To change any setting, press the button, then press the or buttons until the correct value is flashing I used to work on computers and a common thing was over heating, especially laptops, they just clog up with dust, is it the same with these? Can I take it apart and clean it? I'm guessing there is some kind of temperature probe or something, does that need a wipe over?

On a recent cold night I decided to set the overnight temperature from the standard 5deg C to 15 so the boiler would operate in the middle of the night if it went cold. It had been operating set at 20 when we went to bed and shut off as expected. It was coming down in temperature. I was woken at 2-15 with the heating coming on (as expected). The problem was it ran for about 5 mins and shut down. After only 1min it fired up again and continued cycling like this. It did not run long enough to get the bedroom radiator even warm. The heating system is a bit noisy before it settles down on a normal early morning warm up and this cycling could not be tolerated to see if the cycling time extended and gave some heat out to the bathroom and landing radiators. The thermostat seemed to see it as the system had reached the required temperature. Only Bind or Re-Bind if the units become separated or one of them needs replaced. No need to re-connect after power cuts or battery replacement. I recently had my 25 year-old G rated boiler swapped out for a new Ideal Logic 35KW C Combi. It seems to be working well except I am having real problems with the temperature control. I have got a wireless "CENTER EHE0200361 RF Programmable Room Thermostat" which I have tried in several rooms in the house. Normally on reaching the setting temperature rising it seems to cycle as if the differential is too low but the heating system is not noisy so I have accepted this.Also the temperature offset of say + up to 3 degrees means that it will operate as if it is set 3 degrees higher.

Glad you are making progress, you seem like my wife who feels the cold and psychologically needs to feel a radiator on, even if the thermometer is reading a high. Nevertheless it is how you feel then that’s what matters.

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The display will show SS and a number from 0 to 5 indicating signal strength. This number will reset to zero every few seconds as a new signal measurement is made I think the Ideal Logic 35KW C Combi is OpenTherm enabled although not sure, so the CENTER EHE0200361 RF Programmable Room Thermostat is not opentherm so possibly the wrong type of thermostat for the boiler. is an RF thermostat. The Room Unit communicates with the relay Box on an 868MHz Radio Frequency (RF) to control a single heating system component such as a boiler, pump or zone valve. Neither product will communicate with other RF products that use different frequencies or communication protocols. The Relay Box is a RF device. For the best performance install in an open space. Leave at least 30cm distance from any metal objects including wall boxes and boiler housing. Press and hold the button until the screen displays tEst. If the green light on the Relay Box does not flash periodically, the units are not Bound together. See Binding or Re-Binding Procedure to re-establish wireless communication