Four CH pump failures within 10 weeks - help!

[Jon E]

I had a new Worcester Bosch boiler installed by British Gas at the beginning of May. All was going ok until the pump failed within two weeks (it had always behaved pretty well until then). BG replaced it. Then the replacement packed up within another two weeks and so I started wondering if there was a problem with the system rather than the pump - BG replaced it for a third time and just said that it was 'probably a faulty batch of pumps'. I thought that was pretty unlikely but I'm not an expert.

This last pump must have been a real tough cookie because it managed to hold out for a whole three weeks until it packed in again tonight :mad2:. That makes four.

I've called out another British Gas engineer but there surely must be a system problem to keeping causing new pumps to pack in. I complained to the BG area manager and he didn't seem to want to know.

Does anyone have any idea what might be causing this? Sludge? The system wasn't power flushed as part of the install (BG didn't recommend that it should be).

Thanks for your help.

Jon :confused5:

 

[ShaunCorbs]

do you know what the pumps looked liked when you guy replaced it ?

 

[kris]

Even bit of grimme , 4 pumps wow. Is it the pumps siezing or problem with power to the pumps. The AAV probably shut lol

 

[Jon E]

Nah - he just whisked it away and said that it'd failed.

 

[Jon E]

I think it's the pump seizing. The one installed tonight has power it just clicks a bit and doesn't do anything. It's a Grundfos Alpha 2

 

[ShaunCorbs]

so heat only boiler and cylinder?

 

[Jon E]

Shauncorbs: yep I'm pretty sure it's a heat only. There's a cylinder and cold water tank in loft.

 

[gassafe]

Very odd, even a dirty system would struggle to kill 3 pumps like that!

Faulty batch or something, but unusual for grundfos!!

 

[stevetheplumber]

i would be escalating the complaint to bg ask for a tech manager to visit

 

[Alpha man]

No bypass probably?

 

[zzzjim]

Ask how well light bulbs last ,if its not a feature of heating system , may be the environment . ( Or just the feed its attached to )