Hamworthy Main PCB Control Box 533901517

Siemens LMU64 main PCB control box configured for the Hamworthy Purwell Variheat PV65HE natural gas floor standing boiler.

At a glance

Also known as 2064338

Manufacturer part no.

533901517

Showing prices

£426.97

£355.81 ex. VAT · VAT at 20%

Available to order · 5-7 working days

Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

Siemens LMU64 main PCB control box manufactured for Hamworthy. It is configured for the Purwell Variheat PV65HE natural gas floor standing boiler and controls ignition, sequencing and safety functions. This PCB is model-specific, so the exact boiler model must be identified before ordering.

Signs this part needs replacing

Boiler fails to fire or does not respond to a call for heat
Repeated lockouts or error codes on the boiler display
No display, no power to the control panel, or unresponsive controls
Fan, pump or ignition sequence not starting
Intermittent operation or unexpected shutdowns

Before you order

Confirm the exact boiler model is the Purwell Variheat PV65HE
Confirm the boiler is the natural gas (NG) version
Check the existing PCB markings match Siemens LMU64 and part number 533901517
PCB is model-specific; a different configuration will not be suitable

Make	Model / assembly	Reference	Years	Fitment
HAMWORTHY HAMWORTHY SPARE PARTS	—		—	—
HAMWORTHY PURWELL VARIHEAT PV65HE FLOOR STANDING	—		—	—

Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.

Not sure which part?

Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.