B
bluemoonstan
fitted a 837 plus and customer wanted to use his old programmer. one of those British Gas UT1. he never used the room stat. anyway left with 3 core cable at the boiler. connected live to common, S/L to RT connection on PCB and removed the 24v link. but cant get it to fire heating. got 240v at the programmer, but not at RT when call for heat. Probably something simple i missed. one of those days. Any suggestions guys??