feroli modena 102 combi boiler

[bigtrucker]

I have a feroli modena combi boiler which gives me hot water for about 1 minute before switching itself off, i have had the thermistor changed, and now my plumber has put some descaler into the system to see if it is clogged up and causing the problem, If the central heating system is working and the burner running and i switch on a hot tap then the burner stops working and switches off, i have timed the burner and it switches itself on and off about every minute, even on the central heating system as well as the hot water. does anyone have any idea's please as this has been ongoing for months and jumping in and out of the shower every minute is not funny. HELP PLEASE.

 

[nicknox]

Did he change both thermistors, if not he should have.

 

[bigtrucker]

Did he change both thermistors, if not he should have.

hello, he only replaced the 1 thermistor.

 

[nicknox]

Is it locking out? i.e does it need resetting. If not sounds temperature related so get the other thermistor changed.

 

[bigtrucker]

Is it locking out? i.e does it need resetting. If not sounds temperature related so get the other thermistor changed.

I will speak to him tomorrow thanks.