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A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Gas Valve Failure

Posted on October 3, 2023

The control system has not detected any current through the gas valve after it has been energized. Turn off power – check all wiring and…

A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Low Igniter Current

Posted on October 3, 2023

The control system has detected less than 2.0 AC amps through the igniter during the igniter warm up period. Check all wiring between CCB’s J5…

A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Blower Prover Open (Blower Is Running)

Posted on October 3, 2023

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

A.O. Smith

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

Posted on October 3, 2023

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…

A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Blower Prover Failure

Posted on October 3, 2023

The control system has detected closed contacts at the Blower Prover air pressure switch out of sequence. Blower Prover air pressure switch contacts should be…

A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Blocked Exhaust Vent

Posted on October 3, 2023

The control system has detected open contacts at the Blocked Exhaust air pressure switch – the water heater is not venting properly. Check for restrictions,…

A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Blocked Inlet

Posted on October 3, 2023

The control system has detected open contacts at the Blocked Intake air pressure switch – inadequate supply of intake (combustion) air. If the water heater…

A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Flame Detect Error

Posted on October 3, 2023

The control system has detected flame sensing current out of sequence. The burner has not shut down properly. Check gas valve for 100% closure. Check…

A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Flame Probe Short

Posted on October 3, 2023

The control system has detected that the flame sensor is grounded. Disconnect the wire from the flame sensor (see pages 12 and 24). Check for…

A.O. Smith

A.O. Smith BTX-100/GDHE-50 – Upper Probe Short

Posted on October 3, 2023

The control system has detected less than 390 ohms from the Temperature Probe on top of the water heater. Check all wiring between the Temperature…

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