Shower running hot and cold

[DBarthelemy]

Hi All, hope you can help me out. I have been struggling with my hot water in my house since i moved in. Never been particularly hot but recently the shower started to fluctuate between hot and cold. I had some guys in to fix it and it seemed to work for a while but now it has started all over again. The boiler I have is a Halsted Ace High which I know nothing about so would appreciate any advice.

Reading the forum on here Rob seems to know about them, any comments?

Cheers

 

[joe-90]

Does it do the same when you run a hot tap or just the shower?

 

[DBarthelemy]

No the taps are fine, just the shower. Had the cartridge replaced, limiting valves attached and all sorts. I have had guys in for a number of days trying to figure this one out but it looks like a bigger mystery than the bermuda triangle! If i run the shower in question which is in the loft extension, and any other tap the shower also goes cold, hot water elsewhere appears to be fine

 

[joe-90]

What if you turn the output of your shower down so that less water flows?

What time period does it fluctuate by?

 

[DBarthelemy]

Tried turning it down and it doesn't seem to do much, the other guys put some pressure limiters on to control the flow of the cold and it did not impact it. The shower goes hot and cold over about 30 secs and fluctuates the whole time it is running