A.O. Smith BTR 120-400

Questions and Answers

K
Katie WiseAug 12, 2025
Why is there insufficient hot water from my A.O. Smith BTR 120-400 Water Heater?
- T
  Tamara GriffinAug 12, 2025
  If you're not getting enough hot water from your A.O. Smith Water Heater, first, make sure the thermostat isn't set too low by adjusting it to a higher temperature. Also check if the main manual gas shutoff valve is fully opened. If the heater is too small for your needs, try spacing out your usage to allow the heater more time to reheat the water.
W
William WrightAug 16, 2025
How to fix not hot enough water in A.O. Smith BTR 120-400?
- V
  Victor ButlerAug 16, 2025
  If your A.O. Smith Water Heater isn't heating water enough, try adjusting the thermostat to a higher temperature. If the problem persists, it could be due to upper or lower temperature probes being out of calibration, in which case you should call a qualified service agency to check and replace them if necessary.
S
Sherry KellyAug 19, 2025
How to stop water leaks from A.O. Smith BTR 120-400?
- D
  Desiree DavenportAug 20, 2025
  If your A.O. Smith Water Heater is leaking water, it might be due to the drain valve not being closed tightly. Try closing it tightly, and if it still leaks, replace the valve. If you cannot identify the source of the leak, shut off the gas and cold water supply to the heater and call a qualified service agency.
J
Joshua SavageAug 23, 2025
What to do if water temperature is too hot in A.O. Smith Water Heater?
- M
  Michael BrownAug 23, 2025
  If the water from your A.O. Smith Water Heater is too hot, the thermostat might be set too high. Try setting the thermostat to a lower setting.
S
stokesrobertAug 27, 2025
What to do if I smell gas odors from A.O. Smith Water Heater?
- B
  bcampbellAug 27, 2025
  If you notice gas odors coming from your A.O. Smith Water Heater, it could be due to the heater being overfired or possible gas leaks. Immediately shut off the gas supply to the heater and call a qualified service agency or your gas company.
K
Kimberly ScottAug 31, 2025
Why is my A.O. Smith BTR 120-400 Water Heater rumbling?
- V
  valdezangelaAug 31, 2025
  If your A.O. Smith Water Heater is making rumbling noises, it's likely due to sediment accumulation at the bottom of the tank. Try draining some water through the drain valve to remove the sediment. If the rumbling continues, you may need to call a qualified service agency to delime the heater.
C
Christian MasonSep 4, 2025
What causes pounding or water hammer in A.O. Smith Water Heater?
- A
  Amy KingSep 4, 2025
  If your A.O. Smith Water Heater is making pounding or water hammer noises, it could be because the air chambers in the piping have become waterlogged, or the thermal expansion tank is damaged, improperly charged, or improperly sized. Try draining the piping system and refilling it, making sure the heater is off during this process. Also, check the thermal expansion tank charge pressure when the water system pressure is zero.
L
lesliebrownSep 7, 2025
What causes combustion noises in A.O. Smith BTR 120-400?
- F
  Frank JacksonSep 8, 2025
  Combustion noises in your A.O. Smith Water Heater may be caused by too much primary air. Try adjusting the shutters. Alternatively, the heater might be overfired or have incorrect burners for the gas type used, which requires a call to a qualified service agency for checking and correction.