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Andrews Thermal Switch 7704039

Andrews

Andrews Thermal Switch 7704039

Thermal switch for Andrews water heaters, including Classicflo RSC 9/145 and RSC 9/180 models.

At a glance

  • Appliance family: Andrews water heaters
  • Also known as 1823152
Manufacturer part no.
7704039
Showing prices

£21.22

£17.68 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 7704039 is a thermal switch used in Andrews water heaters. It monitors temperature in the appliance and interrupts the heating circuit when a preset limit is reached, helping to protect the unit from overheating. It is listed for use across the Andrews water heater range, including Classicflo RSC models.

Signs this part needs replacing

  • The appliance repeatedly locks out or shuts down during a heating cycle.
  • No hot water is produced even though the appliance appears to run.
  • The overheat reset trips again shortly after being reset.
  • An overheat or high-limit fault code is shown.
  • Intermittent operation that cannot be traced to other controls.

Before you order

  • Confirm your appliance model matches one of the fitments listed above.
  • Check the part number on the existing thermal switch where it is visible.
  • Verify the fault lies with the thermal switch rather than another safety or control component.
  • If unsure, have a qualified heating engineer confirm the correct part.

Not sure which part?

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