How to fix 'No pellet or STB' error on my ThermoFLUX PELLING 35 ECO Boiler?
- TTeresa SmithAug 15, 2025
If your ThermoFLUX Boiler displays a 'No pellet or STB' error, first refill the pellet tank. Then, deactivate the STB.
How to fix 'No pellet or STB' error on my ThermoFLUX PELLING 35 ECO Boiler?
If your ThermoFLUX Boiler displays a 'No pellet or STB' error, first refill the pellet tank. Then, deactivate the STB.
Why is my ThermoFLUX Boiler showing an exhaust fan error, HALL sensor error, and STB activated?
This error indicates that the ThermoFLUX Boiler temperature has exceeded 90°C. Allow the boiler to cool down, and then reset the STB.
What to do if my ThermoFLUX PELLING 35 ECO Boiler shows a 'High temperature' error?
If your ThermoFLUX Boiler displays a high temperature error, it could be due to a crowded burning pot or a dirty boiler. Try cleaning the boiler and ensure the burning pot is not overcrowded.
What to do if my ThermoFLUX PELLING 35 ECO displays 'Not fire on'?
If your ThermoFLUX Boiler isn't igniting, here are a few things to check: 1. Verify the pellet quality. 2. Ensure there are pellets in the pellet tank. 3. Confirm the pellet burner pot is correctly positioned. 4. Clean the burning pot. 5. Check if the igniter is functioning.
What to do if my ThermoFLUX Boiler displays 'Under pressure/ Door open(Pelling 25)'?
If your ThermoFLUX Boiler (Pelling 25) is showing an under-pressure or door open error, you can try the following: 1. Ensure that all doors are completely closed. 2. Clean the burning pot and exhaust pipes. 3. Check for any blockage in the chimney. It may also indicate a Presostat (Underpressure sensor) error.
What to do if my ThermoFLUX Boiler displays 'Flame sensor error'?
If your ThermoFLUX Boiler is showing a flame sensor error, check the contacts.
What to do if my ThermoFLUX PELLING 35 ECO Boiler displays 'Room Temperature Sensor error (only Minitherm air)'?
If your ThermoFLUX Boiler (Minitherm air) shows a Room Temperature Sensor error, check the contacts.
What to do if my ThermoFLUX PELLING 35 ECO displays 'Boiler water sensor (Pelling 25 and Minithem AQUA)' error?
If your ThermoFLUX Boiler (Pelling 25 and Minithem AQUA) displays a Boiler water sensor error, check the contacts on the boiler.
What to do if my ThermoFLUX PELLING 35 ECO Boiler displays 'Door open'?
If your ThermoFLUX Boiler indicates that the door is open, make sure to close the door properly.
Information on correct and safe use of the boiler, including principles and modes of operation.
Boiler built with advanced technologies, following safety regulations; misuse can cause injury or death.
The boiler is designed for wood pellet and wood; manufacturer accepts no responsibility for damage from improper use.
Only wood pellets and wood are permissible fuels; recommendations for pellet quality and dimensions.
Identifies residual risks such as carbon monoxide emission and hot surfaces.
Explains the various warning and safety symbols used throughout the manual.
Explains the fundamental working principle of the Pelling boiler.
Instructions on how to safely power the boiler on and off.
Guide to navigating and adjusting various settings within the boiler's menu.
Description of the safety thermo breaker (STB) and master fuse for overheating protection.
Troubleshooting for 'No pellet or STB' error, including solutions like filling the tank.
Troubleshooting for 'Not fire on' error, covering pellet quality, burner pot, and igniter.
Troubleshooting for 'Door open' error, with the solution being to close the door.
Troubleshooting for 'High temperature' error, suggesting cleaning and checking the boiler.
Troubleshooting for exhaust fan or hall sensor errors, and STB activation.
Troubleshooting for flame sensor errors, primarily checking contacts.
Troubleshooting for Room Temperature Sensor errors, involving checking contacts.
Troubleshooting for Boiler water sensor errors, requiring checking contacts on the boiler.
Troubleshooting for pressure or door open errors, including checking doors and chimney.
Detailed explanation of the STB function and how to reset it.
| Fuel Type | Wood pellets |
|---|---|
| Nominal Heat Output | 35 kW |
| Efficiency | 92% |
| Maximum Working Pressure | 3 bar |
| Power Supply | 230V / 50Hz |
| Emission Class | 5 |
| Flue Gas Temperature | 160 °C |