1 / 2Timeguard TRTD7 Digital Economy 7 Timeswitch with Boost
The Timeguard TRTD7 digital Economy 7 timeswitch is designed to schedule immersion-heater operation for off-peak periods, with timed boost options for extra hot water. Its preset tariff programmes and adjustable times suit households whose immersion heater and energy tariff match the intended setup.
At a glance
- Choose from 10 preset tariff programmes, then adjust the times to suit your energy plan.
- Manual boost settings run for 30, 60 or 120 minutes, with remaining time displayed. A programmed daily boost is also described.
- A rechargeable backup battery is claimed to preserve programmes for a 2 year reserve during power cuts.
- Select GMT only or automatic GMT/BST changeover to match how the energy supplier sets off-peak times.
- The listing describes compatibility with single, dual or twin element immersion heaters and recommends installation by a qualified electrician.
Reference price: £61.16
Price checked: 12 Nov 2026
View offerAhead of Black FridayExplore the selectionPros and cons
Pros
- Selectable tariff schedules and adjustable times provide a practical way to align immersion heating with off-peak periods.
- Boost choices include three timed durations as well as a programmed daily top-up.
- The display shows remaining boost time, and indicator lights distinguish off-peak heating from boost operation.
Cons
- The intended use is specific to Economy 7 immersion-heater scheduling, so it is not a general-purpose timer for other appliances.
- The stated Class I construction requires an earth connection, and the listing recommends professional installation.
Technical specifications
6 specifications| Brand | Timeguard |
|---|
| Dimensions listed | 4 x 4 x 4 cm; 719.99 g |
|---|---|
| Weight listed | 720 g |
| Rated supply/load | 13A (3kW) |
| Mounting dimensions | 111.5 x 170 x 60mm |
| Construction and protection | Class I construction, so it must be earthed. IP30 rated for restricted indoor use. |
What to know before buying
Listing details to confirm
The listed dimensions and weight conflict: one entry gives 4 x 4 x 4 cm; 719.99 g, while separate details give 720 g and the feature text gives surface-mount dimensions of 111.5 x 170 x 60mm. Confirm the physical dimensions for the intended installation. The title names TRTD7N while the model and included-components listing identify TRTD7, so check the selected listing and unit identity before purchase. Battery backup, heater compatibility and operating features are manufacturer claims.
What’s in the box
Included- Timeguard digital timeswitch with boost control, quantity 1
Who is it for?
A good fit for
- Households using an Economy 7 tariff with a compatible immersion heater.
- Buyers replacing an existing immersion-heater timeswitch who want preset tariffs and manual or scheduled boost.
- Installations where an electrician can confirm the heater, earthing and mounting arrangement are suitable.
Less suited to
- People looking for a general appliance timer or smart/app control, neither of which is stated for this model.
- Anyone needing a unit for outdoor use. The listing specifies restricted indoor use.
Customer reviews on Amazon
- 5 stars
70% 70% - 4 stars
27% 27% - 3 stars
3% 3% - 2 stars
0% 0% - 1 star
0% 0%
Customer feedback describes the programmer as easy to use and install, with positive comments about fit, replacement use and adjustable settings. Some users particularly value automatic seasonal clock adjustment and boost functionality. These are reported experiences rather than verification of compatibility: buyers should still confirm the selected TRTD7/TRTD7N identity, heater arrangement and installation requirements. The rating distribution is mostly in the higher star categories, but ratings alone do not establish performance or explain individual experiences.
Positive themes
- Customers report straightforward operation and installation.
- Feedback praises fit and use as a replacement timer.
- Customers appreciate adjustable settings, including seasonal clock adjustment and boost options.
Frequently asked questions
What is the Timeguard TRTD7 designed to control?
It is described as an Economy 7 programmer for immersion heaters, including single, dual or twin element types. Confirm compatibility with the specific heater before installation.
What boost options does it offer?
The listing specifies manual boosts of 30, 60 or 120 minutes and a programmable daily boost. Remaining time is shown on screen during a manual boost.
Does it adjust for GMT and BST?
The listing says users can choose GMT-only operation or automatic GMT/BST changeover. It also advises matching the setting to how the energy supplier defines off-peak times.
Does it need batteries?
The product details say batteries are not required and none are included. The feature description claims a built-in rechargeable battery provides a 2 year reserve for programme retention during power cuts.
Is professional installation recommended?
Yes. The listing recommends a qualified electrician and states that the unit is Class I and must be earthed.
Alternative options
Digital Programmable Switched Fused Spur Timer
£32.99
Secure E7+ 7-Day Smart Hot Water Immersion Heater Programmer Controller | Replaces Horstmann Electronic 7, Economy 7, Smart Phone Compatible with Wi-Fi HC2.4 Adaptor
£97.00
Timeguard TW1001 Smart WiFi Fused Spur Switch, Immersion Heater Timer | 2.4GHz & 5GHz Smart Switch, 13A Double Pole Timeswitch, App Control with Boost, Countdown & ON/OFF, Alexa & Google Compatible
£47.99
Horstmann CHANNELPLUS H17XL Series 2 Single Channel 7 Day Electronic Heating Programmer
£160.00
Ableholy KG316T-F 220V Intelligent Timer Time Controller16-Group Programmable Digital Switch with LCD Display and Transparent Cover
£18.68
Digital Timer Switch 220V 60A Electronic Programmable Time Controller ABS | Electronic Programmable Time Controller ABS Weekly Hourly Scheduler for Home Industrial Equipment White 90x78x68mm 1 Pack
£16.29
Digital Programmable Timer Switch 7 Day 18 On Off Programmable Digital Timer Switch Suitable for Indoor Outdoor Use, Wide Operating Temp Range, PC Casing
£18.90
Horstmann Secure 425 Tiara Two Circuit Electro-Mechanical Programmer NU5550301000 Grey
£250.00
Water Timer 3 Outlets with Brass Inlet, Programmable Sprinkler Hose Waterproof Timer, Automatic prinkler Timers with Rain Delay/Manual Watering/large LCD display for Irrigation Lawn Yard
£35.99
7-Day 2 Channel Central Heating & Hot Water Programmer Timer Replacement for Honeywell ST9400C – Dual Channel Wired Boiler Controller and Heating Timer
£64.98
Elitech Digital Temperature Controller, -40℃ to 85℃ ,Touch‑Key Thermostat with Dual Probes, Cooling & Defrost Dual Relay Output, 220VAC for Cold Storage, Freezer & Refrigerated Display Cabinets
£22.90
8-Pack Kids Digital Timer With 8 pcs Lanyard - Digital Timer Countdown Clock, Magnetic Kitchen Timers for Cooking, Minute Seconds Count Up for Children Classroom, Gym, Study
£14.99
Products with discounts that might interest you
Offer details
- Installation by a qualified electrician is recommended. The unit must be earthed and is specified for restricted indoor use.