Worc Bosch boiler playing up...

[macman]

Had a new Worcester Bosch Greenstar 37 fitted just over 9 years ago, brilliant boiler, never a problem. Then two weeks ago, no hot water. Up into loft to find boiler dead. No lights, nothing. Nada. Called out the Plumbing/Heating firm that fitted it/did the re-plumb of the house, who took the front off, had a look & a fiddle and found the isolation switch next to the boiler had burnt out due to "a standard 13a fuse being left in the switch when fitted, instead of being changed for a 3a fuse..." (we had the whole place rewired at same time as new boiler) - so he advised me to fit a new isolation switch & 3a fuse which I did. The boiler now started up and worked as before.
Then a few days later, no hot water. Odd. Up into loft to see a flashing 'EA' in the digital panel. I did the 3-second reset, did the trick, all was fine again. Since then, it's been doing this every few days. 'EA' seems to flash ON for longer than it's off, with the alternating blue light, if that makes a difference?

So I wonder if anyone might be able to give me a pointer as to what is going on? Rest assured I am NOT going to get involved if it's anything more than a push-button fix that I can easily do. I just want to know if this is a known issue before I spend more money for a callout charge/service fee!

Thanks in advance - hoping someone can offer some advice!

 

[ianmcd]

So the fused spur burnt out because it had a 13 Amp fuse instead of a 3 Amp ???? total rubbish, if it popped a 13 Amp then there is a real problem with your boiler or its electrics, the EA on the boiler is not connected, that is a different problem

 

[macman]

Thanks Ian. From what I understand, the actual fuse was ok. Trouble is, as someone who knows zip about these things, I could be told anything... The 'live' wire from the boiler inside the fused isolator switch had burnt through so had lost contact - see attached image. I think we probably need to call in an electrician to check it out...

 

[terryplumb]

Looks like it was a loose connection to me.

 

[dilalio]

Arcing

 

[macman]

May well have been a loose connection to cause the burning, as you say, but having replaced the isolator switch & fuse (for a 3 amp...) I'm still left with this EA error every few days.
Any ideas why this may be happening? The boiler is not quite yet 10 years old, so is possibly still under warranty...

 

[durhamplumber]

he advised me to fit a new isolation switch & 3a fuse which I did.

Seems odd,why did he not fit it.

 

[durhamplumber]

so is possibly still under warranty...

If not,your best option could still be a fixed price repair and warranty from WB.It could be numerous things.

 

[macman]

He said he was not allowed to do it when I asked him - not certificated to do it, he said he was "on the technical side of things..."! I ended up fitting the switch myself.

 

[bernardgreen]

When you replaced the isolator did you ensure that the screw was pressing onto the wire and not onto the terminal plate with little if any pressure on the wire

Bending a U end to the bare wire creates a better connection

 

[macman]

If not,your best option could still be a fixed price repair and warranty from WB.It could be numerous things.

Yes, I guess so...

 

[macman]

When you replaced the isolator did you ensure that the screw was pressing onto the wire and not onto the terminal plate with little if any pressure on the wire

View attachment 164774

Bending a U end to the bare wire creates a better connection

Yes, I did several years in Avionics a long time ago, but those lessons in how to make a firm connection never leave you! But a great reply, thanks!

 

[ianmcd]

looks like it has had a poor connection, cut the wire and strip it and make a good tight connection and fit a 3 Amp fuse, the post about a fixed price repair from worcester wont work they will not repair anything outside of the boiler

 

[durhamplumber]

looks like it has had a poor connection, cut the wire and strip it and make a good tight connection and fit a 3 Amp fuse, the post about a fixed price repair from worcester wont work they will not repair anything outside of the boiler

Lol...stop taking those drugs ffs ,,the hot water issues are certainly to do with the WB appliance!

 

[ollski]

When was it last serviced?. I’d look at the condensate trap before anything else