b. To change Minimum ON Time, please go to parameter n. 1, category 2 in the installer set-up mode. I have an Ideal Combi 35 boiler and 2 Honeywell CM707 Thermostats, one upstairs, one downstairs, each controlling their own set of radiators. All around a year old. The normal upper temperature limit of 35 oC can be reduced down to 21 oC to save the homeowner energy. OFF mode has an integral frost protection setting at minimum 5°C (installer adjustable) so that pipes in the house will never freeze in winter. Press the TEMP or buttons to change the factory setting. The display will flash indicating that a change has been made.

Designed with reliability in mind, the CM707 is built to withstand daily use and ensures consistent and accurate temperature control. It is compatible with a wide range of heating systems, including combi boilers, and can be wired or used wirelessly with an RF module. All settings held are the factory defaults. Changes to 0 when one of the parameter values are changed The Honeywell CM707 is a programmable thermostat that allows users to easily control the heating and cooling of their homes. It features a sleek and modern design that blends well with any decor. The thermostat is specifically designed to provide comfort and energy efficiency, allowing users to set different temperatures for different times of the day.

One of the key features of the Honeywell CM707 is its advanced scheduling capabilities. Users can set up to six different temperature settings per day, ensuring optimal comfort and energy savings. This thermostat also has a vacation mode, which allows users to set an energy-saving temperature while they are away. The normal lower temperature limit of 5 oC can be increased up to 21 oC to protect the inhabitants from cold. Useful if the inhabitants include the elderly, children or disabled.

With its programmable functionality, the CM707 gives you the flexibility to create customized heating schedules that suit your lifestyle. By setting specific time periods and temperatures, you can ensure that your home is always at the optimal temperature when needed, helping to save on energy costs.

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I have an issue with my heating and wondered if anyone could help/know of anything to try before i call someone out. Temporary programmed temperature override to temporarily override the programmed temperature till the next switch point.

Holiday button provides energy savings by reducing the temperature from 1 to 99 days when people are on holiday, returning to normal operation (AUTO or MANUAL) on the day of their return. On the boiler it is set to the Hot Water and Radiator mode, which it has always been. I have removed the batteries from both CM707's but it still carries on heating. It is like it is ignoring the downstairs Thermostat and just constantly heating the radiators. Surface or wall box mounting options, with trunking guides and wiring breakouts to simplify installation.In terms of compatibility, the Honeywell CM707 is compatible with most heating and cooling systems, including gas, oil, and electric systems. It also supports both 24-volt and millivolt systems. The problem i have is that the radiators downstairs are constantly on regardless of whether or not the thermostat is on manual, auto, or off. This started happening out of the blue yesterday. If the thermostat is located in a hot/cold location and cannot be moved because of wiring then the measured/ displayed temperature can be adjusted by +/- 3 oC. Useful if the homeowner wants the reading to match another appliance temperature display. Can be adjusted up to 3 oC (default is 1.5 oC) to provide better temperature control (less overshoot).