I've had this boiler for about 3 years with no problems. Over the last couple of days the domestic hot water has not heated up properly - i.e. it has only got luke warm.
I watched the display and although the water is set at 60 degrees it only reaches about 46 before the burner cuts out and the temperature then drops to about 42 before the burner ignites again.
On one occasion the water failed to heat at all and there was a fault code F.64 . in the manual this means "Electronics/NTC fault Short-circuit in flow or return NTC or electronics defective"
Any ideas if there is a simple solution or am I in for a hefty repair bill?
I watched the display and although the water is set at 60 degrees it only reaches about 46 before the burner cuts out and the temperature then drops to about 42 before the burner ignites again.
On one occasion the water failed to heat at all and there was a fault code F.64 . in the manual this means "Electronics/NTC fault Short-circuit in flow or return NTC or electronics defective"
Any ideas if there is a simple solution or am I in for a hefty repair bill?