A.O. Smith BTX-100/GDHE-50 – Blower Prover Open (Blower Not Running)

The control system has detected open contacts at the Blower Prover air pressure switch after Blower has been energized.

PERFORMTURNEDALL THESE TESTS WITH POWER ON AND A CALL FOR HEAT ACTIVE.

Check for 120 VAC at the CCB’s J2 Socket (page 36) pins 1 & 2. Perform close visual inspection of the pins inside the plug and socket – ensure plugs and sockets are mating properly and providing good contact.

Check all wiring between CCB’s J2 Socket pins 1 & 2 and the blower motor assembly’s high voltage 3 Pin Socket (see page 10). Disconnect the plug at the blower motor assembly’s high voltage 3 Pin Socket – check for 120 VAC at the plug end.

Perform close visual inspection of the pins inside the plug and socket at the blower motor assembly’s high voltage 3 Pin Socket – ensure plugs and sockets are mating properly and providing good contact.

Disconnect the plug at the blower assembly’s Low Voltage PWM 5 pin plug (see page 10). If the Blower has not been running prior and starts running when this plug is disconnected – call the technical support phone number shown on the water heater labeling for further assistance.