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Error code reference

Bradford White Water Heater Error Code 1 short flash every 4 seconds

Stand-by mode, waiting for call for heat (no fault)

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What the 1 short flash every 4 seconds error code actually means

This flash pattern means your water heater is working normally and the water in the tank is already at the temperature you have set. The heater is simply waiting until you use hot water and the tank needs to reheat. There is nothing wrong, and no action is required unless you want hotter water.

Diagnostic procedure

The full 1 short flash every 4 seconds procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Normal operation. Adjust thermostat to desired temperature level.
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of 1 short flash every 4 seconds

Ranked by how often they cause this code
  1. 1Temperature demand already satisfied
  2. 2Thermostat set lower than desired
  3. 3Recent low hot water demand period
  4. 4Unit recently completed a heating cycle

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Questions people ask about 1 short flash every 4 seconds

What does 1 short flash every 4 seconds mean on a Bradford White water_heater?
This flash pattern indicates the water heater is in normal standby mode. The water temperature inside the tank has reached the thermostat setpoint, so the burner is not firing. The control board is powered and monitoring the system, waiting for the water temperature to drop before initiating another heating cycle. No fault or malfunction is present.
Is it safe to use my water heater when it shows 1 short flash every 4 seconds?
Yes, this condition is completely safe. The unit is operating normally and the control system is functioning as designed. There is no error, no overheating, and no component failure associated with this flash pattern. You can continue using hot water as usual.
What does it cost to address a 1 short flash every 4 seconds condition on a Bradford White water heater?
There is no cost associated with this condition because it indicates normal operation rather than a fault. If the concern is that the water temperature is not high enough, the only step needed is adjusting the thermostat dial, which costs nothing. If after adjusting the thermostat the unit still does not heat adequately and a different fault code appears, further diagnostics may be warranted at that point.
Do I need to fix anything when I see this flash pattern?
No repair is needed for this flash pattern. It is a status indicator, not a fault code. If you are satisfied with your current hot water temperature, simply leave the unit as is. If you want hotter water, adjust the thermostat to a higher setting and give the unit time to heat the full tank to the new target.
Will resetting the water heater clear this flash pattern?
Resetting the unit is unnecessary because this is not a fault code that needs clearing. The flash pattern will change on its own once cold water enters the tank and the thermostat calls for heat, at which point the burner will ignite and the indicator will reflect active operation. Performing a reset would not change the underlying status.

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