hot and cold shower????

[drainrod]

ideas pls?

have combi system, Worcester 35cdi boiler, grohe thermostatic biv shower
been I for about 13yrs, shower worked fne, then started to turn cold when showering-then turn hot again-cold-hot
then worked perfect for months now started its tricks again

help
cheers

 

[SimonG]

Filters need a clean or the cartridge is goosed.