F.50 error code
Protherm Bear Condens F.50 error code – Flue-pressure switch fault
What does Protherm Bear Condens floor-standing gas boiler F.50 mean?
The flue-pressure switch reports an unsafe exhaust or condensate condition.
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.50 error code indicates the flue-pressure switch reports an unsafe exhaust or condensate condition. 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 burner is inhibited and F.50 appears.
Common causes
A blocked flue system, blocked siphon, or condensate drain that is blocked or routed uphill.
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
Turn the boiler off. Check only the external condensate outlet for obvious freezing if safely accessible; flue and internal condensate work requires an engineer.
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.50 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.50 mean?
The flue-pressure switch reports an unsafe exhaust or condensate condition.
Can I fix Protherm Bear Condens floor-standing gas boiler F.50 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.50?
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.