KETOTEK Programmable Electric Underfloor Heating Thermostat (16A) with External Sensor Probe

The essentials

If you’re fitting (or already have) electric underfloor heating, a programmable thermostat is often the difference between “it works” and “it’s actually manageable”. The KETOTEK electric underfloor heating thermostat is a digital, programmable room controller with a large LCD display with backlight, plus support for an external sensor probe.

On paper, it ticks a lot of the right boxes for everyday use: weekly programming, a manual mode for those times you don’t want schedules, and options for how the temperature is sensed (internal air sensor, external probe, or using both). It’s built for a straightforward, in-wall recessed installation rather than a plug-and-play surface unit.

That said, there’s a key limitation to keep in mind: with underfloor heating, the thermostat’s sensing approach and placement matter more than people expect. If your priorities are very specific (for example, controlling floor surface temperature precisely), you’ll want to think about whether using the external probe is the best fit for how your system is laid out.

Key features that matter in daily use

This KETOTEK thermostat is designed to help you manage running costs with schedules, without making life complicated.

It supports weekly programming in multiple patterns: 5/2 days, 6/1 days, and 7 days. Each day can be set up with up to 6 periods, so you can tailor heating around mornings, evenings, and any mid-day routine. If you prefer a simpler approach, there’s also a manual mode that keeps the room at a steady temperature.

The LCD includes backlighting, which is the small thing that actually gets used—especially if you’re changing settings in dim conditions.

Another practical point is the sensor flexibility. The thermostat includes an internal air sensor, but it also comes with an external NTC temperature probe (3m cable). Depending on your setup, you can choose internal sensing, floor sensing, or both, which is useful when room air and floor temperature don’t move in lockstep.

Tech specs (worth checking before you buy)

Below are the main technical details given for this model: - Name: KETOTEK Electric Underfloor Heating Thermostats Programmable 16A - Type: Digital room thermostat for electric underfloor heating - Format: LCD touch screen (with backlight) - Capacity: 16A output - Power supply: AC 230V, 50/60Hz - Mounting: Recessed/in-wall installation - Sensor options: Built-in air sensor and external NTC probe (3m)

What stands out (and where it can feel limited)

The strongest “buying” argument here is control depth without going overboard. A weekly programme with up to 6 periods per day gives you room to be realistic about how people live—rather than forcing broad time blocks.

You also get features that are genuinely relevant in domestic settings, such as temperature calibration and child lock. There are also protection-style functions mentioned, including frost protection and high/low temperature protection, plus the ability to store data when power is off and then reset.

However, it may not suit everyone. If your priority is a very high-end smart-home style experience or app-based control, this thermostat is described as a digital touch-screen unit with built-in programming rather than a network-connected controller. So it’s more of a dependable in-room scheduling solution than a “modern home” automation upgrade.

Also, because it’s rated for 16A output, you’ll want to confirm your underfloor heating system is compatible with that switching capacity for a clean install—don’t assume.

How to get the best results

A simple example: imagine you want warmer floors from about 6:30am to 8:30am, then again from 5:00pm to 10:30pm, with a setback in between. With the up to 6 periods per day, you can map that pattern without having to reconfigure every day.

Then, pay attention to the sensor choice. If the goal is more “room comfort”, leaning on the built-in air sensor can make sense. If you’re trying to reduce overshoot or align closer to what the floor is doing, the external probe becomes more important. And if you have conditions where floor and air temperatures differ (common in some layouts), using both sensors could be the pragmatic compromise.

And keep in mind one practical nuance: no thermostat can fully remove the physics of heating delays. Underfloor systems tend to respond more slowly than radiators, so schedules that change too aggressively may feel less satisfying than smoother, staged temperature steps.

Final verdict

Worth considering if you want a programmable electric underfloor heating thermostat with weekly scheduling, a backlit LCD, and the option to use an external temperature probe to better match your setup.

It’s not the best match if you need advanced smart features beyond on-device programming, or if you specifically require a type of sensing/control approach not covered by internal sensor, external probe, or combined sensing.

If you’re comfortable confirming electrical compatibility (not just fitment) and you’re planning your heating patterns realistically, this is the sort of mid-range, practical controller that can genuinely make underfloor heating feel more predictable.

Mini FAQ

Is the KETOTEK thermostat suitable for electric underfloor heating?

It’s described as a programmable thermostat designed for electric underfloor heating systems, with recessed installation and an external sensor probe included.

Does it support weekly programming?

Yes. The thermostat supports 5/2, 6/1, and 7-day programming patterns, with up to 6 periods per day.

Can you use an external sensor probe?

Yes. It includes an external NTC temperature sensor probe with a 3m cable, and you can choose internal sensor, external sensor, or both.

What’s the output rating?

The provided output rating is 16A.

What’s included in the box?

The listing specifies the thermostat, an external temperature probe (3m), and a manual. (It also mentions screws in the description.)