F.14
Lochinvar Configuration / Parameter Error

Boiler shows F.14 and will not fire, may occur after control replacement

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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 DIP switch settings, wrong boiler model selected in control, improper gas type configuration, corrupted setup

How to Fix / Troubleshooting

Safety first: Disconnect power before adjusting control settings.

  • Check DIP switches and jumpers: Refer to the Lochinvar installation manual for your model. Verify all DIP switches and jumpers on the control board match the boiler size, venting, and gas type.
  • Review installer setup: Enter the installer menu (password-protected on many models). Confirm that boiler model, input size, and system type are correctly programmed.
  • Factory reset (if allowed): Some Lochinvar controls allow a factory default reset. Follow the manual carefully if you attempt this, and record existing settings first.

Professional help: Misconfiguration can lead to unsafe operation. If you are unsure about any parameter, contact a Lochinvar-trained technician to verify and commission the boiler.

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Repair Difficulty

Hard 4/5

Required Part

Control Board Configuration
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