Worcester Bosch 280 rsf no ch operation

[proelitegas]

Hello friends/ fellow tradesmen I have the above boiler in a landlords property that is working on dhw but not on heating. I have had a quick look and couldn't find the fault. I removed the stat and put a link in but still no operation. I also noticed the demand light was not illuminated but standby was. Now I know it's a old boiler and I'd love to remove and put in a new one but landlord is a Scrooge and won't have it. I only spent 10 mins looking at it as was late for a appointment and going back tomorrow so any guidance in getting to the fault would be greatly appreciated. Thanks

 

[rab250]

Did it have an anologue timer and was it on?

 

[proelitegas]

No mate no timer just operated off stat

 

[dancinplumba]

Have you checked mi's

 

[proelitegas]

Just looking now I'm thinking could be the divertor valve stuck in dhw position..

 

[dancinplumba]

280 RSF (discontinued February 1997) literature - Worcester, Bosch Group UK homeowner site

If there is no demand, check electrics Mebe ?

 

[proelitegas]

Yes looking in the mi's points to demand indicator but gonna go with the multimeter Tom and narrow it down.

 

[rab250]

 

[proelitegas]

Thanks dude appreciate this will help me pin point problem..:49: