E16
Triangle Tube
Gas Valve Control Error
Boiler shows E16, gas valve or gas train 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
Failed gas valve coil, Loose gas valve wiring, Incorrect gas valve configuration, Control board gas output fault
How to Fix / Troubleshooting
Safety: Turn off power and close the gas shutoff valve. Gas valve work must be done by a licensed gas technician.
- Step 1 – Visual inspection: Confirm the gas valve on the Triangle Tube boiler is not physically damaged and that its electrical connector is fully seated.
- Step 2 – Check gas shutoff: Ensure the manual gas cock upstream of the boiler is fully open.
- Step 3 – Reset boiler: Restore power and attempt a reset. If E16 reappears, do not continue cycling.
- Professional service only: A licensed technician must test gas valve resistance, verify supply pressure, and replace or adjust the gas valve and control board as required. Do not attempt internal gas valve repairs yourself.
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Repair Difficulty
Professional Required
5/5
Required Part
Gas Valve Assembly
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