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Drained Heating Systems and Added New Rad Now no Hot Water

Postby Uselessdiyer » Wed Feb 22, 2017 9:55 am

Hi, hope someone can help.

I drained my heating system and installed a new radiator in my bathroom and since doing so I have no hot water. There is water coming from the tap, however it is cold.

I have a gravity fed system, cold water tank in loft, hot water cylinder tank in bathroom and gas boiler in utility room.

From google I understand that there is maybe air trapped in the system somewhere. Would this be in the rads or in the tank it self?

I should add the heating is fully functional and rads are hot.

Would love some advice and a how to guide to solving the problem.

Thanks in advance.

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Simply Build It

Postby stoneyboy » Wed Feb 22, 2017 6:52 pm

Hi Uselessdiyer,
Your boiler will have a flow and return to the hot water cylinder - the connections usually go into the cylinder about 1/4 and 1/2 way up. There should also be a vent pipe in the top connection/pipe going up into the cold water tank.
With the hot water being called for feel the flow and return pipes and they should be hot - if not it may be that the vent pipe is blocked - unblock it. If there is no vent pipe you will have to slacken the highest joint in the system to allow air out.
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