When switching to dhw, the boiler runs for a few seconds, switches off the flame waits then restarts again, cycling again. The green led flashes [normal] throughout. dhw temp runs at 56/58c. using the shower is the worst culprit. have changed the mixer, makes no difference.
Any suggestions?
regards
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.