Troubleshoot error code “F7” in Fagor boiler

How to eliminate F7 error in boiler Fagor?

  • Error: F7
  • Description: Indicates that the primary circuit’s outlet temperature has exceeded 105º C, and the boiler locks to prevent damage. The pump continues to operate until the temperature drops to 85º C. This error usually occurs with the burner running or shortly after it turns off.
  • Cause: It may be due to a thermistor failure, inefficient purging, or a misadjusted regulation (very high minimum).
  • Solution: Check and correct the thermistor’s operation, ensure the system is properly purged, and adjust the regulation.

When your Fagor boiler displays the F7 error code, it’s important to understand what it means and how to resolve it. Below is a step-by-step guide to address this issue:

What to Do When Facing the F7 Error?

Step 1: Boiler Unlocking

  1. Turn the main switch to the “O” position.
  2. Return the switch to the previous position.
  3. Ensure the red pilot light goes out, and the pressure is displayed again on the digital display.

Following these steps should return the boiler to its normal operating state before the fault.

Step 2: Verification and Addressing Causes

  1. Thermistor Failure: Replace the thermistor if damaged.
  2. Inefficient Purging: Properly purge the radiators and the heating circuit.
  3. Misadjusted Regulation: Correctly adjust the regulation following the manufacturer’s instructions.

Step 3: Contact a Specialist

If the problem persists, contact a specialist in Fagor boilers for a more detailed diagnosis and repair.

Additional Tips

  • Regular Maintenance: Perform regular maintenance on the boiler to prevent the occurrence of errors.
  • Consult the Manual: Refer to your boiler’s manual to follow recommended maintenance instructions.
  • Do Not Ignore Other Error Codes: Address any other error codes displayed by the boiler to prevent major issues.

Remember, at, we are here to assist you with any questions or issues you may have with your appliances. Feel free to visit us for more information and technical assistance.

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