worcester bosch greenstar 28i fast flashing blue light

[beniroli]

hi people,

my boiler stopped working overnight and all i get is a fast flashing blue light after around 10 - 15 secs from switch on.

the book says its either the temp sensor (seems to check out ok at about 3k ohms)

the fan ( it does start for about 3 secs, then retries 3 - 4 times but only momentarily)

code plug ?? (dont know what this is...???)

the fan does seem a little eratic but even when it does start and run i get the same fault light flashing.

the boiler is about 4 yrs old but has never been serviced ( relevant??)

any advice appreciated!!

Thanks in advance.

Ben.

 

[Billy Bob Bob]

most thermistors should read between 7-11k cold,and yes lack of servicing is relevant burner gasket could be knackerd damaging the electrodes

 

[beniroli]

so in anyones experience, the flashing light "codes" are accurate and i should go for the temp sensor first by the look of it?

and it will be getting a service asap !!!!

 

[Billy Bob Bob]

so in anyones experience, the flashing light "codes" are accurate and i should go for the temp sensor first by the look of it?

and it will be getting a service asap !!!!

better off getting someone in to service and repair it personally i dont look at fault codes i just test components until i find out whats failed,it could be a thermistor or something else

 

[washer]

Ive had this fault a couple of times, with a fast flashing light, both times it's been the fan, never the cheap part!

You will need a gas safe engineer to look at it, CO and CO2 ratios need to be correct on this boiler when replacing any parts, if not the boiler can be dangerous and if not running correctly will cost you more in the long run with replacing parts.

 

[beniroli]

for what its worth, this prob turned out to be the fan,

worcester said it should fire up if the temp sensor is anywhere between 500 ohms and 33k.

so had to shell out £107 for a pump.

fired up instantly. bingo!!

thanks for any help.

 

[SafeGasInstall]

dont service you boiler for another 4 years ,and you can save your self enough £ to cover the pump cost

 

[Billy Bob Bob]

or watch the red burner gasket fail and set the house on fire

 

[SafeGasInstall]

then you will not have a boiler to worry about and repair in your free time

 

[beniroli]

are you suggesting the lack of service caused the fan to fail ?

is this likely/possible?