Anyone using "Call for Heat" To Parent Forum June 14, 2018 at 12:37 #25321 crivvensParticipant I have been running my system for about a month. Regularly it will not switch on for entire evening (17:30-23:30) but runs ok next morning. I’m logging all the LAN broadcasts and hoping for a clue. Lightwave Link (930) + 10x TRV (922) + Thermostat + Boiler Switch- London, UK October 2, 2018 at 10:31 #25417 crivvensParticipant Getting cold again and same issue has reappeared. Anyone using call for heat? Lightwave Link (930) + 10x TRV (922) + Thermostat + Boiler Switch- London, UK You must be logged in to reply to this topic.