What to do if my Vaillant Boiler has a Flow–NTC open circuit?
If your Vaillant Boiler has a Flow–NTC open circuit, it could be due to a broken NTC, a broken NTC cable, a defective connection at the NTC, or a defective connection at the electronics. Check NTC and its connections.
What does it mean if my Vaillant Boiler reports Flow and/or return NTC fault?
If your Vaillant Boiler reports a Flow and/or return NTC fault, it means the Flow and/or return NTC is defective (tolerances too big). Replace the Flow and/or Return NTC.
What does it mean if my Vaillant ecoTEC plus Flow NTC reports a constant value?
If the Flow NTC in your Vaillant Boiler reports a constant value, it means the Flow NTC is defective. Replace the Flow NTC.
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.
What does it mean if my Vaillant ecoTEC plus reports Electronics/NTC fault?
An Electronics/NTC fault in your Vaillant Boiler indicates a short-circuit in the flow or return NTC, or defective electronics. Check and replace electronics or NTC.
What causes a Vaillant ecoTEC plus gas valve shut off delay?
A gas valve shut off delay in your Vaillant Boiler can be caused by a leaking gas valve or defective electronics. Check the gas valve for leaks and inspect electronics.
What causes a Vaillant Boiler to have a defective gas-valve control?
A defective gas-valve control in your Vaillant Boiler can be caused by a short circuit or earth leak in the cable harness to the gas valves, a defective gas valve assembly, or defective electronics. Inspect gas valve connections and components.
What does 'eBUS under voltage' mean on my Vaillant ecoTEC plus?
An 'eBUS under voltage' error indicates a short circuit on the eBUS, an overload on the eBUS, or two power sources on the eBUS with different polarity. Check eBUS connections and ensure correct polarity.
What to do if my Vaillant Boiler shows water shortage and quick temperature rise?
If your Vaillant Boiler indicates a water shortage and a rapid temperature increase, it may be due to a blocked pump, insufficient pump output, air in the appliance, or water pressure that is too low. Bleed the system and check water pressure.
What to do if my Vaillant Boiler shows water shortage and large temperature difference?
A water shortage with a large temperature difference between the flow and return NTC in your Vaillant Boiler could be caused by a blocked or defective pump, the pump output being too low, or the flow and return NTCs being interchanged. Check pump and NTC placements.
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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