hi all, got a problem with my ravenheat rsf 82e. I turned on my shower this morning and after a minute where it usually gets hot, it did not. I went to the boiler and left the shower running and the boiler was not firing up. I then tried the bath taps and the hot water tap got hot including the basin taps so why not the shower? The shower is plumbed straight straight into wall and connected to hot and cold water feeds. Is it the sensor for dhw that is malfunctioning? If so why does the boiler turn on for dhw to bathroom taps and not the shower. Just to add the shower is not electric. Bw