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Midea · Furnace

LED2 green 1 flash Refrigerant leak sensor communication failure

High severity Midea 96% AFUE A2L Gas Furnace (BGH96M)

What the control is telling you

The fan drive board has lost communication with the A2L refrigerant sensor for 2 minutes, or the sensor is faulty. The Y (cooling) signal is cut, so cooling stops.

Applies to: Midea BGH96M 96% AFUE two-stage gas furnaces (060B3A, 080B3A, 080C4A, 100C5A, 100D5A, 120D5A) with A2L refrigerant leak sensor on CN30 (fan drive board LED2)

Likely causes

  • Sensor cable loose or not plugged into CN30
  • Damaged sensor cable
  • Failed refrigerant sensor

Test and repair steps

  1. Check the refrigerant sensor cable is fully seated in CN30 on the fan drive board.
  2. Inspect the sensor cable for damage along its run to the coil.
  3. Confirm SW1-2 on the drive board is ON (sensor installed).
  4. If the connection is good and the fault remains, replace the sensor (contact distributor - sensor is supplied under the coil manufacturer label).

Models that show this code

6 models in Midea 96% AFUE A2L Gas Furnace (BGH96M)

BGH96M060B3ABGH96M080B3ABGH96M080C4ABGH96M100C5ABGH96M100D5ABGH96M120D5A

Other codes on the same units

  • E5 Limit/rollout switch open less than 5 minutes
  • E6 Limit/rollout switch open more than 5 minutes
  • E7 System lockout - failed ignition
  • E8 System lockout - too many flame dropouts
  • LED2 green 2 flashes Refrigerant concentration above alarm limit (leak)
  • LED2 green 3 flashes Sensor connected but SW1-2 OFF (DIP reminder)
  • LED2 green 4 flashes Refrigerant sensor expired or faulty
  • FL Low flame signal

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Source: Midea 96% AFUE Gas Furnace (A2L) Troubleshooting Guide, Appendix A3 Requirements for refrigerant leakage sensors, LED2 table, p.27. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.