Fault: Three Flash, three second pause. Vent blockage or improper installation, switch tube blockage, faulty switch, blower improper operation or temperature switch open
Applies To: Rheem Professional 50 Gal. Classic Power Vent Natural Gas Water Heater 42,000 BTUH Side T and P Relief Valve
This water heater incorporates a combustion shut off device that shuts the operation of the water heater down if undesirable combustion conditions occur, such as the presence of flammable vapors or blockage of the combustion air inlet openings.
CAUTION: Make certain power to water heater is “OFF” before removing protective cover FOR ANY REASON.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. VERIFY PROPER OPERATION AFTER SERVICING.
CAUTION: For your safety DO NOT attempt repair of gas piping, gas control (thermostat), burners, vent connectors or other safety devices.