Green Flow Solution logo
Schedule Service

Manufacturer diagnostic code

Back to all BLUERIDGE BMKH18MC codes

BLUERIDGE BMKH18MC Ld troubleshooting

Compressor phase-loss or phase-reversal protection. Document the displayed code and operating conditions before scheduling service.

Request ServiceEquipment Quote

What this code means

The Blueridge BMKH M3 system service manual identifies Ld as compressor phase-loss or phase-reversal protection.

Code
Ld
System area
System diagnostics
Priority
Urgent
Applicable code set
BLUERIDGE BMKH M3 outdoor-unit malfunction codes

Safe checks

  • Confirm the thermostat is on, set correctly, and calling for heating or cooling.
  • Check the air filter and visible return-air path for obvious airflow restrictions.
  • Record the displayed code or flash sequence before scheduling service.

First step

Record the code, avoid repeated reset attempts, and schedule GreenFlow service.

Frequently asked questions

What does Ld mean on a BLUERIDGE BMKH18MC?

The Blueridge BMKH M3 system service manual identifies Ld as compressor phase-loss or phase-reversal protection.

What should I safely check before scheduling service?

Use only the visible, non-invasive checks listed on this page. Do not open equipment panels.

When should GreenFlow handle this code?

Call GreenFlow if the code repeats, the equipment is locked out, heating or cooling is not restored, or the condition involves gas, ignition, pressure, wiring, a motor, or a control board.

Manufacturer source document