Worcester greenstar keep shutting down

KSProperty · Post by **KSProperty** » Sun Mar 12, 2023 6:53 pm

Hello want to pick the brains of heating engineers on here.

Got a Worcester bosch greenstar 30si combi boiler about 12 years old. Not had a single problem with it in 12 years.
Until this week. It keeps shutting down no hot water and no hot rads. Go to the boiler to find orange reset button flashing and blue oval light flashing.
I press the reset button and the boiler tries to reset but sometimes it doesn't and a 2nd time pressing reset will work and the boiler goes back to full function. but 2/3 hours later it shuts again and i have to go through the reset process again.
I've checked the condenser pipe and looks OK. I drained the condenser trap which was a bit grey but that's all clear now. The boiler pressure is fine between 1 and 1.5bars
Any ideas what the problem would be so I know what to expect when I find a plumber to come out.
Thanks

Someone-Else · Post by **Someone-Else** » Sun Mar 12, 2023 7:52 pm

KSProperty wrote: ↑Sun Mar 12, 2023 6:53 pmAny ideas what the problem would be so I know what to expect when I find a plumber to come out

Not wishing to be pedantic, but you want a heating engineer, NOT a plumber, they are different. Also I would suggest when you ring round, ask are they familiar with your boiler, and when they get there, show them what happens, (Make a video now while it doesn't work) never tell a tradesman what you think is wrong, that really upsets us. (I am NOT a plumber or heating engineer, nothing worse than being told how to do your job)

Razor · Post by **Razor** » Sun Mar 12, 2023 9:02 pm

Your need to see what the flashing means. There is a list in your manual as to whether it’s mostly on but flashing off or mostly off but flashing on etc.

Most installers are familiar with WB boilers

aeromech3 · Post by **aeromech3** » Mon Mar 13, 2023 3:27 pm

As per Razor you need a list similar to this post 2009 Greenstar exaample.
Was the trap ever full and overflow or signs of water leakage?

KSProperty · Post by **KSProperty** » Mon Mar 13, 2023 5:08 pm

Thanks for replies.
I would say the blue light looks like it's off flashing on type

wine~o · Post by **wine~o** » Mon Mar 13, 2023 6:17 pm

KSProperty wrote: ↑Mon Mar 13, 2023 5:08 pm I would say the blue light looks like it's off flashing on type

flashing on what ?

Razor · Post by **Razor** » Mon Mar 13, 2023 7:00 pm

KSProperty wrote: ↑Mon Mar 13, 2023 5:08 pm Thanks for replies.
I would say the blue light looks like it's off flashing on type

In that case you will need a decent registered gas bod. It's not going to be DIYable. Armed with the info from the light they will sort it out pretty quickly

KSProperty · Post by **KSProperty** » Tue Mar 14, 2023 6:07 pm

Update. Boiler fixed. Gas engineer been out and said its an ignition lockout and changed the electrodes. And a service.

Thanks

Razor · Post by **Razor** » Tue Mar 14, 2023 8:42 pm

Thanks for the update. Bet it’s not lighting with a bang anymore