E19
Termet
Modulation / Gas Valve Control Fault
Boiler displays E19, may continue to run at reduced performance, error appears intermittently.
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
Defective gas valve modulation coil, Faulty PWM or 0–10 V control from PCB, Loose connector on gas valve, Internal PCB modulation circuit failure
How to Fix / Troubleshooting
Safety warning: Gas valve control faults must be handled by a licensed gas technician.
User checks:
- Note whether the boiler seems to run only at minimum or maximum power.
- Reset the boiler once. If E19 persists, stop using the boiler and call a professional.
Technician checks:
- Measure control signal from the PCB to the gas valve during operation.
- Check continuity and resistance of the modulation coil on the gas valve.
- Inspect connectors for secure fit and corrosion.
- Replace the gas valve or PCB depending on test results.
After repair, perform full combustion setup according to Termet specifications.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Modulating Gas Valve
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements