***Please help!!!***thermo static shower cabin water going cold

[kylecara]

Hi everyone...hoping someone can help with the ongoing issue.

long story short, shower (non electric thermostatic shower) was going cold intermittently.

shower replaced, issue still occured.

boiler serviced (Worcester bosch green star 28i junior) heat exchange plate replaced by bosch engineer, issue still occured.

engineer said that what is happening is the boiler is heating up the water but the flow is not quick enough so the water is backing up causing the boiler to cut out, hence the water going cold...once the boiler regulated the water goes hot again.

can some please advise on how to rectify this problem as weve spent quite a bit of money and are no further along.

boiler is situated in the loft...if we got pipework directly from the boiler to the shower could this resolve the issue?

or do we need a pump to push water through faster?

or is it something else?

the shower model is attached to show you...thank you in advance

 

[kylecara]

not sure if the people who tried to help will still see this but I just thought I'd update you on my progress. so basically today I took the shower head off the hand held shower hose and ran it on hot straight from the hose in the shower itself. good news it stayed hot...so went out and purchased a different shower head that was a non eco version, and a wider shower hose pipe...connected them both and hey presto had a 45 minute shower that stayed warm for the first time in over a year!!! I'm just praying it's not a fluke and it stays like this.