Noisy central heating pump

[djh22]

Hi folks,
We have just moved in to a one bedroom cottage with a Viessmann Vitodens 100 condenser boiler with a Grundfos 3 speed heating pump which at present is on the middle speed setting,the pump is quite noisy and I'm wondering if it's safe to turn it down to the slower speed and will that effect the boiler at all.
W also have a water pressure problem and I've noticed that the boiler occasionally puts up fault code 0b does that indicate anything serious ?

Thanks.

 

[Agile]

If pump noisy thats usually worn bearings and will need to be replaced.

Setting "1" rarely gives sufficient flow but you could try it.

I dont remember fault codes but that does not seem a valid code.

You need a system pressure of at least 1.0 Bar and should get that sorted as potentially it could cause damage to the boiler.

It sounds as if your system is sludged and that needs to be sorted out properly before it gets worse!

Tony

 

[djh22]

Thanks for the quick reply Tony, sounds like there's no quick fix and I need to call out an engineer, I'll get on to it.

Cheers.