Bradford White Error Code F1: Sensor Fault

How to Fix Bradford White Code F1

1. Step 1: Reset the water heater by turning off the power at the breaker for 30 seconds, then turn it back on. This may clear a temporary fault.
2. Step 2: Check the wiring connections on the outside of the unit for any obvious signs of damage or corrosion. Do not open the unit.
3. Step 3: If the error persists after resetting, contact a qualified HVAC technician to diagnose and repair the problem.

How to Reset Bradford White Code F1

1. Turn off the unit using the power button on the front panel.
2. Turn off the gas supply valve.
3. Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
4. Restore power at the breaker, then open the gas valve.
5. Turn the unit back on. If the error returns, the underlying issue needs repair.

Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.

What Does Bradford White Error Code F1 Mean?

The F1 error code on your Bradford White tankless water heater indicates a problem with one of the temperature sensors. These sensors are responsible for monitoring the water temperature at various points within the unit to ensure safe and efficient operation. The F1 code specifically points to a fault in either the inlet or outlet thermistor. When the control board detects an abnormal reading or a complete failure from one of these sensors, it shuts down the unit to prevent potential overheating or other damage. This is a safety feature to protect the unit and your home. Because the unit has locked out, you will not have hot water until the problem is resolved.

Common Causes

• Faulty inlet thermistor
• Faulty outlet thermistor
• Loose or corroded wiring connections to the thermistors or the main control board
• Defective main control board

Diagnostic Steps

Replacement Parts

Related Codes on Same Models

Other codes that affect the same Bradford White model families as F1.