A.O. Smith BTX 100 User Manual (English)

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Questions and Answers:

O
ogonzalesAug 1, 2025
What to do if my A.O. Smith BTX 100 Water Heater control system is not working?
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  Lori ThompsonAug 1, 2025
  If your A.O. Smith Water Heater's control system isn't working, start by checking the on/off switch to ensure it's in the "on" position and working. If your model uses a standard appliance cord, make sure it's plugged into a 120 VAC outlet. Then, check the circuit breaker and fuses. If you're still having issues, verify there's 120 VAC at the wall outlet and that 120 VAC is supplied to CCB’s J3 Socket pins 1 & 3 (hot wire to pin 1, neutral wire to pin 3). If no 24 VAC is present, consider replacing the transformer. Inspect the communication ports on the CCB and UIM for any signs of damage. Finally, try replacing the UIM communication cable with a standard Cat 5 network cable.
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rodriguezjacobAug 10, 2025
How to fix A.O. Smith BTX 100 Water Heater when the control system doesn't respond?
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  Elaine PhamAug 10, 2025
  To fix an unresponsive control system on your A.O. Smith Water Heater, follow these steps: * Ensure the on/off switch is in the "on" position and replace if defective. * Check that the water heater is plugged into a 120 VAC wall outlet (if applicable). * Verify the circuit breaker is on and there are no blown fuses. * Confirm 120 VAC is present at the wall outlet. * Ensure 120 VAC is supplied to CCB’s J3 Socket pins 1 & 3 (hot wire to pin 1, neutral wire to pin 3). * If 24 VAC is absent, replace the transformer. * Inspect communication ports on CCB and UIM for damage. * Replace the UIM communication cable with a standard Cat 5 network cable.
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jean50Aug 20, 2025
Why is my A.O. Smith Water Heater starting and operating roughly?
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  Jessica SmallAug 20, 2025
  If your A.O. Smith Water Heater is starting or operating roughly, several factors could be at play. It may be due to an undersized supply gas line, low or excessive gas pressure, incorrect fuel type, vent gas recirculation, excessive intake air/vent piping, clogged intake air screens, or a blocked main burner. For all of these issues, it's best to contact a qualified installer or service agency for installation and service.