F.27 error code
Protherm Bear Condens F.27 error code – False flame signal
What does Protherm Bear Condens floor-standing gas boiler F.27 mean?
The electronics detect a flame signal while the gas valve should be closed.
The code identifies the condition detected by the product; it does not always identify the failed component on its own. Confirm the full code and exact model before ordering parts or attempting a reset.
The Protherm Bear Condens floor-standing gas boiler F.27 error code indicates the electronics detect a flame signal while the gas valve should be closed. This guide explains what the code means, the symptoms and likely causes, the checks that are safe to make, and when to stop and arrange an authorised repair.
Symptoms you may notice
The boiler locks out with F.27.
Common causes
Flame detection with the gas valve closed or an electronics fault.
Before you start troubleshooting
Use the display, rating label or product menu to confirm the exact model. Similar-looking codes can have different meanings across product generations and regions.
- Record the complete code before switching the equipment off.
- Check only user-accessible controls, filters and external connections described in the manual.
- Do not open gas, refrigerant, combustion or electrical compartments.
Troubleshooting steps
Do not attempt a reset cycle repeatedly. Isolate the appliance and arrange professional checks of flame detection, gas-valve operation and electronics.
Can you fix this error code yourself?
The safest next step depends on the exact model and the cause behind the code. External checks may help, but a returning fault needs professional diagnosis.
A successful reset is not proof that the underlying issue is fixed. If F.27 reappears, note when it happens and give that information to the service engineer.
Reset instructions
After the underlying fault has been corrected, press and hold the fault-reset button for more than three seconds. Do not repeatedly reset a returning fault.
Applicable products and models
Bear Condens floor-standing gas boiler18KKS; 25KKS; 35KKS; 48KKSWhen to contact a professional
Arrange a qualified Protherm service engineer if the fault returns after one permitted reset, if gas or flue components are involved, or if diagnosis requires internal electrical or combustion checks.
Frequently asked questions
What does Protherm Bear Condens floor-standing gas boiler F.27 mean?
The electronics detect a flame signal while the gas valve should be closed.
Can I fix Protherm Bear Condens floor-standing gas boiler F.27 myself?
Some external checks may be suitable for the user, but the result depends on the exact model and cause. Use the official manual and arrange service if the code returns.
Should I reset the product after code F.27?
After the underlying fault has been corrected, press and hold the fault-reset button for more than three seconds. Do not repeatedly reset a returning fault.
When should I arrange a repair?
Arrange a qualified Protherm service engineer if the fault returns after one permitted reset, if gas or flue components are involved, or if diagnosis requires internal electrical or combustion checks.