My Potterton Kingfisher MF fires instanly on initial start up but once it has done a cycle of heating the hot water and whilst the boiler is still warm the relay clicks about 5 times and it takes several goes to fire up. I had the thermostat replaced but it made no difference.
You need an RGI to check and adjust pilot, once the appliance is warm there's a better pull on the flue, a dirty or poor pilot the gas is pulled away from the pilot - so the gas air mixture isn't correct.
Many thanks. Maybe the service man failed to understand the problem and simply fitted a new temperature control. I will ask him to recall and see how it goes.
htg engineer wrote:You need an RGI to check and adjust pilot, once the appliance is warm there's a better pull on the flue, a dirty or poor pilot the gas is pulled away from the pilot - so the gas air mixture isn't correct.
is it open flued mf or room sealed?
the air intake on the open flued mf do get clogged easily, but it could be a blocked pilot, or a flame rectification fault
