| Rheem Error Code | What this means | How to fix it |
|---|---|---|
| Error Code 0 | Unit is on standby and operating normally. | Normal operation. |
| Error Code C | Unit is operating normally and in a cooling stage. | Normal operation. |
| Error Code Flashing C | Cooling was commanded during an active anti-short cycle. | Wait until unit timer has expired or press the TEST button to defeat short cycle delay. |
| Error Code D1 | No shared data. | Replace memory card with correct system information. |
| Error Code D3 | Airflow mismatch. | Replace with properly sized air handler. |
| Error Code D4 | Memory card in control board is invalid. | Check if memory card is present and ensure it matches device. |
| Error Code D8 | Old shared data system data is obsolete. | If system will not operate, order new memory card to update system information. |
| Error Code T | Unit is in test mode. | |
| Error Code P | There's no current going to the compressor. | Check to see if the motor protector is open or line voltage is disconnected. |
| Error Code 1 | The compressor is running continuously. | Check to see if there is low refrigerant, air duct leakage, a dirty outdoor coil, or a dirty air filter. |
| Error Codes 02, 29, and flashing L29 | High-pressure problem. | Check if there is a dirty outdoor coil, outdoor fan is not running, liquid line restriction, or excessive refrigerant charge. |
| Error Code 03 | Unit is short-cycling. | Check thermostat wire connections (R. C. 1. & 2) and thermostat location in zone (too close to discharge grill). |
| Error Codes 05, 06, 07, L6, and L7 | Problem with the compressor because of an open circuit. | Check for damaged, miswired. or wrong run capacitor, broken wires, loose connectors, or miswired compressor, compressor windings for continuity, and open compressor internal protector. |
| Error Codes L4 | The rotor is locked. | Check if there is a bad run capacitor, low line voltage, excessive refrigerant in compressor, or seized bearings in compressor. |
| Error Code 09 | Secondary voltage is low. | Check if the control transformer is overloaded or for low line voltage. |
| Error Codes 21 and flashing L21 | Low-pressure control is open. | Check if unit has low refrigerant charge, indoor coil is frozen, dirty indoor coil or filter, indoor blower is not running, or expansion valve is not operating correctly. |
| Error Code 27 | Low or no line voltage. | Check incoming line voltage to the disconnect and unit and wiring connections. |
| Error Code 28 | High line voltage fault. | Check line voltage. |
| Error Code 30 | On-board fuse is open. | Check if low voltage wiring at R and C is damaged or miswired. |
| Error Code 80 | Unit isn't meeting minimum airflow requirements. | Replace with properly sized unit. |
| Error Code 83 | Problem with the condenser coil temperature. | Check sensor is installed correctly on control and replace the sensor. |
| Error Code 84 | Problem with the outdoor ambient temperature fault. | Check unit placement. If the outdoor unit is in a high temperature area, wait until the ambient temperature drops and check sensor reading. Check sensor is installed correctly on control. Replace the sensor. |
| Error Code 93 | There's a problem with the internal control. | Check control for proper system operation. Replace control. |
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11, 45, 46 and 57. Connecting the furnace to an approved ClimateTalk communicat- ing thermostat and approved Rheem or Ruud communicating condenser. The only approved configuration is to install.
Rheem Gas Furnace Code 57 09
Rheem Gas Furnace Error Code 57
For a Ruud Ultra UGFD series gas furnace with seven segment LED diagnostics, error code 57 refers to a problem at the High Pressure Switch HPS. It means the Draft Inducer DI is working, the HPS contacts are open and as a result the Igniter. Ultra Low NOx 80% AFUE Upflow/Horizontal Gas Furnace (W801T) Environmentally friendly and responsible product reducing NOx emissions by 65%. Single Stage, Same 34' Cabinet Height, Simple Technology; Diagnostics: 7-Segment LED for faster and more accurate diagnostics; Ignition System: DSI for unmatched durability & years of worry-free operation.