What could cause overheating protection on the primary heat exchanger in my Vaillant ecoTEC plus Boiler?
If the overheating protection on the primary heat exchanger is triggered in your Vaillant Boiler, and there is damage in the primary heat exchanger, it may be due to a defective cable or cable connection of the fuse in the primary heat exchanger. Inspect and replace the primary heat exchanger as necessary.
What to do if my Vaillant ecoTEC plus Boiler appliance does not start and ignition fails?
If your Vaillant Boiler fails to start and the ignition attempts are unsuccessful, it could be due to faults in the gas supply such as a defective gas meter or gas pressure detector, air in the gas, gas flow pressure being too low, or the fire protection tap has disengaged. It may also be due to faults in the gas fitting (main gas magnet or operator defective), wrong gas setting, a defective igniter (ignition transformer, ignition cable, ignition plug), stopped ionization current (cable, electrode), faulty earthing in the appliance, or defective electronics. Check the gas supply and fittings for faults, and replace any defective parts.
What to do if the flame goes off during operation of my Vaillant Boiler?
If the flame goes off during operation and subsequent ignition attempts fail in your Vaillant Boiler, it might be due to a temporarily stopped gas supply, a spark failure in the ignition transformer, or faulty earthing of the appliance. Check the gas supply and ignition transformer to resolve this issue.
Why is my Vaillant ecoTEC plus Boiler showing a dry fire error?
A dry fire error in your Vaillant Boiler can occur if there is too little water in the appliance, the water shortage switch is defective, the cable to the pump or water shortage switch is defective, the pump is blocked or defective, or the pump output is too low. Refill the water and check the water shortage switch and pump.
What causes water pressure sensor or cable harness hydraulics to be defective in Vaillant ecoTEC plus?
If the water pressure sensor or cable harness hydraulics are defective in your Vaillant Boiler, it could be because the line to the water pressure sensor is broken or has a short-circuit at 0 V. Repair or replace the line to the water pressure sensor.
What does it mean if the flow/return NTC temperature difference is too great in my Vaillant ecoTEC plus?
If the flow/return NTC temperature difference is too great in your Vaillant Boiler, this may indicate that the flow and/or return temperature sensor is defective.
What does it mean if my Vaillant ecoTEC plus displays flow and/or return sensor fault?
If your Vaillant Boiler displays a flow and/or return sensor fault, it indicates that the flow and/or return sensor is defective. Replace the flow and/or return sensor.
How do I fix a short circuit in the flow NTC of my Vaillant ecoTEC plus?
If your Vaillant Boiler shows a short circuit in the flow–NTC, it could be due to the NTC plug being shorted to the casing or the NTC being defective. Check the NTC plug connection and replace the NTC if it is defective.
Why does my Vaillant Boiler have a secondary light issue?
If your Vaillant Boiler has a secondary light issue, where the ionization signal reports a flame even when the gas valve is off, it could be due to defective gas solenoid valves or a defective flame detector. Check the gas solenoid valves and replace them if they are defective.
Why is my Vaillant Boiler showing 'Electronics temperature too high'?
If your Vaillant Boiler displays 'Electronics temperature too high', it means the electronics are too hot due to an external effect or the electronics are defective. Ensure proper ventilation for the electronics and replace them if they are defective.
General| Model | ecoTEC plus SERIES |
|---|---|
| Mounting | Wall-mounted |
| Fuel Type | Natural Gas / LPG |
| ErP Heating Efficiency Class | A |
| NOx Class | 5 |
| Category | Boiler |
| Type | Condensing |
| Efficiency | Up to 94% |
| ErP Water Heating Efficiency Class | A |
Classifies warnings by danger severity using symbols and signal words.
Specifies the product's intended purpose for heating and hot water generation.
Provides essential safety guidelines for installation, operation, and maintenance.
Covers risks like flue gas, flammables, modifications, air supply, corrosion, frost, and improper maintenance.
Detailed explanation of the operator control panel symbols and functions.
Outlines the basic principles and operator control elements for product operation.
Guidance on identifying and fixing common faults.
Instructions for routine maintenance, cleaning, and checking components.
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