Ruud Furnace Error Code

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

CCompressor on (cooling or heat-pump heat)
HGas heat on
FContinuos fan on
101 hour lockout
11Failed ignition
12Low flame sense
13Flame lost
14Unexpected flame
20Twinning fault
22Main limit open
26Line and neutral reversed
33Mrlc (manual reset limit control) (aka roll-out) open
55Pressure switch stuck closed when should be open
57Press switch stuck open when should be closed
61Blower fault-blower unable to run
93Internal control fault

Ruud U98V Furnace Error Code

OFFNo flame is detected
Rapid blinkUnexpected flame
Slow blinkMarginal flame sense
Steady ONNormal flame detected
OFFNo power (24 VAC) to control board
ONControl is powered
Steady ONNormal fault detected
1 BlinkIgnition failure, 1 HR lockout
2 BlinksPressure switch stuck open, switch will not close when inducer is on
3 BlinksLimit switch open, main limit or roll out control
4 BlinksPressure switch stuck closed, switch will not open
5 BlinksNot applicable
6 BlinksLine and neutral reversed

Ruud R802P Furnace Error Code

FLAME LEDOFF– No flame is detected.
Rapid Blink– Unexpected Flame
Slow Blink– Marginal Flame Sense
Steady ON– Normal Flame Detected
STATUS LEDSteady 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 LEDOFF– No power (24VAC) to control board.
ON– Control is powered

Ruud R96P Furnace Error Code

LEDSFlashesFault condition
GREENONNormal operation
1 FlashIgnition failure (4 trials)
2 FlashesPressure switch stuck open
3 FlashesLimit switches open
4 FlashesPressure switch stuck closed
5 FlashesTwin fault
6 FlashesBrownout voltage
7 FlashesHot and neutral reversed or no ground
ContinuousGas valve relay short
YELLOWRapid BlinkFlame out of sequence
Slow BlinkLow flame or no flame
ONFlame present