ok it is either the controller that is bad or the circuit board in the indoor unit. the easiest way to tell would be to swap it with another one since you have multiple units. use a screwdriver to pry on the tap on the bottom and pull it off the wall, disconnect the small 2 wire plug on the back and swap it with another units controller. if it still does the same thing on another unit then the

2 Permanently Off until user changes System mode 160 Full Lockout 0 No 1 Yes 162 Lockout On/Off 0 No 1 Yes 164 Lockout System Mode (Heat, Cool, Auto, Drying) 0 No 1 Yes 165 Lockout Fan Mode 0 No 1 Yes 166 Lockout Setpoint 0 No 1 Yes 168 Lockout Set Clock/Day/ Schedule 0 No 1 Yes 170 Max Heat Setpoint 90 90 °F (32 °C) * Subject to

As per the study carried out by ‘The Bureau of Energy Efficiency (BEE)’, it recommends that an air-conditioner’s default setting at 24-degree temperature will help save a lot of Energy. The rationale behind is that normal human body temperature is approximately 36 to 37 degree Celsius and maintaining a temperature around 18-21 degrees
The kumo cloud app works with the Mitsubishi Electric Wireless Interface to enable remote control of Mitsubishi Electric Cooling & Heating equipment from a smart device. The app can be used as the only controller or with compatible controllers. When a Wireless Interface 2 (WI 2) is used to connect the equipment
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Residential & Select Commercial Air Conditioners & Heat Pumps Pages 06-07 Wireless Remote Page 07 MS/MSH WALL-MOUNT SERIES: 9,000-17,000 Btu/h Air Conditioners & Heat Pumps Pages 08-09 MSH-E WALL-MOUNT SERIES: 9,000-15,000 Btu/h Heat Pumps with Auxiliary Electric Heat Pages 08-09 MULTI WALL-MOUNT SERIES: 18,000 Btu/h Air Conditioners Pages 10-11
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mitsubishi electric air conditioner heat mode not working