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Worcester Bosch Temperature Sensor NTC 650mm 8738204631

Worcester Bosch

Worcester Bosch Temperature Sensor NTC 650mm 8738204631

NTC temperature sensor with a 650mm lead for Worcester Bosch Greensource air/water heat pumps, part 8738204631.

At a glance

  • Also known as 1022507
Manufacturer part no.
8738204631
Showing prices

£161.77

£134.81 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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 Worcester Bosch 8738204631 is an NTC temperature sensor supplied with a 650mm lead. It is used on Greensource air/water heat pumps, where it provides a temperature reading back to the appliance control board. The sensor is a cabled probe with the lead fitted as part of the assembly.

Signs this part needs replacing

  • The heat pump reports an implausible, fixed or out-of-range temperature reading
  • Frequent short cycling or unexpected lockouts during normal operation
  • Heating or hot water output that does not match the setpoint
  • Fault codes relating to a temperature sensor or its circuit
  • Readings that drift or change without a corresponding change in system temperature

Before you order

  • Confirm your appliance model matches one of the Greensource units listed above
  • Check the part number on the existing sensor against 8738204631
  • Check the lead length and connector on the existing sensor match this 650mm cabled probe

Not sure which part?

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