Applicable Systems
ecoTEC
Symptoms
A valve is not operating correctly, causing improper flow control or system imbalance.
Possible Causes
- Valve actuator failed or stuck
- Valve seat contaminated or damaged
- Control signal to valve incorrect or absent
Troubleshooting Steps
- Step 1: Check valve actuator operation and power supply
Actuator moves freely with correct voltage - Step 2: Inspect valve seat and internal components for contamination
Valve seat clean and undamaged - Step 3: Verify control signal from the controller to the valve
Control signal present and correct
How to Reset
To reset: Reset the valve fault after repairing or replacing the faulty component.
Source: Vaillant ecoTEC Boiler Manual, Vaillant GmbH
Category: Home Boiler