Rinnai 431 heater. Power button will not turn unti on. Unit is pluggen in, the child lock will engage and disengage. No other lights (temp lights etc) are on. Checked all connections on circuit board and transformer. Remeved and chaecked 3 amp fuse on circuitboard
Heating & Cooling - Rinnai - RHFE-431FAIII 16,700 BTU Direct Vent Furnace Energy Saver...
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" If Child Proof Lock is activated during normal operation, then no functions other than the On/Off switch will be operable until the lock is released"
"If Child Proof Lock is activated while the appliance is OFF, then the complete range of functions will be locked"