E19
ACV
Flow/Return Temperature Sensor Mismatch
Boiler displays E19, burner output reduced, may log as sensor discrepancy
Advertisements
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.
Advertisements
Possible Causes
Faulty return NTC sensor, Poor circulation, Incorrect sensor placement, Control board fault
How to Fix / Troubleshooting
Safety first: Isolate power before accessing sensors.
- Bleed system: Remove air from radiators and high points to improve circulation.
- Check valves: Ensure all isolation valves on the flow and return near the ACV boiler are open.
- Visual sensor check: Confirm both flow and return NTCs are firmly attached to their pipes and wired correctly.
- Professional diagnosis: A technician can compare sensor readings via the boiler diagnostics and replace the faulty NTC or address circulation issues.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Return NTC Temperature Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements