Ferroli
Ferroli Heat Exchanger 39840850
Main heat exchanger for Ferroli Fertech 18 OV and Optimax HE PLUS 18 OV gas boilers, part number 39840850.
At a glance
- Also known as 1211887
Showing prices
£625.56
£521.30 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Ferroli 39840850 is a main heat exchanger for Ferroli gas boilers. It is fitted to Ferroli Fertech 18 OV and Optimax HE PLUS 18 OV appliances, where it forms part of the boiler's heat transfer circuit.
Signs this part needs replacing
- Visible water, scale or corrosion around the heat exchanger body
- Boiler overheating or kettling noises during operation
- Reduced heating or hot water performance
- Repeated pressure loss requiring the system to be topped up
- Leaks from the heat exchanger or its connections
Before you order
- Confirm the boiler model and GC number match the fitment list.
- Check the existing part number 39840850 against the appliance's parts list.
- Isolate and depressurise the boiler before removal.
- Check whether any seals, gaskets or connection parts are required separately.
Compliance
| Alternative numbers | FER39840850, 1211887 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| FERROLI FERROLI FERTECH 18 OV | — | — | — | |
| FERROLI FERROLI OPTIMAX HE PLUS 18 OV V2 | — | — | — | |
| FERROLI OPTIMAX HE PLUS 18 OV - 30K0673001 (04/03/2009) | 47-267-34 | 47-267-34 | — | — |
| FERROLI OPTIMAX HE PLUS 18 OV - 30K0673004 (01/11/2010) | 41-267-29 | 41-267-29 | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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 technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.