WB Heatslave ii not powering up

Joined
15 Apr 2015
Messages
5
Reaction score
0
Location
Somerset
Country
United Kingdom
After switching my consumer unit off temporarily to check a switch, my boiler (oil WB Greenstar Heatslave ii combi, only a few months old) won't come back on. The LCD is blank and the wireless thermostat had a Fault A21 which just means it can't find its friend. Any ideas?

I've checked the FCU all the way to the boiler which looks fine and has power. I haven't found any obvious fuses inside the boiler which might have blown.

WB are closed until Monday so won't be any help soon. It's starting to get a wee chilly in the house so any help gratefully accepted (not to mention no hot water).
 
Sponsored Links

snb

Joined
10 Oct 2007
Messages
3,470
Reaction score
1,143
Location
Norfolk
Country
United Kingdom
are you certain that you have 230v to the boiler?
have you checked the 5a fuse on the pcb of the boiler?
 
Joined
15 Apr 2015
Messages
5
Reaction score
0
Location
Somerset
Country
United Kingdom
I moved house recently and can't find my multimeter so can't be 100% sure, but have tried lamps and other items in the FCU connection, all of which work. I've just had the motherboard out and can only find the one fuse which is accessible from the front which I changed out, still no joy. Couldn't see any burning, melting or poor connection on the mobo. Could be that both the fuses are dud, hard to check without a multimeter. The fact that they provide a spare fuse on the inside of the fascia says it all for me. You don't supply spares unless you expect something to go wrong!
 

snb

Joined
10 Oct 2007
Messages
3,470
Reaction score
1,143
Location
Norfolk
Country
United Kingdom
most boilers come with a spare fuse, and most boilers get skipped before the need to use them!!!
 
Sponsored Links
Joined
15 Apr 2015
Messages
5
Reaction score
0
Location
Somerset
Country
United Kingdom
I've got it running off an extension lead, something must be up with the FCU's supply. I'll get hold of a multimeter and check it out. Thank you for your suggestions.
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Top