call. Mitsubishi offers three reset methods depending on the situation: a breaker reset (universal), a remote control reset, and the reset button on the indoor unit. This guide covers all three methods with exact steps.

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Method 1: Circuit Breaker Reset (Recommended First Step)

This is the most effective reset method and works for all Mitsubishi models.

Step 1: Turn off the unit using the remote (press the ON/OFF button).
Step 2: Go to your electrical panel and switch off the dedicated breaker for the mini-split.
Step 3: Wait 30 seconds. For persistent error codes, wait 5 minutes to fully discharge the control board.
Step 4: Switch the breaker back on.
Step 5: Wait 3 full minutes before turning the unit on. Mitsubishi compressors have a built-in 3-minute protection timer after power is restored — do not press buttons during this window or the timer resets.
Step 6: Turn on with the remote and verify normal operation.

Method 2: Remote Control Reset

For a settings reset (timer, mode, temperature) without clearing error codes:

• Press and hold the RESET button on the wireless remote for 3 seconds (small recessed button, requires a pen tip)
• The remote display will briefly go blank and restart
• Re-enter your preferred settings

Note: This resets the remote's memory, not the indoor unit's error log. Use the breaker method to clear error codes from the unit itself.

Method 3: Reset Button on the Indoor Unit

The indoor unit has a small reset button located behind the front panel, typically on the right side near the LED indicators.

Step 1: Open the front panel by lifting it upward.
Step 2: Locate the small RESET button (recessed pinhole).
Step 3: Press and hold for 3–5 seconds using a paperclip or pen tip.
Step 4: Close the panel. Wait 3 minutes before operating.

What Each Reset Clears

Frequently Asked Questions

Why won't my Mitsubishi start after a reset?

The 3-minute compressor protection timer is the most common reason. After any power interruption or reset, Mitsubishi systems delay compressor startup by 3 minutes. Wait the full 3 minutes before turning the unit on. If it still does not start, check for an error code on the LED panel.

Will resetting my Mitsubishi void the warranty?

No. Performing a standard breaker reset is a normal user operation and does not affect warranty coverage.

Related reading:
→ How to Reset a Mini-Split: Step-by-Step for Every Brand
→ Mitsubishi Mini-Split Error Codes Guide
→ Mini-Split Not Working? How to Diagnose Common Issues