hot water problem on worcester junior 24i

[biggsy0115]

hi can anyone help me.
I have recently had a worcester greenstar junior 24i boiler fitted but my hot water doesnt seem to run at the same temperature it changes from hot and cold then back to hot again etc. when i run the bath if i turn the cold tap on in the sink the bath then runs constant hot water and is ok. could this be a problem with to much pressure on the incoming cold supply? ive tried turning the stopcock a few times to try to reduce the flow of cold water but still does the same. Ive had a falling out with the plumber who installed it so he wont come back. was considering calling out worcester to have a look as its under warranty but dont want to call them out if its nothing to do with the boiler.

 

[bengasman]

Was the system properly flushed when the boiler was installed?

 

[biggsy0115]

well it was suppose to have been but the plumber was an idiot(thats putting it nicely) i had to report him to corgi because it took 6 months to get my corgi certificate off him. could this be the problem then?
Dont suppose your a plumber in nottm by any chance???

 

[bengasman]

There is a number of boilers that are popular with cowboys and the 24i junior is one of them.
WB has a decent reputation so they use this but buy the smallest, simplest and cheapest model whilst paying the lowest amount possible to be able to use the name as an indicator of the quality.
Invariably, they cut corners on the installation as well.
I have never seen a 24i/28i that was installed to spec.
If you want to have a reliable heating system, I recommend you find a good RGI, and let him correct all the problems.

 

[biggsy0115]

i have had corgi round to inspect it because i complained to them about not receiving my certificate. they found a few things wrong which he had to come back and fix, but obviously they would only check certain things?. would u recommend just getting it flushed properly first to see if that corrects it?

 

[bengasman]

Corgi normally inspect safety issues, not quality.
I would not do anything on a "just in case" basis.
You really need a reliable RGI to check everything