Baxi
Baxi Printed Circuit Board 7866417
Baxi 7866417 printed circuit board for selected 400, 600, 800 and Assure series gas boilers.
At a glance
- Also known as 1135021
£276.22
£230.18 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 7866417 is a printed circuit board used in Baxi gas boilers. It is the main control board that manages ignition, sequencing, safety interlocks and communication with the appliance's sensors and controls. It is fitted across a number of Baxi Combi and System models in the 400, 600, 800 and Assure ranges.
Signs this part needs replacing
- Boiler has no power or the display and controls remain blank
- Repeated lockout or fault codes that clear only temporarily
- Boiler fails to fire or ignition sequence does not complete
- Pump, fan or diverter behaviour becomes erratic or unresponsive
- Intermittent faults that change or disappear when the board is disturbed
Before you order
- Confirm the appliance model and GC number against the fitment list above
- Check the existing board's part number and revision markings before ordering
- Isolate the electrical supply and photograph the wiring connections before removal
- Verify that the fault is not caused by a sensor, fuse or wiring fault upstream of the board
Compliance
| Alternative numbers | 1135021 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI 424 ERP COMBI 2.1 | 47-077-74 | 47-077-74 | — | — |
| BAXI 430 ERP COMBI 2.1 | 47-077-75 | 47-077-75 | — | — |
| BAXI 436 ERP COMBI 2.1 | 47-077-76 | 47-077-76 | — | — |
| BAXI 615 SYSTEM 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 41-884-01 | 41-884-01 | — | — |
| BAXI 615 SYSTEM 2 - INTERNAL FIT PRESSURE GAUGE | 41-884-01 | 41-884-01 | — | — |
| BAXI 618 SYSTEM 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 41-884-02 | 41-884-02 | — | — |
| BAXI 618 SYSTEM 2 - INTERNAL FIT PRESSURE GAUGE | 41-884-02 | 41-884-02 | — | — |
| BAXI 624 COMBI 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 47-077-55 | 47-077-55 | — | — |
| BAXI 624 COMBI 2 - INTERNAL FIT PRESSURE GAUGE | 47-077-55 | 47-077-55 | — | — |
| BAXI 624 SYSTEM 2 - FRONT FACING ANALOGUE PRESSURE GAUGE | 41-884-03 | 41-884-03 | — | — |
Showing 10 of 39 compatible appliances.
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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