Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Ferroli Heat Exchanger 39846940

Ferroli

Ferroli Heat Exchanger 39846940

Ferroli heat exchanger, part number 39846940, for Modena HE 32S and T-ONE 32S HE boilers.

At a glance

  • Part type: heat exchanger
  • Appliance family: Modena 32S / Modena HE 32S
  • Also known as 3510277
  • Isolate the gas, water and electrical supplies before any work, and use a Gas Safe registered engineer where gas-carrying components are involved
Manufacturer part no.
39846940
Showing prices

£766.73

£638.94 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

This is a heat exchanger manufactured by Ferroli, part number 39846940. It is used on Modena 32S and T-ONE 32S HE boiler models, where it transfers heat from the combustion circuit into the domestic heating and hot water system. It is a component-level part, not a complete appliance.

Signs this part needs replacing

  • Visible leakage or weeping from the heat exchanger body or its connections
  • Persistent pressure loss on the boiler with no external leak found elsewhere on the system
  • Overheating or repeated high-limit trips during normal operation
  • Kettling, banging or rumbling noises from the heat exchanger during firing
  • Discoloured or scaled waterways, or restricted flow through the exchanger

Before you order

  • Confirm the boiler model and, where available, the appliance serial or model reference against the fitment list above
  • Check the existing heat exchanger for the same part number 39846940 before removal
  • Confirm whether the fault is with the heat exchanger or with an associated component such as the pump, sensor or expansion vessel
  • Isolate the gas, water and electrical supplies before any work, and use a Gas Safe registered engineer where gas-carrying components are involved

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.