What to do if my Viessmann Boiler shows fault F4?
If your Viessmann Boiler displays fault code F4, there are several potential solutions: * Check the ignition module connection. * Check the gas train (control voltage 230 V) and the gas supply pressure. * Check the ionisation current, the electrode adjustment, and the gas line for air-locks.
What to do if my Viessmann Vitodens 100-W shows displayed fault code 52?
If your Viessmann Boiler is showing fault code 52, check the connections and lead to the flow sensor. If necessary, replace the sensor.
What does fault code 50 mean on my Viessmann Boiler?
If your Viessmann Boiler displays fault code 50, it indicates a short circuit in the cylinder temperature sensor. You should check the sensor.
How to fix fault F9 on a Viessmann Boiler?
To address fault F9 on your Viessmann Boiler, check the fan, the fan connecting cables, the power at the fan, and the fan control.
Why does my Viessmann Vitodens 100-W burner stop and restart quickly?
If your Viessmann Boiler burner stops below the set boiler water temperature and restarts immediately, check the flue system for tightness (flue gas recirculation) and the gas flow pressure.
What does fault code 51 mean on my Viessmann Vitodens 100-W Boiler?
If your Viessmann Boiler displays fault code 51, it means there is a short circuit in the outlet temperature sensor. Check the sensor.
What does fault code 30 mean on my Viessmann Boiler?
If your Viessmann Boiler displays fault code 30, it indicates a short circuit in the boiler water temperature sensor. Check the boiler water temperature sensor.
How to troubleshoot fault F4 on a Viessmann Boiler?
If your Viessmann Boiler is showing fault F4, check the ignition module connection.
What does fault code 38 mean on my Viessmann Vitodens 100-W Boiler?
If your Viessmann Boiler displays fault code 38, it indicates a lead break in the boiler water temperature sensor. Check the boiler water temperature sensor.
What does fault code 18 mean on my Viessmann Vitodens 100-W?
If your Viessmann Boiler displays fault code 18, it indicates a lead break in the outside temperature sensor. Check the outside temperature sensor and lead.
General| Type | Wall-mounted gas condensing boiler |
|---|---|
| Installation | Wall-mounted |
| Fuel Type | Natural gas or LPG |
| Heat Exchanger Material | Stainless steel |
| Efficiency | Up to 98% |
| Warranty | Up to 10 years (depending on installation and usage) |
| Control | Vitotronic control unit with LCD display |
| Dimensions | 700mm x 400mm x 350mm |
| Heating Output | 1.9 to 35 kW |
Explains warning symbols and provides initial safety advice.
Actions for gas or flue gas leaks to prevent hazards.
Procedures for system isolation and warnings about component use.
Vitodens 100-W models, features, and technical data.
Physical dimensions, installation clearances, and flue system requirements.
Hydraulic circuit diagrams and electrical supply requirements.
Boiler position, flue terminal location, and connection preparation.
Steps for mounting boiler and making gas, heating, condensate connections.
Steps for installing external wall and vertical roof flue terminals.
Electrical connections, testing, and boiler water temperature settings.
Advice on operation, controls, and maintenance for the user.
Servicing recommendations and steps for front panel removal.
Procedures for burner removal, inspection, and electrode checks.
Heating surface cleaning and condensate drain/siphon checks.
Boiler start-up after service and final checks.
Flowcharts and tables for identifying and resolving faults.
Steps for checking and repairing sensors and limiters.
Steps to check the fuse (F1) in the control unit.
Diagrams showing electrical connections and component layouts.
Instructions for identifying and ordering spare parts with diagrams.
Checklist for boiler commissioning, including system and control checks.
Section for recording service history and engineer details.
Declaration of conformity with standards and directives.
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