Worcester 24Si II - Intermittent fault

B

Baxter111

Joined
28 Jun 2011
Messages
50
Reaction score
1
Location
Lancashire
Country
United Kingdom
Hey All,

Moved into a new house (to us) before the Christmas period, and the boiler has started to play up, yes, it's old, but if not budgeted for a new boiler, so if I / expert can fix it, it'd be a win-win.

The boiler has gradually worsened, but it basically fails to start up, and then a red flashing light appears, and I need to reset it. It then continues to run again for around an hour or two and then stops again, and I need to reset it. It seems to happen when we switch between hot water and heating.

When I reset it, it sometimes takes 2/3 attempts to start.

The pressure when cold is set around 1bar, it seems to have an automatic fill system on it, should the pressure drop and when hot site around 2 bar.

Any help would be great.
 
It could be a number of things to be honest. Get someone to check it over, you can also get a manufacturer's fixed price repair, depending on the make of boiler.

It could be something simple.
 
denso13 said:
It could be a number of things to be honest. Get someone to check it over, you can also get a manufacturer's fixed price repair, depending on the make of boiler.

It could be something simple.
Click to expand...

Thanks for the reply!! Just so I know what to pass on to the heating engineer, do you have any suggestions for them?

I'll have a look at the fixed price repair.
 
Baxter111 said:
Thanks for the reply!! Just so I know what to pass on to the heating engineer, do you have any suggestions for them?
Click to expand...
Hard to say what to pass on as it depends where in the sequence it fails. Just call an engineer explain the age, make and model and symptoms or fpr.
 
Waiting for the engineer to come and I've done some more diagnostics.

When the boiler is running, if you try and turn down the rad temperature directly on the boiler, it instantly cuts out and needs resetting.

Could this be overheating?
 
Baxter111 said:
Waiting for the engineer to come and I've done some more diagnostics.

When the boiler is running, if you try and turn down the rad temperature directly on the boiler, it instantly cuts out and needs resetting.

Could this be overheating?
Click to expand...
If you have turned down the target (rad) temperature by more than the flowtemperature, (which is normally at the targettemp) -5C then the burner will trip and will not refire again until the anti cycle time has elapsed, under normal conditions this only happens if the heating (rad) demand is less than the minimum output of the boiler, the actual flow temperature will then start rising and when it reaches the Targettemp+5C then the burner will trip but doesn't require resetting, as its not a alarm condition, the boiler/burner will just cycle on/off.
 

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

 
You must log in or register to reply here.

Similar threads

F
Worcester 24si ii
Replies
6
Views
2K
kevplumb
kevplumb
G
Boiler doesn't start - Bosch Worcester 24Si II
Replies
13
Views
14K
dilalio
dilalio
D
Worcester 24SI II Boiler problems
Replies
0
Views
2K
deacs
D
W
Worcester 24Si II PCB replacement.
2
Replies
17
Views
10K
W4SIM
W
R
Worcester 24 si II
Replies
1
Views
939
fine tune
F
Back
Top