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Alpha DHW Temperature Sensor 1.039477

Alpha

Alpha DHW Temperature Sensor 1.039477

Alpha NTC pipe probe (D14) for domestic hot water temperature sensing on E-TEC and Evoke boilers.

At a glance

  • Also known as 8901134
Manufacturer part no.
1.039477
Showing prices

£14.75

£12.29 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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 Alpha 1.039477 is an NTC temperature sensor supplied as a pipe-mounted probe with a D14 fitting. It is used on Alpha E-TEC and Evoke appliance families to sense domestic hot water temperature. The sensor feeds a resistance signal back to the boiler's control board so the DHW circuit can be regulated.

Signs this part needs replacing

  • Domestic hot water runs hot and cold instead of holding a steady temperature
  • No hot water demand response, or the boiler fails to fire on a DHW call
  • DHW temperature readings that are clearly wrong or erratic
  • Sensor-related fault codes or lockouts appearing on the boiler display
  • Visible damage, corrosion or a loose probe at the pipe connection

Before you order

  • Confirm your appliance model against the fitment list above
  • Check the part number on the existing sensor matches 1.039477
  • Inspect the probe and pipe connection point for damage before fitting

Not sure which part?

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