Baxi
Baxi 5121862 Baxi PCB Combi He 24/20
Baxi printed circuit board, part 5121862, for Combi 24 appliances. The control board that runs boiler sequencing and safety checks.
At a glance
- Part type: Printed circuit board (PCB)
- Also known as 7625854036383, BAXI5121862, 254889043197, 1118382, N8534-1
£169.82
£141.52 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Baxi 5121862 is a printed circuit board (PCB) used in Baxi Combi 24 appliances. It is the main control board, handling ignition sequencing, temperature regulation, pump and fan control, and the safety interlocks that shut the boiler down when a fault is detected. The board sits inside the appliance casing and connects to the wiring harness, sensors and gas valve circuit.
Signs this part needs replacing
- The boiler has no power or no display, with the appliance otherwise supplied correctly
- The boiler locks out repeatedly and will not reset
- The fan, pump or ignition sequence does not start when there is a demand for heat or hot water
- Fault codes appear that point to the control board rather than a sensor or switch
- The board shows visible heat damage, scorching or corrosion around the terminals
Before you order
- Check the model and GC number on the appliance data badge and match them against the compatibility information for this part
- Note the existing board's part number and revision markings before removal, as board revisions can differ between production runs
- Have the wiring harness and connector condition checked at the same time, as damaged plugs can cause faults that look like board failure
Mechanical
| Part type | Printed circuit board |
|---|
Compliance
| Manufacturer part number (MPN) | 5121862 |
|---|---|
| Commodity code | 8537 10 90 90 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 7625854036383, BAXI5121862, 254889043197, 1118382, N8534-1 |
No fitment data held for this part.
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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