LG PREHEAT status display

What it means

Preheat is a normal heating startup status. LG says the indoor fan can pause while the indoor piping warms so the unit does not blow cold air into the room.

Urgency

Likely causes

Homeowner fix

Wait several minutes for warm air to begin. If the room is already near the set temperature, raise the heating setpoint if you need more heat.

When to call a pro

Call for service if Preheat never clears, the unit never produces warm air, or another CH code appears.

Repair vs replace

This is a normal operating display, not a repair-or-replace decision.

• LG Mega R-32 9,000 BTU (115V)

  Mega R-32

• LG Mega R-32 9,000 BTU (230V)

  Mega R-32

• LG Mega R-32 12,000 BTU (115V)

  Mega R-32

• LG Mega R-32 12,000 BTU (230V)

  Mega R-32

For your technician

N/A unless preheat is excessive; then verify heating operation, indoor coil temperature sensing, airflow, and refrigerant condition. Page context: LG maps this display to the Mega R-32 line; source: LG official support pages: [LG Air Conditioner] Guide to Error Codes; [LG Air Conditioner] How to Check Air Conditioner Error Codes; LG status-display help articles; LG Korea [LG Air Conditioner] Air conditioner error inquiry cross-check; display convention: match the letter P, letter R, letter E, letter H, letter E, letter A, and letter T marker exactly before comparing neighboring codes.

Which systems show it

Mega R-32

Related troubleshooting

Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.

Related codes

Source

Next step