Aqualisa Quartz Digital not getting hot enough

[MickHew]

Hello.
I have an Aqualisa Quartz digital power shower, and will get fairly warm, but not what I'd call hot. The light on the switch flashes all the time, suggesting it hasn't reached the temp it should. it's on a Combi boiler, which I believe is a NO NO, but A-lisa do a special cartridge for Combi's suggesting they say it's o.k. when I turn the sink cold tap on it improves, but not a lot. I've tried turning the stopcock down, as I though the shower was asking for hot water too quickly, and the boiler "can't handle it", this doesn't make any difference, more info on request of course, any ideas. Many thanks in advance. Mick.

 

[seco services]

is it not still under warranty ?
these don't have a cartridge they are a sealed unit.
has it just started doing it ?
is it a new install ?

does it start off hot then cool down ?

 

[MickHew]

Thanks. Not under warranty, was fitted before I moved in, 6 years ago. Always worse in winter (presaume mains water is much colder then).
Has always done it. It doesn't start off hot, just warm.
Sometimes (when first turned on) goes warm, then stone cold, then warm, then cold, then warm and stays warm , Cheers.

 

[seco services]

is the dhw temp on boiler turned up high enough?
try it with the shower hose off as these are known for collapsing inside.

has it lost pressure at all ?

 

[MickHew]

Thanks, DHW is turned up to max (Glowworm 30cxi), showing 1.3bar. Will try with hose off. Nice one.

 

[seco services]

don't worry about the 1.3 bar thats only the heating side.