What to do if Vaillant ecoTEC plus temperature rises too quickly?
If your Vaillant Boiler experiences a rapid temperature increase due to water shortage, the pump may be blocked, have insufficient output, or there might be air in the system, or the water pressure might be too low. Check the pump for blockages and make sure the water pressure is adequate.
What to do if my Vaillant Boiler flame goes off during operation?
If the flame goes off during operation and subsequent ignition attempts fail, it could be due to a temporarily stopped gas supply or faulty earthing of the appliance. Check the gas supply and earth connection.
What to do if my Vaillant Boiler is overheating?
If the overheating protection on the primary heat exchanger is triggered, it could be due to a defective cable or cable connection of the fuse in the primary heat exchanger, or the primary heat exchanger itself being defective. Inspect primary heat exchanger connections.
What to do if the fan is running in my Vaillant ecoTEC plus Boiler?
No action is required if the fan is running in your Vaillant Boiler.
Why is there a large temperature difference in my Vaillant Boiler?
If there's a significant temperature difference between the flow and return NTC in your Vaillant Boiler due to a water shortage, the pump might be blocked or defective, have insufficient output, or the flow and return NTCs may be interchanged. Check the pump for any blockages or defects.
What to do if the heat exchanger antifreeze is active in my Vaillant Boiler?
No action is required if the heat exchanger antifreeze is active in your Vaillant Boiler.
What to do if Safety temperature limiter by NTC is activated on my Vaillant Boiler?
If the safety temperature limiter by NTC is activated on your Vaillant Boiler, it's because the Flow-NTC is not correctly thermal-connected or defective, and the appliance does not shut down. Check and correct thermal connection of Flow-NTC.
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 to do if Vaillant ecoTEC plus has no heat demand?
If your Vaillant Boiler isn't responding to external controls, ensure that all external controls are switched on and are actively requesting heat. If no external controls are installed, make sure terminals 3 and 4 on the boiler are linked.
What to do if my Vaillant ecoTEC plus Boiler electronics temperature is too high?
If the electronics temperature is too high in your Vaillant Boiler, it could be due to the electronics being too hot from an external effect, or the electronics being defective. Ensure proper ventilation for electronics.
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.
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) |
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