We have just had a new boiler and new bathroom fitted.
Shower and bath work fine - takes a minute or so for water to heat up, its a combi boiler and the boiler is on another floor to bathroom. However the sink tap in bathroom will not get hot unless either a shower or bath has been run.
My guess was that the sink tap does not create enough pressure to really get the boiler going, and the pipes need warming up.
To clarify the water from sink gets luke warm, at best, with no shower/bath. While if sink tap is run shortly after shower/bath the water is perfectly hot (~60c as expected)
Any tips ?