E19
Triangle Tube Configuration / Parameter Error

E19 displayed, unit may lock out; often related to sensor calibration or configuration.

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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

Incorrect installer settings, Corrupted control memory, Incompatible replacement control board, Misconfigured sensor type

How to Fix / Troubleshooting

Safety: Only qualified personnel should change installer-level parameters.

  • 1. Check manual: Refer to the Triangle Tube installation and service manual for the meaning of E19 on your specific model.
  • 2. Enter installer menu: Access the installer or technician menu using the documented key sequence. Verify that system type, sensor configuration, and modulation parameters match the installed equipment.
  • 3. Restore defaults: If available, use the control's function to restore factory default parameters, then re-enter required settings (system type, DHW priority, etc.).
  • 4. Firmware compatibility: If a control board was recently replaced, ensure it is the correct part number and firmware version for your Triangle Tube water heater model.
  • 5. Professional support: If E19 persists, contact Triangle Tube technical support or a qualified technician to reprogram or replace the control.
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Repair Difficulty

Hard 4/5

Required Part

Main Control Board
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