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RAds don't get hot anymore

RAdiators don't get hot anymore. All radiators bled. All radiators shut off and turned on one by one to see if it is one radiator. Both pipes(in and outlet) on each radiator are slightly warm. All rads bar 1 have TRV's (no main thermastat). Turn heating on via boiler, rads get luke warm but thats it. Boiler kicks in for approx 45 secs then turns off. This repeats constantly
. Boiler is SIME and pressure needs upping daily.
I had one leak but this appeares to have ceased now.

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  • martin484joy Feb 06, 2009

    Thanks for that , there is a leak (outlet pipe drips but not loads), it must have been for a while though cos the paint on the brickwork is coming off under the pipe outside. If it is the expansion valve can I fix it or will i need to call someone??? Will it be expensive???

    p.s. the rads up until a few months ago used to get 'very' hot as I used to keep the one in my little girls room turned down because of this...

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Rads not heating could be down to old system ie pipework etc and sludge building up. r there any cold spots on rads? when boiler turning off do u mean going to reset? if so could be over heat prob at boiler . there should be a pressure pipe coming from boiler going to outside if its a combi. if this is leaking your expansion vessel might need re charged as this is where the water will be going.

Posted on Feb 06, 2009

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