19
Vokera
Sensor Short-Circuit / Electrical Fault
Vokera water heater displays code 19, appliance indicates sensor short-circuit or wiring fault
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Shorted NTC sensor, Pinched sensor cable, Moisture in connector, PCB input fault
How to Fix / Troubleshooting
Safety first: Isolate mains power before inspecting wiring. Risk of electric shock.
Owner checks:
- Look for obvious water leaks onto the wiring or PCB and report this to the engineer.
Engineer checks:
- Identify which sensor channel is reporting the short (flow, return, DHW, flue).
- Disconnect the sensor and measure its resistance; replace if shorted.
- Inspect the cable harness for pinched or damaged insulation causing a short to earth or between conductors.
- If wiring and sensor are sound, suspect a PCB fault and replace as needed.
Because this involves live circuits, only trained personnel should perform these tests.
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Repair Difficulty
Hard
4/5
Required Part
Sensor Wiring Harness
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