water on hot taps not getting hot after draining rads

[danped]

Hi,
I Drained my rads a couple of days ago and replaced some valves. It is a gravity fed with a Worcester boiler in the garage (not a combi) since then the hot water has not worked. The central heating has been fine. I checked the timer and it still is timed to come on and says it comes on but it doesn't!
Any ideas what I might have done?
Thanks, Dan

 

[Armo74]

Check the pipe leading into the top of the coil on the cylinder and the one coming out the bottom when hot water is on you may have an airlock.Either that or motorised valve failure.

 

[danped]

Thanks the problem seemed to sort itself out. The next day it wad lukewarm then the day after it was back to normal. Perhaps it was an airlock.