Baxi back boiler.central heating okay...have replaced clock programmer.have replaced thermostat on water tank.checked pump okay via central heating.checked burner okay via central heating.switch hot water on at programmer,red light comes on as normal.that is as far as it gets.have had no previous problems with it in the past...Could it be the electronic valve near the tank or could it be something electronic inside the fire perhaps...Thankyou in advance for any help.....all ancillaries are honeywell..
