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Andrews Ignition Transformer E403

Andrews

Andrews Ignition Transformer E403

Ignition transformer with power lead for Andrews R18, R2000 and Supaflo R18 water heaters.

At a glance

  • Also known as 1821343
Manufacturer part no.
E403
Showing prices

£339.46

£282.88 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 Andrews E403 is an ignition transformer supplied with a power lead. It produces the high-voltage spark that lights the burner in Andrews water heaters. It is used across the R18, R2000 and Supaflo R18 appliance families.

Signs this part needs replacing

  • Burner fails to light despite a call for heat
  • No spark at the electrode during the ignition sequence
  • Repeated lockouts shortly after start-up
  • Audible clicking from the transformer but no ignition
  • Visible scorching, cracking or burning on the transformer body or lead

Before you order

  • Confirm your appliance is an R18, R2000 or Supaflo R18 model
  • Check the existing transformer's part number against E403
  • Inspect the power lead connector and electrode wiring for damage
  • Verify the fault lies with the transformer and not the ignition electrode or control board

Not sure which part?

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