Hi, we have a baxi back boiler, not sure of model but it was installed in 1992, heating working well but lately it's refusing to warm the water beyond taking the chill off occasionally unless the heating is on too, then it's great. Does anyone have any ideas on cause and likely cost of repair? Don't want to be spending out too much as we're hoping to get a combi in sooner rather than later as we have a log burner for our heating.
Thanks
Thanks