What does fault code 04 mean on Immergas?

The PCB detects an internal fault or inconsistencies in the circuits it manages and locks the boiler; to verify, first check the safety thermostat and the flue pressure switch and their wiring; if everything is correct, the documentation itself indicates to replace the PCB and verify the quality of the power supply.

What does fault code 15 mean in Immergas?

Configuration error The PCB is incorrectly configured or does not recognize the type of boiler due to wiring/parameterization; check the recognition cables/jumpers (e.g., flue pressure switch). If the issue persists after checks, the factory instruction is to replace the PCB.

RefurbishedImmergas PCBs (control boards)

Immergas Eolo Maior 24 RW VID PCB Ref. 101932

Name: Immergas Eolo Maior 24 RW VID PCB Ref. 101932
Brand: Immergas
SKU: PLCIMM24RW
Price: 35 EUR
Availability: InStock

35 €VAT includedIn stock · 1 unit

PCB (control board): refurbished spare part that controls the ignition, modulation, and safety features of the boiler. Useful if the boiler does not ignite, locks out, or the display is unresponsive. Reference 101932. Includes a one-year warranty and delivery within 2–4 working days in the EU.

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Delivery in 2–4 working days

1-year warranty

14-day return

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Key Data

Reference: 101932
Brand: Immergas
Type of part: PCBs (control boards)
Available units: 1 unit in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

Code	What does it mean?	Cause and diagnosis (this part)
04	Anomalía genérica de la placa electrónica de la caldera	The PCB detects an internal fault or inconsistencies in the circuits it manages and locks the boiler; to verify, first check the safety thermostat and the flue pressure switch and its wiring; if everything is correct, the documentation itself indicates replacing the PCB and verifying the quality of the power supply.
15	Configuration error	The PCB is misconfigured or does not recognize the type of boiler due to wiring/parameterization; check the recognition cables/jumpers (e.g., flue pressure switch). If the issue persists after checks, the factory instruction is to replace the PCB.