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Andrew Smith
Andrew Smith, Engineer
Category: UK Plumbing
Satisfied Customers: 3629
Experience:  Domestic Gas, Commercial Gas, LPG, Unvented Hot Water, Part P Electrical, Commercial Catering
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my worcester bosch boiler fast flashing blue light

Resolved Question:

my worcester bosch boiler fast flashing blue light , boiler wont fire up
Submitted: 5 years ago.
Category: UK Plumbing
Expert:  Andrew Smith 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: replied 5 years ago.
Worcester bosch 28i junior
Expert:  Andrew Smith replied 5 years ago.
Do you have a reset position on the knob?
Customer: replied 5 years ago.
yes but that does nothing because that light isnt flashing
Expert:  Andrew Smith 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: 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 .
Expert:  Andrew Smith replied 5 years ago.
Can you let me know what the system pressure is?
Customer: replied 5 years ago.
1.5
Expert:  Andrew Smith replied 5 years ago.
Do you have any power lights?
Customer: replied 5 years ago.
Yes power ok just not igniting , with the fast flashing blue fault light flashing
Expert:  Andrew Smith replied 5 years ago.
Does the fan run?
Customer: replied 5 years ago.
no
Expert:  Andrew Smith 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: replied 5 years ago.
Thats what it said in book , so i am no better off
Expert:  Andrew Smith replied 5 years ago.
Do you have a multimeter to check any of these, I can go through them with you?
Customer: replied 5 years ago.
no
Expert:  Andrew Smith replied 5 years ago.
I don't think it is anything that can solved with a simple reset.
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