Bradford White Overheating / Thermostat Out of Calibration

Bradford White gas water heater produces water that is too hot; risk of scalding.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Gas control thermostat out of calibration, ECO not tripping at correct temperature, Misadjusted mixing valve, Stuck gas valve allowing continuous firing

How to Fix / Troubleshooting

Safety: High water temperature can cause severe burns. Warn occupants and consider turning off the heater until corrected.

Steps:

  • Lower thermostat setting: Turn the gas control dial to a lower setting (e.g., from hot to warm). Allow several hours and recheck temperature at a faucet with a thermometer.
  • Check mixing valve: If a thermostatic mixing valve is installed on the outlet, verify its setting and adjust to 120°F output.
  • Monitor burner operation: If the burner continues to run even when water is very hot, the gas control valve may be stuck and must be replaced.

Do not ignore overheating. If temperature cannot be controlled with normal adjustments, contact a technician to replace the gas control valve and verify ECO operation.

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Repair Difficulty

Medium 3/5

Required Part

Gas Control Valve / Thermostat
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