What to do if the safety thermostat (STL) has shut down my Vaillant ecoCRAFT VKK GB Boiler due to high temperature?
If the safety thermostat (STL) has automatically shut down the boiler due to high temperature, reset the STL by pushing the pin after removing the front cover.
How to troubleshoot no display on the Vaillant ecoCRAFT VKK GB Boiler control panel?
If there is no display on the control panel, check the 4 AT fuse in the boiler controller. Also, verify that the main switch is turned on and that there is an electrical connection of 230 V/50 Hz at the connection plug.
General| Boiler Type | Condensing |
|---|---|
| Fuel Type | Natural Gas |
| Mounting | Floor Standing |
| Fuel | Natural Gas |
| Type | System |
| Efficiency | Up to 98% |
| Warranty | 2 years |
Storing the operating manual and other documents for accessibility.
Explains important safety symbols used in the manual.
Specifies the article numbers to which the manual applies.
Describes the location and purpose of the appliance's identification plate.
Details the directives the appliance complies with, indicated by the CE label.
Provides steps to follow if gas is smelled or there is a malfunction.
General safety instructions and warnings regarding gas and electrical hazards.
Covers appliance installation, power supply, and frost protection measures.
Outlines specific regulations and standards for appliance installation.
Details Vaillant's warranty terms and conditions for the appliance.
Defines the proper and improper uses of the ecoCRAFT boilers.
Specifies boiler room installation, frost-proofing, and clearances.
Instructions for cleaning the appliance casing safely.
Guidance on proper disposal of the appliance and its packaging.
Provides advice on efficient operation and reducing energy consumption.
Heating hot water only as much as needed to save energy.
Tips for reducing water consumption and costs.
Advice on operating circulation pumps only when necessary.
Proper ventilation techniques to save energy and avoid heating activation.
Identifies and explains the functions of the appliance's control panel buttons and display.
Steps to take before starting the appliance for the first time.
Explains the importance of isolator devices fitted by the heating engineer.
Details how to check and maintain correct heating system pressure.
Step-by-step guide on how to switch the appliance on and off.
Requirements and settings for preparing hot water using a connected cylinder.
How to set the desired hot water temperature using the rotary knob.
Method to turn off hot water generation while keeping heating active.
How hot water is supplied from the connected tank when a tap is opened.
General section on adjusting heating mode settings.
How to set flow temperature based on outside temperature without a controller.
Instructions for setting flow temperature when using a VRC 430 controller.
How to disable heating mode for summer while keeping hot water ready.
How to set room thermostats or weather compensators for heating control.
Explains how to view and interpret the appliance's status codes and messages.
Guide to diagnosing and resolving common operational problems.
Describes error messages and actions for low system pressure issues.
Explains ignition failures, error codes (F.28/F.29), and how to reset.
Details issues related to blower faults and air/flue gas system errors (F.3x).
Instructions on correctly filling the heating system and potential risks.
Steps to take to shut down the gas-fired condensing boiler.
General information on protecting the system from frost.
Explains the built-in frost protection system and its limitations.
Describes draining the system and appliance as a frost prevention method.
How to perform maximum output measurements, typically by a chimney sweep.
Importance of annual maintenance by a heating engineer for reliability.
Emphasizes annual inspections and maintenance for optimal performance and safety.
Recommendation to arrange a maintenance agreement with Vaillant Service.
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