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Error code reference

Bradford White Water Heater Error Code 2 flash

Damper test circuit not working; damper not in proper position or malfunctioning, stuck in open position.

Bradford White codesBradford White water heater codes
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What the 2 flash error code actually means

Your water heater has detected a problem with the flue damper, which is a small motorized flap that opens before the burner lights to allow exhaust gases to escape safely. The heater is not getting confirmation that this damper is in the correct open position, so it is refusing to operate as a safety precaution. This could be something as simple as a loose plug, or it may mean the damper itself needs to be replaced.

Diagnostic procedure

The full 2 flash procedure

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1
First diagnostic step
Verify cord sets are fully plugged in; verify switch on damper is in Automatic position; replace damper if needed (see page 16).
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Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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Most common causes of 2 flash

Ranked by how often they cause this code
  1. 1Loose or disconnected cord set
  2. 2Damper switch not in Automatic position
  3. 3Damper stuck in closed or intermediate position
  4. 4Faulty damper position switch
  5. 5Damaged or broken wiring to the damper

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Questions people ask about 2 flash

What does 2 flash mean on a Bradford White water heater?
The 2-flash code indicates the damper test circuit is not working correctly, meaning the control board cannot confirm the flue damper is in the proper open position. This fault prevents the burner from firing as a safety measure. The problem may stem from a loose cord set connection, an incorrectly positioned switch on the damper, or a mechanically failed damper assembly.
Is it safe to use my water heater when it shows a 2-flash code?
No, you should not attempt to bypass or ignore this fault. The damper is a critical safety component that ensures combustion exhaust gases vent properly before the burner ignites. The control board is intentionally preventing operation until the damper position is confirmed. Running the unit with a faulty damper could allow exhaust gases to accumulate in the living space.
How much does it cost to fix a 2-flash damper fault on a Bradford White water heater?
If the fix is simply reseating a loose connector or repositioning the damper switch, there is no parts cost involved. If the damper assembly needs to be replaced, parts typically range from around $80 to $200 or more depending on the model, with professional labor adding to the total. Getting a quote from a licensed plumber or appliance technician before proceeding is recommended.
How do I fix a 2-flash error on my Bradford White water heater?
Start by checking that all cord sets connected to the damper are fully and firmly plugged in at both ends. Next, locate the switch on the damper housing and confirm it is set to the Automatic position. If these steps do not clear the fault, the damper assembly itself may be stuck or internally failed and will need to be replaced, as detailed in the installation and service documentation for your unit.
Will resetting my Bradford White water heater clear the 2-flash error?
A reset alone is unlikely to clear this error if the underlying problem has not been addressed. The control board performs the damper test during every startup cycle, so the fault will return each time the unit tries to light unless the cord set connection, switch position, or damper itself has been corrected. Resolve the root cause before attempting a reset.

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