Hot water goes cold then hot from com bi boiler

Question

is this normal

Answer 1

When you first turn on the hot water tap, the water in the pipes is going to be cold for a little while until the hot water from the boiler moves through the pipes.  If it is staying cold for a long time then there may be some control problem with the boiler.  You might want to describe the situation a bit more to get a more specific answer.