Main Boiler Combi 25 Eco PCB Replacement Part 7679746

This main combi 25 eco pcb manages ignition, pump and safety controls so the boiler runs reliably. However, power surges, moisture or component failure can cause lockouts, no heating/hot water, random resets or error codes. Therefore, replacing the correct PCB for your model and serial range restores stable operation and helps prevent repeat shutdowns. Installation should be carried out by a qualified engineer.

Compatibility :

• Eco Elite: 25 (Pre Serial MMH 1512), 25 (Post Serial MMH 1512), 30 (Pre Serial MMH 1512), 30 (Post Serial MMH 1512)
• Combi ERP: 25 (Serial ending AC), 25 (BC), 25 (CC), 25 (DC), 25 (EC)
• Combi Eco: 25 Eco, 30 Eco

Important fitting advice

We recommend that all parts are fitted by a fully qualified Gas Safe registered engineer. If you need help confirming the right part, contact us our team has 10+ years of boiler spares knowledge and friendly chat support to help you quickly.

Delivery

At Boiler Spares Hub, we dispatch orders within 1 working day (Monday-Friday). Orders placed outside working days will be dispatched on the next working day. For delivery options available for this product, please add it to your basket or check our delivery options page.

Returns

We accept 30-day returns. Returns must be in an unopened, sealed box. If we find the item has been used or installation was attempted, we may refuse the return.

Frequently Asked Questions (FAQs)

1. What does a boiler PCB do?
It controls ignition, pumps, sensors and safety shut-downs so the boiler runs correctly.

2. What are the symptoms of a faulty PCB on a Main Combi 25 Eco?
No heating/hot water, boiler not firing, random resets, lockouts, flashing lights, or recurring error codes.

3. Can a power surge damage the PCB?
Yes-surges and electrical issues are common causes of PCB failure, so stable power supply matters.

4. Will replacing the PCB fix intermittent shutdowns?
Often yes if the shutdowns are caused by control-board faults (not by sensors, pump, fan, or wiring issues).

5. Do I need a Gas Safe engineer to fit a PCB?
Recommended safe isolation, correct setup and checks are important on boiler controls.