Rinnai Infinity fault codes

Every checked code for the Rinnai Infinity range, with what it means and whether you can fix it yourself.

Fault codes

Code	Meaning	What you can do
03	Power cut during bath fill	You can often fix it
05	Bypass flow control failure	Safe checks first, then a pro
10	Air intake, flue or condensate blockage	Safe checks first, then a pro
11	No ignition	Safe checks first, then a pro
12	Flame failure or low gas flow	Safe checks first, then a pro
14	Overheat safety device tripped	Call a pro
15	Venturi control failure	Safe checks first, then a pro
16	Over-temperature shutdown	Safe checks first, then a pro
17	Venturi blockage	Safe checks first, then a pro
19	Electrical earth fault	Call a pro
21	Data transfer or dip switch error	Call a pro
25	Sensor fault or condensate blockage (depends on model)	Depends on your model
32	Outgoing water temperature sensor fault	Call a pro
33	Heat exchanger thermistor fault	Call a pro
34	Temperature sensor fault (depends on model)	Call a pro
38	Exhaust temperature thermistor fault	Call a pro
41	Frost protection (ambient) sensor fault	Call a pro
51	Inlet water thermistor fault	Call a pro
52	Gas modulating valve fault	Call a pro
54	High exhaust gas temperature	Safe checks first, then a pro
55	Service reminder	Safe checks first, then a pro
61	Combustion fan failure	Call a pro
65	Water flow control failure	Safe checks first, then a pro
66	Bypass flow control fault	Call a pro
70	Control board (PCB) failure	Safe checks first, then a pro
71	Gas solenoid valve failure	Call a pro
72	Flame rod circuit error	Call a pro
LC	Scale build-up in the heat exchanger	Safe checks first, then a pro
SE	Cascade connection failure	Call a pro