Ferroli won't turn off when timer tells it to

[nog]

Hi,

I have a Ferroli wall mounted boiler for central heating. It has a tempra sticker on it, but looking at the manuals on their website I think its its a Modena. We use the timer to managed it, it comes on perfectly at the start of an 'on' period but seems to ignore the 'off' time. Adjusting room termonstat/unit thermostat seems doesn't help, flicking to reset doesn't work either. Only solution so far has been to turn knob to off postion for a while and then reset/on and seems to stay off until next 'on' period.

Any pointers or information appreciated - had engineer service recently, had a small issue with overflow value which is fixed.

Regards,
Noel

 

[Puddle]

Would of thought important appliance is checked by a qualified boiler gsr engineer asap

 

[PlumbBobBob]

i agree

 

[nog]

thanks, any pointers on which part of appliance may be causing this?