A brief video on How I made the connections and fitted a Honeywell Lyric T6 Thermostat with a Combi Boiler Vaillant Pro 25. Using Bootlace Ferrules crimps and Basic tools. Gassafe reg engineers only to do this as the Cover has to come off the boiler, Unless you do it from underneath Ofcourse.
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Honeywell T6 Lyric Thermostat Install
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