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Biasi Air Pressure Switch BI1376104

Biasi

Biasi Air Pressure Switch BI1376104

Air pressure switch rated at 1.38 mbar for Biasi gas boilers, fitted from serial number N020810903 onwards.

At a glance

  • Also known as 1650405, N8993-H
Manufacturer part no.
BI1376104
GC number
H27-582
Showing prices

£61.06

£50.88 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 Biasi BI1376104 is an air pressure switch rated at 1.38 mbar, used on Biasi gas boilers. It senses the pressure produced by the combustion fan and proves airflow before the boiler is permitted to fire. The switch is fitted from serial number N020810903 onwards and supersedes the earlier code BI1406102.

Signs this part needs replacing

  • The boiler fails to fire and locks out while the fan runs normally.
  • Intermittent lockouts on start-up, or after the boiler has been idle.
  • The fan runs but the boiler makes no attempt to ignite.
  • Lockouts clear on reset but return within a short period.
  • A fault code is displayed for air pressure or fan proving.

Before you order

  • Confirm your boiler model and serial number, as this switch is fitted from serial number N020810903 onwards.
  • Check the pressure rating marked on the existing switch matches 1.38 mbar.
  • Compare the part number on the existing switch against BI1376104 or the superseded code BI1406102.
  • Check the boiler's GC number against the models listed above before ordering.

Not sure which part?

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