Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Vaillant Thermocompact/Turbomax printed circuit board 0020034604

Vaillant

Vaillant Thermocompact/Turbomax printed circuit board 0020034604

Genuine Vaillant printed circuit board, part number 0020034604, for Thermocompact and Turbomax Plus boilers.

At a glance

  • Part type: Printed circuit board
  • Also known as 1373760
  • Have the work carried out by a Gas Safe registered engineer
Manufacturer part no.
0020034604
Showing prices

£401.26

£334.38 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 Vaillant's printed circuit board, part number 0020034604. It is the boiler's central control, monitoring the thermostats, sensors and switches, and enforcing the safety functions that shut the boiler down if a fault is detected.

Signs this part needs replacing

  • Boiler will not respond to controls or displays no activity
  • Intermittent lockouts with no clear fault pattern
  • Boiler fails to ignite despite other components testing correctly
  • Display or indicator lights behaving erratically

Before you order

  • Confirm the part number printed on your existing board matches 0020034604
  • Check your exact boiler model against the fitment list above
  • Isolate electrical power before removing the old board
  • Have the work carried out by a Gas Safe registered engineer

Not sure which part?

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