Kitchen hot water tap not working

[AB123456]

Hi, I have just moved into my first home which has a Worcester combi 24cdi boiler. I have two plumbing issues which I would be grateful for some advice.

1. I get no hot water in the kitchen mixer tap unless the central heating is on. The toilet hot water works fine even without the central heating turned on. I recently increased the boiler pressure to 1.5 as it was below 1 - I am not sure if this has anything to do with it?

2. The central heating in my middle room is not working. I have bled the radiator and there was no air in there. The water pipes to the radiator are not warming up either.

Thanks in advance for your replies

Abs

 

[Deleted member 120897]

Check both valves on the radiator are open, if they are, check the pin on the trv (if there is one).

Can you isolate the cold on the mixer tap?