Potterton
Potterton 21/18602 Puma full sequence control PCB
At a glance
- Also known as 1120857, POTTERTON21/18602
- Fitting must be carried out by a Gas Safe registered engineer
AvailabilityCall for price
Availability: no longer made. Call us and we'll check for stock.
No longer made: call us
The manufacturer has discontinued this part. Our team will check for remaining stock or a suitable replacement.
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30-day returns
Unused, in original packaging.
What it is
The 21/18602 is a Potterton full sequence control printed circuit board, fitted to the Puma and Combi ranges. It manages the boiler's ignition sequence, modulation handover and safety monitoring throughout a firing cycle.
Signs this part needs replacing
- Boiler fails to complete its ignition sequence or locks out mid-cycle
- Intermittent shutdowns with no consistent fault elsewhere
- Fan, pump or gas valve stop responding correctly during firing
- Display or fault-code pattern points to a sequence control fault
Before you order
- Confirm the part number on your existing board matches 21/18602 or its earlier number 929689
- Isolate electrical power before removing the old board
- Fitting must be carried out by a Gas Safe registered engineer
Compliance
| GC number | 289-555 |
|---|---|
| Alternative numbers | 7625869091223, POTTERTON21/18602, BAXI21/18602, BAXI21/18602, BAXI21/18602, 265075902345, 1120857 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMBI 100 | 47-393-04 | 47-393-04 | — | — |
| POTTERTON COMBI 80 | 47-393-03 | 47-393-03 | — | — |
| POTTERTON PUMA 100 E SIT / HONEYWELL CONTROLS | 47-590-13 | 47-590-13 | — | — |
| POTTERTON PUMA 80 E SIT / HONEYWELL CONTROLS | 47-590-11 | 47-590-11 | — | — |
| POTTERTON PUMA FLOWSURE PLUS | 47-590-18 | 47-590-18 | — | — |
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.
POTTERTON appliance manual — COMBI 80 (GC 47-393-03)
manualmanualPOTTERTON appliance manual — PUMA 100 E SIT / HONEYWELL CONTROLS (GC 47-590-13)
manualmanualPOTTERTON appliance manual — PUMA 80 E SIT / HONEYWELL CONTROLS (GC 47-590-11)
manualmanualPOTTERTON appliance manual — PUMA FLOWSURE PLUS (GC 47-590-18)
manualNo technical questions yet for this part.
Not sure which part?
Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.