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Error code reference

Bradford White Water Heater Error Code Heartbeat

Thermostat calling for heat (no fault)

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What the Heartbeat error code actually means

The Heartbeat indicator on your Bradford White water heater simply means the unit is heating water right now, which is completely normal. Your thermostat detected that the water in the tank cooled down below your desired temperature and told the heater to kick on. There is nothing wrong with your water heater when you see this status.

Diagnostic procedure

The full Heartbeat 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 Heartbeat

Ranked by how often they cause this code
  1. 1Normal hot water demand
  2. 2Thermostat set point too high
  3. 3High household hot water demand
  4. 4Sediment buildup in tank
  5. 5Unit undersized for demand

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Questions people ask about Heartbeat

What does Heartbeat mean on a Bradford White water heater?
The Heartbeat indicator means the thermostat has detected that the tank water temperature is below the set point and is calling for a heating cycle. This is a normal operational status, not an error or fault condition. The indicator will stop once the water reaches the target temperature. No repair or reset is needed.
Is the Heartbeat indicator a safety concern on a Bradford White water heater?
No, the Heartbeat indicator is not a safety concern. It simply means the heater is actively in a normal heating cycle. Safety-related fault codes on Bradford White units are represented by different blink patterns or error codes, not the Heartbeat status.
How much does it cost to repair a Bradford White water heater showing the Heartbeat status?
Because the Heartbeat status indicates normal operation rather than a fault, there is typically no repair cost associated with it. If a technician visit determines that prolonged heating cycles are caused by sediment buildup or a failing thermostat, service costs can range from around 75 dollars to several hundred dollars depending on the parts and labor involved.
How do I fix the Heartbeat status on my Bradford White water heater?
No fix is required because the Heartbeat indicator signals normal operation. If you want to reduce how often or how long the unit heats, you can adjust the thermostat to a lower set point. If the unit seems to heat continuously without ever satisfying, flushing sediment from the tank or reviewing your household hot water demand would be the appropriate next steps.
Will resetting the water heater clear the Heartbeat indicator?
Resetting the unit is not necessary and will not prevent the Heartbeat indicator from returning, since it reflects a real operational condition rather than a stored fault. The indicator will clear on its own once the tank water temperature reaches the thermostat set point. Resetting the unit during an active heating cycle would simply restart the process.

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