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 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 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.
Why is my Vaillant ecoTEC plus Boiler not starting up, and there's no hot water or heating?
If your Vaillant Boiler isn't starting, resulting in no hot water and cold heating, several factors could be at play. First, ensure that both the on-site gas isolator cock and the product's gas isolator cock are open. Next, check if there's a power supply issue in your building by inspecting the fuse. If the boiler is switched off, turn it on. Also, verify that the heating flow and hot water temperatures are appropriately set. If these steps don't resolve the issue, there might be air in the heating installation, which requires purging by a professional. Finally, if the boiler enters fault mode (F.28) after three failed ignition attempts, press the fault clearance key. If the ignition fault persists after three clearance attempts, seek professional assistance.
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 to do if my Vaillant ecoTEC plus Boiler has a Return–NTC open circuit?
If your Vaillant Boiler has a Return–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 to do if my Vaillant Boiler has a Flow NTC short circuit?
If your Vaillant Boiler has a Flow NTC short circuit, it could be due to a defective NTC, a short circuit in the cable harness, or a cable/casing short cut. Check for short circuit in cable harness or NTC.
What to do if my Vaillant ecoTEC plus Boiler has a Return NTC short circuit?
If your Vaillant Boiler has a Return NTC short circuit, it could be due to a defective NTC, a short circuit in the cable harness, or a cable/casing short cut. Check for short circuit in cable harness or NTC.
What to do if my Vaillant Boiler has a Tank NTC short circuit?
If your Vaillant Boiler has a Tank NTC short circuit, it could be due to a defective NTC, a short circuit in the cable harness, or a cable/casing short cut. Check for short circuit in cable harness or NTC.
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.
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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