My Ferrolli Boiler is doing my head in the water runs hot then cold .ai was told by a plummer that it was my circiut board as my bath was luke warm, I bought a circuit board at the cost of £185.00 pounds and ith has improved a little but this problem still happens can you help please .The boiler is the F30 and 5 years old .
Thank you

Judith, October 2009

most likely the thermistors (sensors) you need to replace both on this boiler at the same time as the pcb takes reading from both to control the temperature. you also need to make sure that the burner pressures are correct.

Ian, October 2009