What to do if my Vaillant ecoTEC plus Boiler has no heat demand?
To resolve the issue of no heat demand in your Vaillant Boiler, check that all external controls are on and calling for heat. If no external controls are fitted, boiler terminals 3 and 4 must be linked.
What happens if the filling pressure is too low in my Vaillant Boiler?
If the display of the filling pressure for your Vaillant Boiler's heating system is too low, and it falls below 0.05 MPa (0.5 bar), the boiler will switch off and show the fault message F.22. To restart the boiler, you need to fill the heating system with water.
How to fix a Vaillant ecoTEC plus Boiler when the start up ignition is unsuccessful?
If your Vaillant Boiler fails to start up due to unsuccessful ignition, you can manually reset the boiler by pressing and holding the reset button for one second. If resetting the boiler three times doesn't resolve the ignition problem, it's recommended to consult a qualified professional.
General| Model | ecoTEC plus |
|---|---|
| Category | Boiler |
| Type | Condensing |
| Dimensions (H x W x D) | 720mm x 440mm x 338mm |
| ErP Rating | A |
| Mounting | Wall-mounted |
| Output Range | 12kW to 38kW |
| Fuel Type | Natural Gas |
| Domestic Hot Water Output | 38kW |
| Flow Rate | 15.9 l/min |
| NOx Emissions | Class 5 |
| Efficiency | 94% (SAP 2009) |
Explains the classification of warnings by severity (Danger, Warning, Caution) and the structure of warning messages.
Defines the proper and improper uses of the Vaillant ecoTEC plus boiler and the manufacturer's liability.
Covers installation, gas/flue gas safety, preventing scalding, material damage, and frost damage.
Introduces the control elements of the ecoTEC plus and the Digital Information and Analysis System (DIA).
Instructions for opening/closing isolator devices and switching the boiler on, with frost protection warnings.
Guidance on checking the heating system's fill level and the procedure for filling it, including water quality advice.
Guidance on temporarily shutting down the boiler and activating frost protection, including draining the system.
Explains how fault codes and plain text messages are displayed and what to do when they appear.
Provides a table for self-checking common problems like no hot water, heating failure, or low system pressure.
Addresses resolving ignition faults and recognizing maintenance messages, advising professional help when needed.
Emphasizes the importance of annual servicing by a qualified professional for optimal performance and longevity.
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