Furnace shows E14, often associated with sensor or PCB communication issues.

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.

Possible Causes

Loose harness between sensors and PCB, Damaged PCB tracks, Moisture on connectors, Faulty expansion board (if fitted)

Safety: Isolate power before accessing the control compartment. Avoid static discharge to electronic boards.

User action: Limited to a full power reset. If E14 persists, a technician is required.

Technician checks:

Inspect all low-voltage harnesses for secure connections and signs of overheating.
Check for moisture or corrosion on multi-pin connectors and dry/clean as necessary.
Verify continuity on suspect harnesses and replace if damaged.
If wiring is sound, replace the main PCB or expansion module as per Ravenheat diagnostics.

Hard 4/5

Control Wiring Harness

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