Timeguard NTT03 NTT01: 24-Hour Compact Timer Switch for Immersion Heaters

Timeguard NTT03: Compact Timer Switch with 24-Hour/7-Day Settings for Immersion Heaters


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  • In stock, ready to ship
  • Inventory on the way
  • Model: NTT03 24 Hour/7 Day Compact Electronic Immersion Heater Timeswitch
  • Programmability: 4 ON/4 OFF periods per day, up to 28 ON/28 OFF programmes per week
  • Switching Time: Shortest switching time of 1 minute for precision control
  • Display: Extra large ÔEasy ViewÕ screen with blue LED backlighting for clear visibility
  • Indicators: Red LED for 'Mains ON' and green LED for 'Output'
  • Usability: Large programme buttons for easy operation
  • Override Feature: Self-cancelling override button to the next programme change
  • Boost Function: Optional 1 and 2-hour boost button for additional control
  • Time Adjustment: Automatic summer/winter time change for convenience
  • Memory: Rechargeable memory back-up ensures settings are retained
  • Installation: Suitable for standard flush or surface mount box (min 32mm)
  • Operating Voltage: 230V AC
  • Frequency: 50Hz
  • Earth Class Rating: Class II
  • Operating Temperature: 0¡C to 40¡C
  • Mounting Hole Centres: 60 mm for easy installation
  • Energy Efficiency: Standby consumption less than 0.96W
  • Dimensions: Height 92mm, Width 92mm, Depth 59mm

The NTT03 24 Hour/7 Day Compact Electronic Immersion Heater Timeswitch, a new addition to Timeguard's compact timeswitch range, offers unparalleled control and convenience for managing heating schedules. This model provides up to 4 ON and 4 OFF periods per day, which translates to 28 programmable ON/OFF cycles per week, with the shortest switching time being just 1 minute. The extra-large screen with blue LED backlighting ensures easy reading of settings, complemented by distinct red and green LED indicators. Large programme buttons simplify adjustments, and the self-cancelling override button adds to the ease of use, allowing for quick changes to the next scheduled programme. The timeswitch features an optional 1 and 2-hour boost function, perfect for temporary heating needs. It also automatically adjusts for summer and winter time changes, ensuring accuracy throughout the year. Equipped with a rechargeable memory back-up, the NTT03 retains its settings even during power interruptions. Designed to fit standard flush or surface mount boxes, and with a standby power consumption of less than 0.96W, it is an energy-efficient choice. Measuring 92mm in height and width, and 59mm in depth, this timeswitch is compact yet powerful, ideal for those requiring precise and reliable control over their immersion heating systems.

Products indicated as 'Inventory On The Way' above the 'Add to Cart' button are not subject to standard shipping policies.

  • Free local delivery for orders exceeding £79.99, within a 10-mile radius of our store, delivered within 3 to 5 days.
  • In-store collection option is available, ranging from 1 to 7 business days.
  • Additional delivery options include Next-day and Express services.
  • All orders are environmentally packaged using recycled materials.
  • For detailed information on shipping methods, costs, and delivery times, please refer to our delivery FAQs.


  • Returns require pre-authorisation. Refer to our returns page for comprehensive details.
  • For specific conditions and procedures, consult our return FAQs.


  • Next Day Shipping: Available Monday to Friday with a 1pm cut-off for in-stock items (excluding pre-order products). Cost: £10.95.
  • 3-4 Day Economy Small Parcel Service: For orders between £0.01–£19.99 (in-stock items only, excluding pre-order products). Cost: £4.95.
  • 3-5 Day Standard Shipping: For orders between £20.00–£89.98 (in-stock items only, excluding pre-order products), available Monday to Friday. Cost: £7.95.
  • Free Standard Shipping: 3-5 working days for orders £89.99 and up (in-stock items only, excluding pre-order products), available Monday to Friday.

For shipping quotes to other UK zones, please contact our sales team.

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