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Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3609
Experience:  Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
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UK Plumbing

my worcester bosch boiler fast flashing blue light

, boiler wont fire up
Submitted: 5 years ago.
Category: UK Plumbing
Ask Your Own UK Plumbing Question
replied 5 years ago.
Hi my name is XXXXX XXXXX lets see if we can get you sorted in the shortest possible time. Do you have the full model name and number?
Customer reply replied 5 years ago.
Worcester bosch 28i junior
Andrew Smith, Engineer replied 5 years ago.
Do you have a reset position on the knob?
Customer reply replied 5 years ago.
yes but that does nothing because that light isnt flashing
Andrew Smith, Engineer replied 5 years ago.
Do you have the approximate age or the GC number - there have been so many different versions of this boiler?
Customer reply replied 5 years ago.
Its 4 years old greenstar 28i junior .Here is what happened .....been to my g/f for xmas dont usually turn boiler off completely but did so on this occasion . Before xmas just realised shower went cold whilst using it a couple of times , whether this has any significance i dont know .
Andrew Smith, Engineer replied 5 years ago.
Can you let me know what the system pressure is?
Customer reply replied 5 years ago.
1.5
Andrew Smith, Engineer replied 5 years ago.
Do you have any power lights?
Customer reply replied 5 years ago.
Yes power ok just not igniting , with the fast flashing blue fault light flashing
Andrew Smith, Engineer replied 5 years ago.
Does the fan run?
Customer reply replied 5 years ago.
no
Andrew Smith, Engineer replied 5 years ago.
Ok. Fast blue flash;
Temperature sensor fault - outside normal parameters (8000-20,000Ω).
Low voltage wiring harness problem/connections to sensor.
Fault with Fan, fan harness or connections to fan.
Ensure Code plug is fitted and not loose.
Customer reply replied 5 years ago.
Thats what it said in book , so i am no better off
Andrew Smith, Engineer replied 5 years ago.
Do you have a multimeter to check any of these, I can go through them with you?
Customer reply replied 5 years ago.
no
Andrew Smith, Engineer replied 5 years ago.
I don't think it is anything that can solved with a simple reset.

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