If you are an owner of Ruud furnace or operate it at your work, you may encounter with Ruud furnace error codes appearing in the operation process. The tables on the page describe the codes, flashes, blinks and other problem signals and let you understand what is going on with the equipment at a certain moment.
The codes are described taking into account the code itself, its status, technical details and possible solutions of the problem. Mostly the detailed description gives you the idea of how to fix the issue. For example, Ruud furnace error code 57 means press switch stuck open when should be closed, and you can solve the problem easily.
Ruud R801T Furnace Error Code
| CODE | Description |
|---|
| 0 | Standby |
| C | Compressor on (cooling or heat-pump heat) |
| H | Gas heat on |
| F | Continuos fan on |
| 10 | 1 hour lockout |
| 11 | Failed ignition |
| 12 | Low flame sense |
| 13 | Flame lost |
| 14 | Unexpected flame |
| 20 | Twinning fault |
| 22 | Main limit open |
| 26 | Line and neutral reversed |
| 33 | Mrlc (manual reset limit control) (aka roll-out) open |
| 55 | Pressure switch stuck closed when should be open |
| 57 | Press switch stuck open when should be closed |
| 61 | Blower fault-blower unable to run |
| 93 | Internal control fault |
Ruud U98V Furnace Error Code
| Flame Led | Status LED | Power LED | DESCRIPTION |
|---|
| OFF | | | No flame is detected |
| Rapid blink | | | Unexpected flame |
| Slow blink | | | Marginal flame sense |
| Steady ON | | | Normal flame detected |
| | OFF | No power (24 VAC) to control board |
| | ON | Control is powered |
| Steady ON | | Normal fault detected |
| 1 Blink | | Ignition failure, 1 HR lockout |
| 2 Blinks | | Pressure switch stuck open, switch will not close when inducer is on |
| 3 Blinks | | Limit switch open, main limit or roll out control |
| 4 Blinks | | Pressure switch stuck closed, switch will not open |
| 5 Blinks | | Not applicable |
| 6 Blinks | | Line and neutral reversed |
Ruud R802P Furnace Error Code
| LED | Code | Solution |
|---|
| FLAME LED | OFF | – No flame is detected. |
| Rapid Blink | – Unexpected Flame |
| Slow Blink | – Marginal Flame Sense |
| Steady ON | – Normal Flame Detected |
| STATUS LED | Steady ON | – Normal Fault detected. |
| 1 Blink | – Ignition failure – 1 HR lockout |
| 2 Blinks | – Pressure switch stuck open switch will not close when inducer is on. |
| 3 Blinks | – Limit switch open main limit or roll-out control. |
| 4 Blinks | – Pressure switch stuck closed. Switch will not open. |
| 5 Blinks | – Not applicable. |
| 6 Blinks | – Line and Neutral reversed |
| POWER LED | OFF | – No power (24VAC) to control board. |
| ON | – Control is powered |
Ruud R96P Furnace Error Code
| LEDS | Flashes | Fault condition |
|---|
| GREEN | ON | Normal operation |
| 1 Flash | Ignition failure (4 trials) |
| 2 Flashes | Pressure switch stuck open |
| 3 Flashes | Limit switches open |
| 4 Flashes | Pressure switch stuck closed |
| 5 Flashes | Twin fault |
| 6 Flashes | Brownout voltage |
| 7 Flashes | Hot and neutral reversed or no ground |
| Continuous | Gas valve relay short |
| YELLOW | Rapid Blink | Flame out of sequence |
| Slow Blink | Low flame or no flame |
| ON | Flame present |
