Hi

I have a Myson Apollo boiler.

The electricity supply to the electronic heating controls has blown the fuse. I replaced the fuse and it blew again straight away.

There doesn't seem to be a problem with the electronic heating controls themselves as they are still running on the battery backup but won't active the boiler.

Does anyone know what might be causing this to happen. I think there must be a problem with some part of the heating system eg. the fan on the boiler or the pump but not sure where to start.

Any suggestions much appreciated.

sjc, April 2009

Is it the 3amp fuse for the pump. This can blow if the load is too big for the pump. Usually sluge in the system.
You can buy flusing agents.

simon, June 2009

Start at the Pump, is it seized? when the wiring cover is removed is there a nasty smell? both these are a sure sign of a failed pump.

Boiler Repairman - Ipswich, April 2009