Worcester Bosch Greenstar 37CDi combi boiler

Fairwinds

We had the above boiler fitted in 2008.

Recently, the hot water temperature has started to badly fluctuate, most noticed when running a bath, although our older shower was also affected ( newer shower is fine, possibly less powerful).

It will maybe be ok for upto a minute and then temp will drop to just above cold for maybe 20-30 seconds before starting to reheat and be okay for another minute or so and the cycle will repeat.

The bath temp is possibly okay when flow reduced quite a bit.

Anyone any ideas what the problem could be ( please don't be expensive!) from that vague description -

Many thanks for any help

gas4you

Blocked plate heat exchanger on the system side.

Needs removing and chemically flushing out.

Probably around £100 + VAT and a PITA being a Worcester.

Fairwinds

What's a pita if you don't mind me adding?

Leif

GordonD wrote: »

What's a pita if you don't mind me adding?

A flat bread. Or a Pain In The Backside.

southcoastrgi

Did the installer fit a scale inhibitor on the cold feed to your boiler ?

PITA = pain in the a ss