DIY Doctor

cold radiator

Postby hides1968 » Wed Mar 23, 2011 6:04 pm

i replaced a insulation valve on my heating pipe .because the screw was leaking .but the last radiator will not get hot .all the rest are fine.bled the rad but it is full
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Simply Build It

Postby lofc » Thu Mar 24, 2011 6:15 am

Heating system probably needs to be balanced. Try turning down all the return valves, one at a time, till last rad gets hot. Only turn the valves slightly. If your`e not sure which are the returns make sure heating is on and feel both pipes going to the rad and the hottest one will be the flow. Hope this helps.
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Postby htg engineer » Thu Mar 24, 2011 6:22 pm

Pressurised system ?

Probably airlocked, make sure both valves to this radiator are open - turn off all other radiators - it will push through.

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