refilled water system

[issuemickey]

i have drained my water system to ad a radiator i have refilled it my radiators are working but i have no hot water any ideas on how to fix the problem?

[buildersmate]

This sounds like an air-lock in the HW pipes. Have you got a gravity-fed HW system - in other words, the CH pump does NOT pump the hot water around to the heat exchanger in the HW cylinder - it just relies on natural circulation? Such systems were very common until about 1980. If so, you are going to have to find a point to bleed the air out of the HW pipes.

[gasman]

If it is as buildersmate suggests a Gravity fed indirect DHW cylinder & there is a back up emersion heater in it, Then use the emersion heater to get the water hot and kick start the thermal movement, hopefully it will shift the air lock and vent naturally via the expansion pipe.

We are also assuming that when you say you have no hot water you mean that water is coming out of you're taps but not heated. Or do you mean that you have no water coming from you're hot taps at all.