I am unable to turn on my heating, either by using the timed clock or manually. The hot water still works when the tap is turned on. The pressure is good in the system and there are no red warning lights showing.
try taking the motorized switch off the boiler it maybe stuck in the out position the rod underneath it should move in and out as the switch operates.. its removed by prizing the clip up behind it. its the large black plastic round thingy with a wide block of three connections on the left hand side when the bottom cover is dropped down hope this helps.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.