Midea Thermostat / Sensor Control Failure

Unit runs continuously and room becomes too cold or too hot; does not stop at set temperature

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Faulty indoor ambient sensor (T1), Sensor not sensing room air correctly, Stuck relay on indoor PCB, Incorrect mode or fan settings

How to Fix / Troubleshooting

Safety first: Turn off power before handling sensors or PCB.

Steps to check:

  • 1. Verify settings: Ensure the unit is not set to extreme temperatures or in continuous DRY mode.
  • 2. Check sensor placement: Confirm the T1 sensor is in the return air path and not buried in insulation or touching the coil.
  • 3. Power reset: Turn off the breaker for 10 minutes, then restart and observe if control improves.

When to call a technician: If the unit still ignores set temperature, a technician should test the sensor and PCB relays and replace the faulty component.

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Repair Difficulty

Medium 3/5

Required Part

Indoor Ambient Temperature Sensor (T1)
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