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Hamworthy High Limit Thermostat JUMO EM80 747433982

Hamworthy

Hamworthy High Limit Thermostat JUMO EM80 747433982

High limit thermostat for Hamworthy Dorcester DRSE water heaters, JUMO EM80 type, part number 747433982.

At a glance

  • Also known as 2063806
Manufacturer part no.
747433982
Showing prices

£295.90

£246.58 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 Hamworthy high limit thermostat, part number 747433982, is a JUMO EM80 type safety thermostat used on Hamworthy Dorcester DRSE water heaters. It monitors water temperature and interrupts the burner circuit if the set limit is exceeded, protecting the appliance from overheating. It is listed in the thermostats section of the gas boiler spares range.

Signs this part needs replacing

  • The appliance locks out on overheat and needs a manual reset before it will run again.
  • Repeated overheat lockouts occur with no other obvious cause in the system.
  • No hot water or heating because the limit thermostat has tripped and will not reset.
  • The burner fails to fire after the appliance has reached its set temperature.

Before you order

  • Confirm the appliance model against the fit list above.
  • Check the part number on the existing thermostat matches 747433982.
  • Check the thermostat body is marked JUMO EM80.
  • Any work on the appliance should be carried out by a competent heating engineer.

Not sure which part?

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