• Welcome to PlumbersForums.net - The international free plumbing advice forum. Professional plumbers sharing advice with fellow plumbers and DIY alike. Register for free today! - Checkout the Plumbing Advice forum and then our Plumbing Videos area which still needs populating.

Discuss Heatslave 12/14 No Hot Water (for a week now). :-( in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

M

Mark from Wales

Hi all.

I have a 20 year old Worcester Bosch Heatslave 12/14 Oil-fired
I'm getting about 20 seconds of hot water, then the boiler won't fire.
I can crank the HW dial right up and it'll fire and give me another 20 secs of hot water.
It won't fire again with demand from the tap.

It was losing pressure last week, plumber has changed the braided hose to the expansion vessel and the pressure relief valve. Made no difference to the hot water supply.

So, it can fire, but it seems it doesn't know when the tap is running to keep the burner going?
 

Undertrained

Plumber
Gas Engineer
Messages
1,551
Solutions
2
If it’s not registering a tap demand, that could be the sensor?
 

exedon2

Esteemed
Messages
784
You really need a experienced oil service engineer.
First thing I would be checking would be flow switch.
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
Messages
31,249
Solutions
2
Could be something simple as the pump or valve
 

Reply to Heatslave 12/14 No Hot Water (for a week now). :-( in the Plumbing Forum | Plumbing Advice area at PlumbersForums.net

Similar threads

C
Thanks for posting! I have moved this to the central heating forum,
Replies
15
Views
672
Lou
G
Replies
26
Views
3K
geofear
G
B
If the hot water tap(s) (post #7) can continuously flow say 15 LPM at 40C (assuming a 30kw combi) then IMO not a whole lot wrong with the Hx...
Replies
18
Views
899
John.g
J

Newest Threads (Please Reply)

Search Forum

Top