Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Honeywell MT4-024-NC thermoelectric actuator, 24V

Honeywell

Honeywell MT4-024-NC thermoelectric actuator, 24V

A 24V normally-closed thermoelectric actuator for two-position control of radiator, fan coil, underfloor heating and cooling valves.

At a glance

  • Also known as 4200350
Manufacturer part no.
MT4-024-NC
Showing prices

£43.44

£36.20 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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 MT4-024-NC is a Honeywell small linear thermoelectric actuator for two-position (open/close) control of heating and cooling valves, used on radiators, fan coil units, underfloor heating, cooling ceilings and convectors.

Signs this part needs replacing

  • Valve stays open or closed regardless of the control signal
  • Actuator runs hot or makes a clicking/buzzing noise without moving the valve
  • No response from the room thermostat or controller
  • Visible damage to the casing or cable

Before you order

  • Confirm your valve has the M30 x 1.5 mounting thread
  • Check whether your system needs normally-closed (NC) or normally-open (NO) operation
  • Isolate the control circuit before removal

Not sure which part?

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