HI LO Moderate Easy DIY

Frigidaire Refrigerator HI LO — Line Voltage Out of Range

Frigidaire Refrigerator · Error code HI LO

What HI LO Means

Incoming AC voltage to the refrigerator is outside the acceptable operating window — too high or too low.

Symptoms

  • HI LO on display
  • Compressor not running
  • Lights flickering
  • Repeated resets

Common Causes

1
Brownout or surge on utility power

Voltage dipped below ~90V or spiked above ~135V.

2
Refrigerator on a shared overloaded circuit

Heavy appliance on same circuit drops voltage.

3
Plugged into a UPS or unsuitable inverter

Square-wave inverter trips the sensor.

4
Loose outlet wiring

Worn outlet causes voltage drop.

How to Fix It

  1. Unplug refrigerator and plug it into a known-good 120V outlet on a dedicated circuit.
  2. Check the outlet with a multimeter for steady 110-125V AC.
  3. Remove from any UPS, surge strip with active conditioning, or generator with poor wave form.
  4. If on a generator, ensure pure-sine output and adequate capacity.
  5. If code returns on good power, suspect the main control board.

More Frigidaire Refrigerator Codes

1F 1F — Ice Maker Fault 1 SH 1 SH — Fresh Food Sensor Shorted 1 SY 1 SY — Fresh Food Sensor Open 2 SH 2 SH — Freezer Sensor Shorted 3 SH 3 SH — Evaporator Sensor Shorted 3 SY 3 SY — Evaporator Sensor Open

All Frigidaire codes → All refrigerator codes →

Verified against manufacturer documentation: frigidaire.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.