The Secure C1727 is a 2-channel smart programmer that can control heat pumps, combi, and system boilers. Out of the box, it is Bluetooth and app enabled and has the option of a plug in Wi-Fi adapter to give complete smart control. The C1727 is designed to supersede the Horstmann CentaurPlus and Serv...

Highlights

Direct replacement for CentaurPlus, ServicePlus and Thermoplus ranges
Standard 6‑pin backplate for easy retrofit
Controls heating and hot water for up to two zones
Programmable via Secure Controls Bluetooth installer app or wireless display (no Wi‑Fi needed)
Optional Wi‑Fi adaptor sold separately for smart control
Seven‑year no‑quibble warranty

Key specifications

Channels: 2
Backplate type: 6‑pin
Compatible systems: Combi or system boilers and heat pumps up to 2 zones
Control methods: Bluetooth installer app, wireless display (no Wi‑Fi), optional Wi‑Fi adaptor (sold separately)
Replaces: CentaurPlus, ServicePlus, Thermoplus ranges
Warranty: 7 year
Efficiency features: Load compensation and optimum stop/start

Pros

Straightforward retrofit using existing 6‑pin backplate
Controls both heating and hot water for up to two zones
Can be programmed without Wi‑Fi via Bluetooth app or wireless display
Seven‑year warranty provides long‑term protection

Cons

Wi‑Fi adaptor for smart control is sold separately
Requires minor wiring changes when replacing older units
Limited to two heating zones

Frequently asked questions

Which existing thermostats does the C1727 replace?

It is a direct replacement for the CentaurPlus, ServicePlus and Thermoplus ranges, using the same wall plate with only minor wiring changes.

How many heating zones can it manage?

It works with combi or system boilers and heat pumps that serve up to two zones.

What programming options are available?

You can programme it with the Secure Controls Bluetooth installer app or the wireless display; a Wi‑Fi adaptor is available separately for smart control.