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Johnson & Starley Plate Heat Exchanger 1000-0301645

Johnson & Starley

Johnson & Starley Plate Heat Exchanger 1000-0301645

Plate heat exchanger rated 37kW for Johnson & Starley RENO 37C and Renoxtra 30C/37C boilers.

At a glance

  • Also known as 1691964
Manufacturer part no.
1000-0301645
Showing prices

£179.39

£149.49 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 1000-0301645 is a plate heat exchanger manufactured by Johnson & Starley for use in its RENO and Renoxtra boiler range. It transfers heat between the primary circuit and the domestic hot water circuit, with a rating of 37kW. It is a serviceable component within the appliance's hot water assembly.

Signs this part needs replacing

  • Domestic hot water temperature fluctuating or failing to reach the set point
  • Reduced hot water flow rate through the plate, indicating internal scaling or blockage
  • Kettling or knocking noises from the hot water circuit
  • Water weeping from the plate gaskets or between the plates
  • Cross-contamination between primary and domestic circuits, seen as discoloured water or pressure loss

Before you order

  • Confirm the appliance model and, where available, the GC number against the fitment list above
  • Check the rating of the existing plate heat exchanger matches 37kW
  • Inspect the failed unit for scale or debris that may also affect the wider hot water circuit
  • Verify the part number 1000-0301645 on the existing component before ordering

Not sure which part?

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