My hot water is not quite as hot.

[d000hg]

We have a Combi boiler, 20kw baxi of some sort. The last couple of days the hot water has gone from scalding to just very hot, you can just hold your hand under the tap. Temperature is constant, no sign or overheating cut out.

It's been regularly serviced and both heat exchangers recently replaced and the system purged.

Could it just be the colder weather means it cannot heat a hot tap on full blast as the water is cooler, is that something that happens?

 

[ianmcd]

We have a Combi boiler, 20kw baxi of some sort.

you do not have a 20 KW combi , tell is what model you have , you do not get 20KW combis

 

[Newboy]

Could it just be the colder weather means it cannot heat a hot tap on full blast as the water is cooler, is that something that happens?

Yes - incoming water cooler

 

[Harry Bloomfield]

Could it just be the colder weather means it cannot heat a hot tap on full blast as the water is cooler, is that something that happens?

Yes, the water coming up through the pipes in the ground will be colder, so with a similar flow - your hot water will not be quite as hot. You might be able to get it hotter, by reducing the flow a little at the tap.

 

[d000hg]

you do not have a 20 KW combi , tell is what model you have , you do not get 20KW combis

Sorry, 40kw. baxi duo-tec combi 40 he a.

Is it relevant it's not 20kw?

 

[ianmcd]

Sorry, 40kw. baxi duo-tec combi 40 he a.

Is it relevant it's not 20kw?

Yes you do not get 20KW Combis

 

[d000hg]

Yes you do not get 20KW Combis

How is that relevant to my question though? If it's 28 or 32 or whatever would that matter?

Btw I found several from a simple Google "20kw Combi boiler". Like this: https://www.boilerguide.co.uk/productinfo/firebird/enviroblue-combi-oil-boiler-20kw

 

[ianmcd]

How is that relevant to my question though? If it's 28 or 32 or whatever would that matter?

Btw I found several from a simple Google "20kw Combi boiler". Like this: https://www.boilerguide.co.uk/productinfo/firebird/enviroblue-combi-oil-boiler-20kw

That is an oil boiler with a heat store not a combi, and of coarse it is relevant, how are we supposed to advise you if we dont know what you have

 

[durhamplumber]

How is that relevant to my question though? If it's 28 or 32 or whatever would that matter?

Btw I found several from a simple Google "20kw Combi boiler". Like this: https://www.boilerguide.co.uk/productinfo/firebird/enviroblue-combi-oil-boiler-20kw

Hint...Ianmcd is one of the most helpful guys on here..! Just saying.