My Worchester Greenstar Danesmoor External 25/32 Oil boiler showing some faulty working

sujsuj

My Worchester had a £300 service in May now it again stopped. I was curious to find what is going on as last time boiler engineer took only 5 minutes to sort out issue and he replaced filter . Costed me £320!.

I managed to reset the boiler and inn started working again!. I saw this video as well.
https://www.youtube.com/watch?v=a9C0ujLcXgA

I am keen to understand how these boilers work, some basic understanding will help a lot I think. Especially because 2 occasions I had to wait a week+ to get my regular boiler engineer available suffered in cold.

This forum made me a master of Ride-on lawn Movers.

I am adding photos of my model. Hope someone kindly guide me to some material to understand these Oil Fired Boilers. I am keen to understand from the photo below what are main components and purposes of those components in the boiler. Thanks 


(Note: I am aware this is a specialist area with certain accredited OFTEC similar Boiler engineers only ideally working/repairing.)




 

justwhat

Download the install manual and user manual would be a start. £300 for just a service and new jets/clean? Is a bit expensive.

FreeBear

justwhat said: Download the install manual and user manual would be a start.

Just had a look at a manual - Need to be careful, as it looks like the design & layout has changed slightly over the years. So try to find the manual for the specific year that the boiler was manufactured.

Precious little to go wrong, and there is no fancy (expensive) electronics to replace - Most of it is just relays, so very basic. The only electronics is going to be in the burner assembly, which Worcester appears to treat as a single sealed unit.. Digging down, the Riello RDB is serviceable, and spares available from a number of suppliers.

Another manual to download - https://www.manualslib.com/manual/1836927/Riello-Rdb2-2-Bx-15-20.html (do check the exact model and year of manufacture first).

Ganga

I used to service my ex boss,s oil fired boiler ,the part that often went wrong was the two ceramic igniters ,they often used to carbon up ,stripped them down and cleaned them ,changed the fuel filter and test, ok.

sujsuj

Issue I have is it is not turning on as per controller ie when temperature goes down or as per timer or when I press Once. But if I press reset button on the boiler Dark Red box in the  bottom  then  boiler is back working until it turns Off. next time I need to go back and do that again to start! . So something is bothering my Worchester Greenstar 

FreeBear

Ganga said:

I used to service my ex boss,s oil fired boiler ,the part that often went wrong was the two ceramic igniters ,they often used to carbon up ,stripped them down and cleaned them ,changed the fuel filter and test, ok.

I wonder if it is something as simple as a dirty burner photocell.

sujsuj

ThankFreeBear said:

Ganga said:

I used to service my ex boss,s oil fired boiler ,the part that often went wrong was the two ceramic igniters ,they often used to carbon up ,stripped them down and cleaned them ,changed the fuel filter and test, ok.

I wonder if it is something as simple as a dirty burner photocell.

I saw this video. Looks to be something I can check easily. thanks 
https://www.youtube.com/watch?v=oqNDr7pqvFg

sujsuj

Ok to be very clear what is happening is, My Worchester Greenstar Danesmoor 
which was regularly serviced (last time in May 2023) decided not to turn on as per the timer schedule. I opened and pressed Red reset button on the Red box (RDB). It worked first time and closed burner. After morning timer schedule both heater and hot water turned off as expected. In the evening it failed again to o start as per timer, another restart done the trick. Today morning again repeated same steps and all worked fine. So core functionality is working perfectly but some sort of starting trouble with timer!

FreeBear suggested dirty burner photocell, which I will check tomorrow morning if it didn't fire -up again. Any other suggestions. I can confirm oil tank is half full, so no issue with Oil. Thanks.

sujsuj

FreeBear said:

Ganga said:

I used to service my ex boss,s oil fired boiler ,the part that often went wrong was the two ceramic igniters ,they often used to carbon up ,stripped them down and cleaned them ,changed the fuel filter and test, ok.

I wonder if it is something as simple as a dirty burner photocell.

I tried to check 'photocell' as you can see from photo couldn't see anything dirty. plastic sleeve till end and bit exposed area. Thanks

ThisIsWeird

Email Worcester - tell them it's working fine, except it 'trips' on timed power up, and requires a reset - and then works fine again.

What are the typical issues that cause it to require 'reset' when it's timed to come on.

Ganga

When the timer tells it to fire up is it trying to start? if not it might be the timer not sending it a signal to start.