J
James Herrera Jr.Sep 1, 2025
What does fault b0 mean on a Viessmann Boiler?
- CCharles StaffordSep 1, 2025
If your Viessmann Boiler displays fault code b0, indicating a short circuit in the flue gas temperature sensor, you should check the sensor.
To Next PageTo Next PageWhat does fault b0 mean on a Viessmann Boiler?
If your Viessmann Boiler displays fault code b0, indicating a short circuit in the flue gas temperature sensor, you should check the sensor.
What does fault code 18 mean on Viessmann B0KA?
Fault code 18 on your Viessmann Boiler indicates a lead break in the outside temperature sensor. Check the outside temperature sensor and lead.
How to resolve fault 52 on Viessmann Boiler?
If your Viessmann Boiler displays fault code 52, which indicates a short circuit in the flow sensor, you should check the connections and lead. If necessary, replace the sensor.
Why Viessmann B0KA burner blocked with error code 52?
If the Viessmann Boiler burner is blocked with error code 52, the cause may be a short circuit in the flow sensor. You should check the connections and leads. If necessary, replace the sensor.
What to do if Viessmann Boiler shows Fault F4?
If your Viessmann Boiler displays Fault F4, you should check the ignition module connection, the gas train (230 V control voltage) and gas supply pressure. Also, check the ionisation current and electrode adjustment, the condensate drain, and the gas line for airlocks.
Why Viessmann B0KA Boiler has no DHW heating with error code 51?
If your Viessmann Boiler is not heating domestic hot water (DHW) and showing error code 51, it could be due to a short circuit in the outlet temperature sensor. Check the sensor (see page 66).
What does fault F8 mean on a Viessmann B0KA Boiler?
If your Viessmann Boiler is displaying fault code F8, which indicates the fuel valve closes too late, you should check the gas train and both control paths.
How to troubleshoot fault F9 on Viessmann B0KA?
If your Viessmann Boiler displays fault code F9, it means the fan speed is too low during burner start. You should check the fan, fan connecting cables, and power supply. Also, check the fan control.
What should I check if my Viessmann Boiler shows fault F4?
If your Viessmann Boiler displays fault code F4, you should check the gas train (ensure the control voltage is 230 V) and verify the gas supply pressure.
How to fix fault F2 on Viessmann B0KA Boiler?
If your Viessmann Boiler is showing fault code F2, which indicates the temperature limiter has responded, you should: 1. Check the heating system fill level. 2. Check the circulation pump. 3. Vent the system. 4. Check the temperature limiter and connecting cables.
General| Model | B0KA |
|---|---|
| Category | Boiler |
| Modulation | Up to 1:6 |
| Fuel Type | Natural Gas |
| Efficiency | Up to 98% AFUE |
