Best Central Heating Programmer And Thermostat of 2026

Last updated on 20/02/2026

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Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package

Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package

Honeywell

Why we love it

Effortless time adjustment.
Sleek, large display.
Smart LoT integration.

Main Highlights

Now with LoT Technology
Our Largest ever Backlight Display
Factory set Clock
Automatic Summer/Winter time change
7 Day or 5/2 Day operation
Product may comes in white box or plastic package

9.7

Exceptional

9.7

Exceptional

Honeywell

Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package

Why we love it

Effortless time adjustment.
Sleek, large display.
Smart LoT integration.

Main Highlights

Now with LoT Technology
Our Largest ever Backlight Display
Factory set Clock
Automatic Summer/Winter time change
7 Day or 5/2 Day operation
Product may comes in white box or plastic package

Value for Money

HONEYWELL ST9400C 7 DAY HEATING PROGRAMMER

HONEYWELL ST9400C 7 DAY HEATING PROGRAMMER

Honeywell

Why we love it

Optimizes energy with independent programming.
Offers high flexibility daily.
Includes innovative 'Holiday' feature.

Main Highlights

ST9400C is a 2 channel programmer, designed for control of both heating and stored hot water in complete systems. The heating and hot water programmes are completely independent, to allow the system to be operated in the most energy efficient manner possible.
This unit is a 7 day full programmer that gives great flexibility offering up to three on/off switchings per day, additionally each day can be programmed differently.
The ST9400C central heating and hot water programmer has the new and ground Line of Text (LoT) display that gives clear plain English instructions whenever any button or slider is used.
The ST9400C controller also features a 'Holiday' button allowing the user to switch off their heating for a specified number of days (1 to 99) while they are away from home. Automatic summer and winter time change and up to 3 events per day
The timer also has temporary or permanent override facilities.

HONEYWELL ST9400C 7 DAY HEATING PROGRAMMER

Why we love it

Optimizes energy with independent programming.
Offers high flexibility daily.
Includes innovative 'Holiday' feature.

Main Highlights

ST9400C is a 2 channel programmer, designed for control of both heating and stored hot water in complete systems. The heating and hot water programmes are completely independent, to allow the system to be operated in the most energy efficient manner possible.
This unit is a 7 day full programmer that gives great flexibility offering up to three on/off switchings per day, additionally each day can be programmed differently.
The ST9400C central heating and hot water programmer has the new and ground Line of Text (LoT) display that gives clear plain English instructions whenever any button or slider is used.
The ST9400C controller also features a 'Holiday' button allowing the user to switch off their heating for a specified number of days (1 to 99) while they are away from home. Automatic summer and winter time change and up to 3 events per day
The timer also has temporary or permanent override facilities.

LavaTap Pro Honeywell Wireless Programmable Thermostat CM927 CM921 CM727 Replacement 7 Day Central Heating Programmer Boiler Plus Compliant White Standard

LavaTap Pro Honeywell Wireless Programmable Thermostat CM927 CM921 CM727 Replacement 7 Day Central Heating Programmer Boiler Plus Compliant White Standard

LavaTap

8% Off

Why we love it

Seamless replacement for various models.
Maintains program after battery removal.
Features intelligent heating control.

Main Highlights

Made And Supported By Honeywell Resideo: Manufactured and supported providing recognised product backing and technical support
Direct Replacement Compatibility: Designed as a replacement for Honeywell CM927 CM921 CM727 CMS727 CMT727 CMS921 CMS927 and older CM721 CMS721 CMS727E1016 CMS927B1049 wireless room thermostat and receiver models
Wireless System Requirement: Suitable for wireless Honeywell heating systems using a relay box and on off control not suitable for wired thermostats or OpenTherm only installations
Pre Bound And BDR91 Compatible: Supplied pre bound with relay box and can also be bound to Honeywell BDR91 relay box with setup guidance and QR video support
7 Day Programmer Boiler Plus Compliant: 7 day programmer with four time schedules per day intelligent heating control and Boiler Plus compliance to help meet Part L regulations
Complete Kit With Memory Retention: Includes wireless thermostat relay box table stand AA batteries and instructions with built in memory retaining programme settings during battery change

LavaTap Pro Honeywell Wireless Programmable Thermostat CM927 CM921 CM727 Replacement 7 Day Central Heating Programmer Boiler Plus Compliant White Standard

8% Off

Why we love it

Seamless replacement for various models.
Maintains program after battery removal.
Features intelligent heating control.

Main Highlights

Made And Supported By Honeywell Resideo: Manufactured and supported providing recognised product backing and technical support
Direct Replacement Compatibility: Designed as a replacement for Honeywell CM927 CM921 CM727 CMS727 CMT727 CMS921 CMS927 and older CM721 CMS721 CMS727E1016 CMS927B1049 wireless room thermostat and receiver models
Wireless System Requirement: Suitable for wireless Honeywell heating systems using a relay box and on off control not suitable for wired thermostats or OpenTherm only installations
Pre Bound And BDR91 Compatible: Supplied pre bound with relay box and can also be bound to Honeywell BDR91 relay box with setup guidance and QR video support
7 Day Programmer Boiler Plus Compliant: 7 day programmer with four time schedules per day intelligent heating control and Boiler Plus compliance to help meet Part L regulations
Complete Kit With Memory Retention: Includes wireless thermostat relay box table stand AA batteries and instructions with built in memory retaining programme settings during battery change

Danfoss FP720 V2 2 Channel Programmer Direct Replacement for FP715 SI Danfoss Programmer

Danfoss FP720 V2 2 Channel Programmer Direct Replacement for FP715 SI Danfoss Programmer

LavaTap

Why we love it

No wiring required.
Multiple schedule options.
Convenient mode settings.

Main Highlights

Danfoss FP720 V2 2 channel programmer - Direct replacement for Danfoss FP715 SI with no wiring required
7 Day, 5/2 Day & 24Hr schedules
1, 2 or 3 heating periods (2, 4 or 6 events)
Auto, Boost, On or Off, Holiday Modes
Danfoss Part No 087N7885

Danfoss FP720 V2 2 Channel Programmer Direct Replacement for FP715 SI Danfoss Programmer

Why we love it

No wiring required.
Multiple schedule options.
Convenient mode settings.

Main Highlights

Danfoss FP720 V2 2 channel programmer - Direct replacement for Danfoss FP715 SI with no wiring required
7 Day, 5/2 Day & 24Hr schedules
1, 2 or 3 heating periods (2, 4 or 6 events)
Auto, Boost, On or Off, Holiday Modes
Danfoss Part No 087N7885

Adept-Honeywell Wireless Programmable Thermostat Replacement for CM927 CM921 CM727 CM721 CMS927B1049 with Relay Box Central Heating Programmer - White

Adept-Honeywell Wireless Programmable Thermostat Replacement for CM927 CM921 CM727 CM721 CMS927B1049 with Relay Box Central Heating Programmer - White

Adept Technology

Why we love it

Offers seamless thermostat transition.
Enhanced user-friendly interface.
Promotes energy and cost savings.

Main Highlights

The Adept Wireless Programmable Thermostat, a state-of-the-art replacement unit for the Honeywell CM927, CMS927, and CMS927B1049 Wireless Room Thermostats. Designed with the latest technology, this thermostat offers a seamless transition from your existing Honeywell CM Series Wireless Thermostats, ensuring consistent temperature regulation and enhanced user experience.
7-Day Programmability: Customize your heating schedule for every day of the week, ensuring optimal comfort and energy efficiency.
Compatibility: Directly replaces a range of Honeywell CM Series products, including CM921, CMS921, CMS921B1042, CM927, CMS927, CMS927B1049, CM727, CMS727, CMS727E1016, and CM721.
Advanced RF Protocol: Utilizes the 868MHz 'Ramses 2' RF protocol for reliable communication and performance.
User-Friendly Interface: While it mirrors the user display menu of Honeywell Home's T3 Series Thermostat, it offers unique features like the absence of the +1hr function and flame icon during heating demand.

Adept-Honeywell Wireless Programmable Thermostat Replacement for CM927 CM921 CM727 CM721 CMS927B1049 with Relay Box Central Heating Programmer - White

Why we love it

Offers seamless thermostat transition.
Enhanced user-friendly interface.
Promotes energy and cost savings.

Main Highlights

The Adept Wireless Programmable Thermostat, a state-of-the-art replacement unit for the Honeywell CM927, CMS927, and CMS927B1049 Wireless Room Thermostats. Designed with the latest technology, this thermostat offers a seamless transition from your existing Honeywell CM Series Wireless Thermostats, ensuring consistent temperature regulation and enhanced user experience.
7-Day Programmability: Customize your heating schedule for every day of the week, ensuring optimal comfort and energy efficiency.
Compatibility: Directly replaces a range of Honeywell CM Series products, including CM921, CMS921, CMS921B1042, CM927, CMS927, CMS927B1049, CM727, CMS727, CMS727E1016, and CM721.
Advanced RF Protocol: Utilizes the 868MHz 'Ramses 2' RF protocol for reliable communication and performance.
User-Friendly Interface: While it mirrors the user display menu of Honeywell Home's T3 Series Thermostat, it offers unique features like the absence of the +1hr function and flame icon during heating demand.

Danfoss Randall FP715SI Heating Programmer

Danfoss

Why we love it

Customizable schedule options available.
Backlit display for readability.
Hot water and heating independence.

Main Highlights

Two channel full programmer
7 day, 5/2 day or 24 hour
2 on/offs or 3 on/offs per day
Permanent back lit display
Independent Hot Water and Central Heating

Danfoss Randall FP715SI Heating Programmer

Why we love it

Customizable schedule options available.
Backlit display for readability.
Hot water and heating independence.

Main Highlights

Two channel full programmer
7 day, 5/2 day or 24 hour
2 on/offs or 3 on/offs per day
Permanent back lit display
Independent Hot Water and Central Heating

LavaTap – Heatmiser NeoStat V2 Smart Thermostat – Wet Central Heating, Wet Underfloor Heating & Hot Water Timer (Not Electric UFH) – Programmable Heating Control, App Requires NeoHub (Platinum SIlver)

LavaTap – Heatmiser NeoStat V2 Smart Thermostat – Wet Central Heating, Wet Underfloor Heating & Hot Water Timer (Not Electric UFH) – Programmable Heating Control, App Requires NeoHub (Platinum SIlver)

LavaTap

Why we love it

Precise temperature control enhances comfort.
Smart scheduling cuts energy bills.
Quick installation suits modern design.

Main Highlights

Precise temperature control: The Heatmiser Neo Stat V2 ensures accurate heating regulation for consistent comfort and reduced energy waste across your home
Smart scheduling: Built-in 7 day, 5/2 day, and 24 hour programming lets you match heating to your lifestyle, improving efficiency and cutting bills
NeoHub required for smart features: Without a NeoHub this unit works only as a local programmable thermostat/timer. Smart app control, remote access, and multi-zone management require pairing with a Heatmiser NeoHub (sold separately)
Voice and smart home integration: Compatible with voice assistants, IFTTT, and geolocation for hands-free control and smart heating automation
Quick installation & modern design: Slim wall-mounted unit with a sleek glass fascia, designed for fast installation and a clean modern look
Energy saving performance: Intelligent management helps lower heating costs while supporting central heating, wet underfloor heating, and hot water systems (not electric UFH)

LavaTap – Heatmiser NeoStat V2 Smart Thermostat – Wet Central Heating, Wet Underfloor Heating & Hot Water Timer (Not Electric UFH) – Programmable Heating Control, App Requires NeoHub (Platinum SIlver)

Why we love it

Precise temperature control enhances comfort.
Smart scheduling cuts energy bills.
Quick installation suits modern design.

Main Highlights

Precise temperature control: The Heatmiser Neo Stat V2 ensures accurate heating regulation for consistent comfort and reduced energy waste across your home
Smart scheduling: Built-in 7 day, 5/2 day, and 24 hour programming lets you match heating to your lifestyle, improving efficiency and cutting bills
NeoHub required for smart features: Without a NeoHub this unit works only as a local programmable thermostat/timer. Smart app control, remote access, and multi-zone management require pairing with a Heatmiser NeoHub (sold separately)
Voice and smart home integration: Compatible with voice assistants, IFTTT, and geolocation for hands-free control and smart heating automation
Quick installation & modern design: Slim wall-mounted unit with a sleek glass fascia, designed for fast installation and a clean modern look
Energy saving performance: Intelligent management helps lower heating costs while supporting central heating, wet underfloor heating, and hot water systems (not electric UFH)

Plumbhub-Wireless Programmable Thermostat Replacement for CM927 CM921 CM727 CM721 CMS927B1049 with Relay Box Central Heating Programmer - White

Plumbhub-Wireless Programmable Thermostat Replacement for CM927 CM921 CM727 CM721 CMS927B1049 with Relay Box Central Heating Programmer - White

Plumbhub Plumbing and Heating Supplies

Why we love it

Programmable for energy savings.
Easy and intuitive controls.
Accurate whole-home temperature.

Main Highlights

Programmable Thermostat: This digital thermostat allows you to set your desired temperature and schedule for optimal comfort and energy savings.
Easy Operation: The intuitive controls and clear display make it simple to adjust the temperature or program settings.
Wireless Remote Sensor: The included wireless sensor detects the temperature in another room for more accurate whole-home heating or cooling.
Replacement unit for the older versions of CM721 CMS721 CM727 CMS727 CMS727E1016 CM927 CM921 CMS927 CMS927B1049 Wireless Room Thermostat & Receiver
Energy Efficient: By programming the thermostat to your schedule, you can reduce energy consumption and lower utility bills.

Plumbhub Plumbing and Heating Supplies

Plumbhub-Wireless Programmable Thermostat Replacement for CM927 CM921 CM727 CM721 CMS927B1049 with Relay Box Central Heating Programmer - White

Why we love it

Programmable for energy savings.
Easy and intuitive controls.
Accurate whole-home temperature.

Main Highlights

Programmable Thermostat: This digital thermostat allows you to set your desired temperature and schedule for optimal comfort and energy savings.
Easy Operation: The intuitive controls and clear display make it simple to adjust the temperature or program settings.
Wireless Remote Sensor: The included wireless sensor detects the temperature in another room for more accurate whole-home heating or cooling.
Replacement unit for the older versions of CM721 CMS721 CM727 CMS727 CMS727E1016 CM927 CM921 CMS927 CMS927B1049 Wireless Room Thermostat & Receiver
Energy Efficient: By programming the thermostat to your schedule, you can reduce energy consumption and lower utility bills.

Heatmiser NeoStat V2 Smart Thermostat – Sapphire Black – For Wet Central Heating, Wet UFH & Hot Water Timer (Not Electric UFH) – Programmable Heating Control, NeoHub Required For App

Heatmiser NeoStat V2 Smart Thermostat – Sapphire Black – For Wet Central Heating, Wet UFH & Hot Water Timer (Not Electric UFH) – Programmable Heating Control, NeoHub Required For App

LavaTap

Why we love it

Precise heating for ultimate comfort.
Saves energy and reduces bills.
Smart features enhance user experience.

Main Highlights

Precise temperature control: The Heatmiser Neo Stat V2 ensures accurate heating regulation for consistent comfort and reduced energy waste across your home
Smart scheduling: Built-in 7 day, 5/2 day, and 24 hour programming lets you match heating to your lifestyle, improving efficiency and cutting bills
NeoHub required for smart features: Without a NeoHub this unit works only as a local programmable thermostat/timer. Smart app control, remote access, and multi-zone management require pairing with a Heatmiser NeoHub (sold separately)
Voice and smart home integration: Compatible with voice assistants, IFTTT, and geolocation for hands-free control and smart heating automation
Quick installation & modern design: Slim wall-mounted unit with a sleek glass fascia, designed for fast installation and a clean modern look
Energy saving performance: Intelligent management helps lower heating costs while supporting central heating, wet underfloor heating, and hot water systems (not electric UFH)

Heatmiser NeoStat V2 Smart Thermostat – Sapphire Black – For Wet Central Heating, Wet UFH & Hot Water Timer (Not Electric UFH) – Programmable Heating Control, NeoHub Required For App

Why we love it

Precise heating for ultimate comfort.
Saves energy and reduces bills.
Smart features enhance user experience.

Main Highlights

Precise temperature control: The Heatmiser Neo Stat V2 ensures accurate heating regulation for consistent comfort and reduced energy waste across your home
Smart scheduling: Built-in 7 day, 5/2 day, and 24 hour programming lets you match heating to your lifestyle, improving efficiency and cutting bills
NeoHub required for smart features: Without a NeoHub this unit works only as a local programmable thermostat/timer. Smart app control, remote access, and multi-zone management require pairing with a Heatmiser NeoHub (sold separately)
Voice and smart home integration: Compatible with voice assistants, IFTTT, and geolocation for hands-free control and smart heating automation
Quick installation & modern design: Slim wall-mounted unit with a sleek glass fascia, designed for fast installation and a clean modern look
Energy saving performance: Intelligent management helps lower heating costs while supporting central heating, wet underfloor heating, and hot water systems (not electric UFH)

7-Day 2 Channel Central Heating & Hot Water Programmer Timer Replacement for Honeywell ST9400C – Dual Channel Wired Boiler Controller and Heating Timer

7-Day 2 Channel Central Heating & Hot Water Programmer Timer Replacement for Honeywell ST9400C – Dual Channel Wired Boiler Controller and Heating Timer

Hulthor

4% Off

Why we love it

Compatible with various Honeywell systems.
Flexible dual channel scheduling options.
User-friendly display and controls.

Main Highlights

Compatible With Multiple Honeywell Programmers - Works with systems using Honeywell ST9400C, ST699, ST799 and ST7100 wiring layouts, making it a suitable alternative boiler programmer for central heating and hot water control.
Independent Heating and Hot Water Scheduling - Dual channel design allows separate on/off times for heating and hot water, providing flexibility for different household usage patterns compared to single-channel timers.
7-Day Programmable Heating Timer - Supports fully programmable daily or weekly schedules with up to three on/off periods per day, allowing precise control of boiler operation and reducing unnecessary energy use.
Clear Display and Simple User Interface - Large, easy-read LCD and intuitive control buttons make adjusting heating schedules, reviewing settings, and making quick changes straightforward for homeowners or installers.
Wired Central Heating and Boiler System Compatibility - Suitable for most wired boilers and central heating systems requiring a programmable timer or heating controller, including combi, system and heat-only boiler setups.

7-Day 2 Channel Central Heating & Hot Water Programmer Timer Replacement for Honeywell ST9400C – Dual Channel Wired Boiler Controller and Heating Timer

4% Off

Why we love it

Compatible with various Honeywell systems.
Flexible dual channel scheduling options.
User-friendly display and controls.

Main Highlights

Compatible With Multiple Honeywell Programmers - Works with systems using Honeywell ST9400C, ST699, ST799 and ST7100 wiring layouts, making it a suitable alternative boiler programmer for central heating and hot water control.
Independent Heating and Hot Water Scheduling - Dual channel design allows separate on/off times for heating and hot water, providing flexibility for different household usage patterns compared to single-channel timers.
7-Day Programmable Heating Timer - Supports fully programmable daily or weekly schedules with up to three on/off periods per day, allowing precise control of boiler operation and reducing unnecessary energy use.
Clear Display and Simple User Interface - Large, easy-read LCD and intuitive control buttons make adjusting heating schedules, reviewing settings, and making quick changes straightforward for homeowners or installers.
Wired Central Heating and Boiler System Compatibility - Suitable for most wired boilers and central heating systems requiring a programmable timer or heating controller, including combi, system and heat-only boiler setups.

We scanned 812 products

We reviewed these offers relevant to the Central Heating Programmer And Thermostat within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Honeywell, LavaTap, Adept Technology, Danfoss, Plumbhub Plumbing and Heating Supplies, Hulthor, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Central Heating Programmer And Thermostat in the market, we considered we took a deep dive into 4061 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Honeywell ST9400C Programmer. 7, 2-Channel, 3 on/Off per Day, 24 V, White - Bulk Package. We love many things about this product by Honeywell. What sets it apart from the competition is Effortless time adjustment, Sleek, large display, Smart LoT integration.
The best value product for most shoppers and where user satisfaction is continuously the highest is HONEYWELL ST9400C 7 DAY HEATING PROGRAMMER by Honeywell based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Central Heating Programmer And Thermostat and the best cost-to-value ratio is LavaTap Pro Honeywell Wireless Programmable Thermostat CM927 CM921 CM727 Replacement 7 Day Central Heating Programmer Boiler Plus Compliant White Standardat LavaTap with a 8% discount.
Our list of the best Central Heating Programmer And Thermostat is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.