A.O. Smith BTH 300 - FAULT AND ALERT MESSAGES; Ignition Failure; Low Gas Pressure; Blocked Air Intake

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FAULT AND ALERT MESSAGES
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POSSIBLE CAUSES - CHECK/REPAIR DISPLAYED FAULT/ALERT MESSAGE
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ADVANCEDBACK
0 days 0 hr 0 min ago
Error Code: B2-70
Ignition Failure
Flame not detected. Clean flame
rod. Check gas supply.
Press the Advanced button for
more information
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ADVANCEDBACK
0 days 0 hr 0 min ago
Error Code: A6-501
Low Gas Pressure
Low Gas Pressure
Press the Advanced button for
more information
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ADVANCEDBACK
0 days 0 hr 0 min ago
Error Code: A7-1201
Blocked Air Intake
Restriction in air intake.
Check intake pipe and
termination for blockage.
Press the Advanced button for