Baxi
Baxi/Main/Potterton secondary heat exchanger retrofit assembly 5112388
Genuine secondary heat exchanger retrofit assembly, part number 5112388, used across the Baxi, Main and Potterton HE combi/system ranges.
At a glance
- Part type: Secondary heat exchanger (retrofit assembly)
- Also known as N4838
- Have the work carried out by a Gas Safe registered engineer
£384.00
£320.00 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
This is a secondary heat exchanger retrofit assembly, part number 5112388, used across the Baxi, Main and Potterton HE boiler ranges. It sits alongside the primary heat exchanger on combi boilers and transfers heat into the domestic hot water circuit when the diverter valve calls for hot water.
Signs this part needs replacing
- Hot tap water runs lukewarm or cold while heating still works
- Reduced hot water flow rate at taps
- Boiler kettling or unusual noise when hot water is drawn
- Visible limescale or debris restricting the exchanger
Before you order
- Confirm the part number printed on your existing heat exchanger matches 5112388
- Check your exact boiler brand, model and GC number against the fitment list above
- Isolate power and water supplies before removal
- Have the work carried out by a Gas Safe registered engineer
Compliance
| GC number | H01-075 |
|---|---|
| Alternative numbers | N4838 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI COMBI 105HE | 47-075-18 | 47-075-18 | — | — |
| BAXI COMBI INSTANT 105HE | 47-075-19 | 47-075-19 | — | — |
| BAXI COMBI INSTANT 80HE | 47-075-17 | 47-075-17 | — | — |
| BAXI SYSTEM IE 24 HE MEGAFLO LPG | 51-297-58 | 51-297-58 | — | — |
| BAXI SYSTEM IE 28 HE MEGAFLO LPG | 51-297-59 | 51-297-59 | — | — |
| POTTERTON PERFORMA 24 ECO HE | 47-393-11 | 47-393-11 | — | — |
| POTTERTON PERFORMA 24 ECO HE 2 | 47-393-25 | 47-393-25 | — | — |
| POTTERTON PERFORMA 24I HE | 47-393-12 | 47-393-12 | — | — |
| POTTERTON PERFORMA 30 HE | 47-393-13 | 47-393-13 | — | — |
| POTTERTON PERFORMA SYSTEM 12HE | 41-591-24 | 41-591-24 | — | — |
Showing 10 of 13 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.
BAXI appliance manual — COMBI 105HE (GC 47-075-18)
manualmanualBAXI appliance manual — COMBI INSTANT 105HE (GC 47-075-19), COMBI INSTANT 80HE (GC 47-075-17)
manualmanualBAXI appliance manual — SYSTEM IE 24 HE MEGAFLO LPG (GC 51-297-58), SYSTEM IE 28 HE MEGAFLO LPG (GC 51-297-59)
manualmanualPOTTERTON appliance manual — PERFORMA 24 ECO HE (GC 47-393-11)
manualmanualPOTTERTON appliance manual — PERFORMA 24 ECO HE 2 (GC 47-393-25)
manualmanualPOTTERTON appliance manual — PERFORMA 24I HE (GC 47-393-12)
manualmanualPOTTERTON appliance manual — PERFORMA 30 HE (GC 47-393-13)
manualmanualPOTTERTON appliance manual — PERFORMA SYSTEM 12HE (GC 41-591-24), PERFORMA SYSTEM 18HE (GC 41-591-25), PERFORMA SYSTEM 24HE (GC 41-591-26), PERFORMA SYSTEM 28HE (GC 41-591-27)
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