Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
EOGB MMI810.1 Mod 35 Control Box S01-MMI810.1-35

EOGB

EOGB MMI810.1 Mod 35 Control Box S01-MMI810.1-35

EOGB MMI810.1 mod 35 burner control box, supplied as a replacement for the TFI852B unit.

Manufacturer part no.
S01-MMI810.1-35
Showing prices

£660.70

£550.58 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 EOGB MMI810.1 mod 35 is a burner control box used on EOGB, Honeywell and Satronic boiler applications. It is supplied as the replacement for the TFI852B control unit. The control box manages the burner sequence, providing the ignition, flame supervision and lockout functions required for safe boiler operation.

Signs this part needs replacing

  • The burner fails to run through its start sequence and locks out
  • The boiler repeatedly attempts ignition and then shuts down
  • The control box shows a permanent lockout that cannot be reset
  • Ignition sparks are present but the burner does not fire or prove flame
  • Intermittent burner operation with unexplained shutdowns during a demand for heat

Before you order

  • Confirm the existing control box carries the TFI852B reference before ordering the MMI810.1 mod 35
  • Check the appliance manufacturer and model against the fitment line above
  • Verify the burner control box is accessible and the appliance can be safely isolated before work begins
  • Confirm the electrical supply and wiring connections match the existing installation

Not sure which part?

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