Have an intermitant problem just started to gas central heating. Sometimes boiler will not fire up when temperature is lower than room thermostat setting. Turning the room thermostat up and down so it clicks doesn't activate boiler. But if i turn the central heating power off then back on again at the mains the boiler sometimes comes on. Programmer is acl Lifestyle LP722, room stat is acl TS 142. Can anyone give advise?
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