no hot water downstairs

[owenlee4me]

hi folks

need some help here, got combi boiler no probs with radiators, but my downstairs water has decided to only let me have cold!

upstairs water fine, just downstairs hotwater running cold,

any ideas please

 

[dextrous]

How many taps are affected, and what types? Initial suspicion is that you're talking about a faulty kitchen mixer.

 

[owenlee4me]

only have one tap downstairs and yes it's comi tap, the tap has been fine, but the pipes leading to the tap from upstairs are cold too?

thanks for helping