Baxi
Baxi 5122457 Baxi PCB System 15
Refurbished Baxi 15 HE System PCB (5122457) — the main control board for Baxi 15 HE System and Megaflo boilers, supplied with a 12-month warranty.
At a glance
- Part type: System boiler printed circuit board (PCB)
- Appliance family: Baxi 15 HE System, Megaflo
- Also known as BAXI5122457
£157.82
£131.52 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 15 HE System PCB is the main printed circuit board that controls the operating sequence of the Baxi 15 HE System boiler family. It handles ignition timing, fan and pump control, temperature regulation and the safety interlocks that shut the appliance down when a fault is detected. This board is also listed for use on Megaflo boilers, and is supplied as a refurbished unit with a 12-month warranty.
Signs this part needs replacing
- The boiler fails to fire, or locks out repeatedly after reset
- No display, a blank display, or erratic readings on the control panel
- Heating or hot water behaves unpredictably, or the pump and fan do not start on demand
- Fault codes appear, clear on reset, then return
- The appliance trips its internal fuse or the circuit protective device when powered up
Before you order
- Confirm the number 5122457 against the label on the board currently fitted
- Check the boiler model plate and GC number to confirm the appliance is a 15 HE System or Megaflo variant
- Inspect the wiring harness, plugs and earth connections for heat damage or corrosion before fitting the replacement board
- Retain the warranty paperwork supplied with the refurbished board
Mechanical
| Part type | System boiler PCB |
|---|---|
| Appliance family | Baxi 15 HE System, Megaflo |
Compliance
| Manufacturer part number (MPN) | 5122457 |
|---|---|
| Commodity code | 8537 10 00 00 |
| GPC classification | Heating System Controls |
| Alternative numbers | 7625854086517, BAXI5122457, 254889043208, 43375396, 1118396, N4933-1 |
No fitment data held for this part.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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