Hot water, but only just

[Littlespark]

Got a Worcester combi boiler that gets serviced every year through BG, but we are finding that the hot water is never that hot.

I think the water is passing through the boiler too fast and doesn't get a chance to heat properly.

Very noticeable on the bath, where we have to close the tap down quite a bit until the flow rate reduces coming out the tap.

Is there a way to reduce the flow rate as it goes through the boiler?

 

[Rob Foster]

I’ve been out to check. Boiler is a Worcester 30CDi, not 37 as I first thought.

that might explain a lot
chk

 

[Littlespark]

I just assume that if BG service the boiler annually, they optimise it to give the best that it can be.

 

[Steve weightman]

By not turning on the tap slow first then when hot then faster acts in the same way as a combisave so in my opinion a waste of money

 

[decomplexity]

Even though to get hot water you need to close the tap to a trickle but believe you can get adequate flow - albeit if cold, the alternatives are simply that either the **amended as mentions boiler repairs**. I realise that either of these should affect the total flow and not just hot flow, but I have seen exactly this symptom on a W-B 34 combi in a very hard water area (Bath). If either prove to be the problem, you could - after fixing - also install a CombiMate to help reduce its tendency to scale the DHW side (the CH side should not scale).

 

[Littlespark]

It’s Scottish water, so doesn’t have the scale problems as other parts of the uk.

Beginning to sound like it could be a number of things.
Maybe I’ll just contact bg to fix as I have their repair plan

 

[Riley]

Deleted

 

[Riley]

Please do not give boiler advice in open forum