Error Code: EH 61 – Indoor Pipe Temperature Sensor (T2) Error

Error Code: EH 61 – Indoor Pipe Temperature Sensor (T2) Error
Applies to LETO and AURA Series

What this means:
The indoor pipe temperature sensor (T2) is either disconnected, shorted, or giving incorrect readings. This sensor monitors the refrigerant line temperature inside the unit, helping to regulate system performance.

Try this first (easy fix):

1. Turn off power to your mini split completely.

2. Wait 2 full minutes.

3. Turn the power back on and check the display.

• If the error is gone — your system is good to go.

• If the error remains — continue below.

Next steps (for technicians):

• Check the wiring connection between the T2 sensor and the indoor PCB.

• Ensure connections are clean, secure, and not damaged.

• Measure the resistance of the sensor:

  • If it’s out of range, replace the sensor.

  • If the sensor tests fine, the indoor PCB may be faulty.

What you might need:

• T2 pipe temperature sensor

• Indoor PCB

• Connection wires

Helpful tip:
This error shows up when the sensor voltage is outside the range of 0.06V to 4.94V. The T2 sensor plays an important role in managing refrigerant temperatures — especially during cooling or defrost cycles.

Click here to view the detailed guide.TS05-IDU