I have an issue with my heating and wondered if anyone could help/know of anything to try before i call someone out. 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. The CMT707 Programmable room thermostat is a very easy to use and allows control of the time and temperature within your building.The CM707 has a large,clear LCD dispaly and is compatible with most combi boilers and heating systems* Two wire volt free connections are ideal for use with Combi boilers. Honeywell CM707 Programmable Thermostat (7 Day) Features: The unit will display the first parameter of installer parameter group category 1 (from n.1 to n.19). 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.

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. 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. When enabled the Pump Exercise will switch the relay on for 1 minute at 12:00 if the relay has not been switched on since 12:00 the previous day.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. 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. Up to 4 daily independent time and temperature level changes let you set 4 time and temperatures pairs to suit your lifestyle.

Can be adjusted up to 3 oC (default is 1.5 oC) to provide better temperature control (less overshoot). Installer Set-Up Mode allows extra functions to be set at the discretion of the installer to match the consumers applications and needs: 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. b. To change Minimum ON Time, please go to parameter n. 1, category 2 in the installer set-up mode.

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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 Honeywell CM707 Programable Room Thermostat is Part of the Honeywell controls range at PlumbArena. It is worth noting that the thermostat upstairs works as normal and will heat the radiators upstairs when it should do. Temporary programmed temperature override to temporarily override the programmed temperature till the next switch point.