Rinnai Energysaver FDT commercial flued gas heater fault codes

Every checked code for the Rinnai Energysaver FDT commercial flued gas heater range, with what it means and whether you can fix it yourself.

Fault codes

Code	Meaning	What you can do
11	Ignition failure	Safe checks first, then a pro
12	Flame failure	Safe checks first, then a pro
14	Filter blocked or overheat	You can often fix it
16	Room overheat	You can often fix it
30	Overheat temperature sensor fault	Safe checks first, then a pro
31	Room temperature sensor fault	Safe checks first, then a pro
32	Room temperature sensor fault	Safe checks first, then a pro
33	Overheat temperature sensor fault	Safe checks first, then a pro
34	Overheat temperature sensor fault	Safe checks first, then a pro
35	Overheat temperature sensor fault	Safe checks first, then a pro
40	Sensor tube failure	Call a pro
49	Sensor breakdown	Safe checks first, then a pro
53	Spark sensor fault	Call a pro
61	Combustion fan fault	Safe checks first, then a pro
62	Convection fan fault	Safe checks first, then a pro
70	On/Off switch fault	Call a pro
71	Gas solenoid fault	Call a pro
72	Flame detection circuit fault	Call a pro
73	Communication error	Safe checks first, then a pro
81	Gas solenoid fault	Call a pro
99	Flue terminal blocked	Safe checks first, then a pro