Worcester Greenstar 30 CDI fault code E9

arran197 · Jan 2, 2015

A mate of mine has been to have a look at the above boiler with fault code expires E9 displayed. Apparently means seized pump, overheat stat fault or so he tells me. He's put a Grundfos 15-60 on it, it still didn't work after he swapped over the pump electrics, which I have now had a look at. The box on the side of the original pump has a pcb in it, live neutral and earth connections, but then also has another connection with 3 other wires going to it. The stat has continuity through it and when you run the boiler it kettles up quickly with no circulation.

Now I assume I'm barking up the right tree here, the pump had 240v on the live and a resistance of 152 ohms. I think it looks like the pcb has failed on the pump, it also smells a bit strange.

Anyone know if this sounds correct and that only the original type pump is suitable? It's an expensive part, with part number 87161063540.

Thanks.

lame plumber · Jan 2, 2015

like for like always tends to work better.

bigads28 · Jan 3, 2015

Always use the correct pump! https://www.heatingspares247.com/pumps/worcester-pump-assembly-87161063540-p-1007.html

billybob150811 · Jan 3, 2015

british gas combi fault finding book mention Worcester bosch pump certain models cant be changed for just a head think its the 350 they mention

leethegasman · Jan 3, 2015

arran197 said:
A mate of mine has been to have a look at the above boiler with fault code expires E9 displayed. Apparently means seized pump, overheat stat fault or so he tells me. He's put a Grundfos 15-60 on it, it still didn't work after he swapped over the pump electrics, which I have now had a look at. The box on the side of the original pump has a pcb in it, live neutral and earth connections, but then also has another connection with 3 other wires going to it. The stat has continuity through it and when you run the boiler it kettles up quickly with no circulation.

Now I assume I'm barking up the right tree here, the pump had 240v on the live and a resistance of 152 ohms. I think it looks like the pcb has failed on the pump, it also smells a bit strange.

Anyone know if this sounds correct and that only the original type pump is suitable? It's an expensive part, with part number 87161063540.

Thanks.

The three other wires you are talking about on the pump will be for modulating

arran197 · Jan 4, 2015

That's what I assumed they were for. My mate swapped over all the electrics to the other pump, but that still didn't run. I think it's actually the pcb on the pump that's gone, so will have to get the whole thing. I think the customer is going to order it for us and we'll fit it, he's got the part number.

gassafe · Jan 4, 2015

Yeah the pumps on cdi's are modulating so couldn't like to fit a regular grundfos head lol!

The last pump on a cdi I changed the pump bit was like brand new but the capacitor in the big electronic box on the side had a big split in it!!

arran197 · Jan 4, 2015

The pcb on it smelt a bit burny. Ha ha!

moogwai · Jan 8, 2015

ent it cheaper to buy the pump kit on these instead of just the pump head?? always best to replace part for part on the newer boilers......could get away with on the older non modulating pumps.

leethegasman · Jan 8, 2015

moogwai said:
ent it cheaper to buy the pump kit on these instead of just the pump head?? always best to replace part for part on the newer boilers......could get away with on the older non modulating pumps.

Yes the pump kit is cheaper than the pump head does not make any sense.

arran197 · Jan 9, 2015

New pump fitted and it was working. Won't fire for central heating though now, but I haven't been back to it and my mate has given up with it! I think he was getting fed up of going back there tbh.