Rheem Error Codes

Select an error code below to identify the problem and find the solution.

Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.

Standby

Standby. No command for unit operation.

Low Pressure Control Open

Low Pressure Control Open. The ICC detects the LPC is open. Note: The low pressure control is ignored for the first 90 seconds of compressor operation.

Low Line Voltage or No Line Voltage Fault

Low Line Voltage or No Line Voltage Fault.

High Line Voltage Fault

High Line Voltage Fault.

High Pressure Control Open

High Pressure Control Open. The ICC detects the HPC is open.

Fuse Open

Fuse Open. The ICC detects the on-board fuse is open.

Low Air Flow

Low Air Flow. The ICC detects that the indoor unit is not providing the minimum airflow requirements.

Condenser Coil Temperature Fault

Condenser Coil Temperature Fault. The sensor detects an abnormally low or high coil temperature.

Outdoor Ambient Temperature Fault

Outdoor Ambient Temperature Fault. The sensor detects an abnormally low or high outdoor ambient temperature.

Internal Control Fault

Internal Control Fault. The sensor detects an abnormally low or high outdoor ambient temperature. The control is not functioning properly.

C (Stage 1)

First Stage Cooling

First Stage Cooling. Unit has received a command for first stage cooling.

C (Flashing)

Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active.

C (Stage 2)

Second Stage Cooling

Second Stage Cooling. Unit has received a command for second stage cooling.

H (Stage 1)

First Stage Heat Pump

First Stage Heat Pump. Unit has received a command for first stage heat pump.

H (Flashing)

Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active

Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active.

H (Stage 2)

Second Stage Heat Pump

Second Stage Heat Pump. Unit has received a command for second stage heat pump.

Defrost Active

Defrost Active. The unit is undergoing a defrost cycle.

Test Mode

Test Mode.

Protector Trip

Protector Trip. A command for compressor operation is present but no current is measured to the compressor.

Long Run Time (Compressor)

Long Run Time (Compressor). The compressor has continuously run for more than 18 hours in the cooling mode.

High Pressure

High Pressure. Compressor limit has opened four (4) times within a call for operation.

Short Cycling

Short Cycling. ICC detects the run time for the past four (4) compressor or cycles is less than three (3) minutes each.

Locked Rotor

Locked Rotor. The ICC detects four (4) consecutive protector trips have occurred and the average run time for each trip is less than 15 seconds.

Open circuit (Compressor Will not Run)

Open circuit (Compressor Will not Run). The ICC has had a protector trip for longer than 4 hours.

Compressor Open Start Circuit

Compressor Open Start Circuit. The ICC detects current in the Run circuit but not in the Start circuit of the compressor.

Compressor Open Start Circuit

Compressor Open Start Circuit. The ICC detects current in the Run circuit but not in the Start circuit of the compressor four (4) times in one compressor call.

Compressor Open Run Circuit

Compressor Open Run Circuit. The ICC detects current in the Start circuit but not in the Run circuit of the compressor.

Compressor Open Run Circuit

Compressor Open Run Circuit. The ICC detects current in the Start circuit but not in the Run circuit of the compressor four (4) times in one compressor call.