HVACopediaMidea · Furnace
LED2 green 3 flashes Sensor connected but SW1-2 OFF (DIP reminder)
What the control is telling you
The refrigerant sensor is connected and communicating, but drive-board DIP switch SW1-2 is still set to OFF (no sensor).
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
- SW1-2 left in OFF position after sensor install
Test and repair steps
- Power off the furnace.
- Set drive-board DIP SW1-2 to ON (with refrigerant sensor).
- Restore power and confirm the LED2 reminder stops.
Models that show this code
6 models in Midea 96% AFUE A2L Gas Furnace (BGH96M)
Other codes on the same units
- E6 Limit/rollout switch open more than 5 minutes
- E7 System lockout - failed ignition
- E8 System lockout - too many flame dropouts
- LED2 green 1 flash Refrigerant leak sensor communication failure
- LED2 green 2 flashes Refrigerant concentration above alarm limit (leak)
- LED2 green 4 flashes Refrigerant sensor expired or faulty
- FL Low flame signal
- Pr Incorrect polarity of L1/L2
Save it for the next call
Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.
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.