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

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