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Joseph TownsendJul 27, 2025
What to do if the OFF timer indicator shows a check code and indoor unit number on my Toshiba MMU-UP0121HP-E?
- AahardyJul 27, 2025
If the OFF timer indicator on your Toshiba Air Conditioner is alternately displaying a check code and the indoor unit number, check the troubleshooting history by pressing the OFF timer button for more than 10 seconds.