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Worcester Bosch Temperature Sensor Outdoor Unit 8738203594

Worcester Bosch

Worcester Bosch Temperature Sensor Outdoor Unit 8738203594

Temperature sensor for the outdoor unit of Worcester Bosch heat pumps, supplied as part number 8738203594.

At a glance

  • Appliance family: Worcester WAA OU 6 heat pump
  • Also known as 2248451
Manufacturer part no.
8738203594
Showing prices

£79.73

£66.44 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 TEMPERATURE SENSOR OUTDOOR UNIT is a Worcester Bosch temperature sensor used on the outdoor unit of the WAA OU 6 heat pump. It measures outdoor air temperature and feeds that signal back to the heat pump control, which uses it to regulate operation. The sensor is supplied under part number 8738203594.

Signs this part needs replacing

  • Outdoor temperature readings that are clearly wrong or implausible for the conditions
  • Heat pump efficiency drop or unexpected cycling linked to incorrect ambient temperature sensing
  • Defrost or weather compensation behaviour that does not match the actual outdoor temperature
  • Fault codes or lockouts on the heat pump control pointing to an outdoor sensor circuit
  • Visible damage, corrosion or a broken cable at the sensor or its connector

Before you order

  • Confirm the appliance is a Worcester WAA OU 6 heat pump
  • Check the part number on the existing sensor against 8738203594
  • Inspect the sensor connector and cable run for damage before replacing
  • Isolate the power supply to the outdoor unit before any work begins

Not sure which part?

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