Intermittent radiator

stender · 2026-01-02T11:35:11+0000

I have one radiator in the house that works intermittently. it's the lowest rad in the house and has the drain plug on it. Today for example the heating is on in the house but this radiator is totally cold as are both pipes either side. We previously changed the try as it was intermittent getting hot but i assume that its not that as the pipe before it should be hot? any ideas? no air in the rad and system is full.

denso13 · 2026-01-02T12:22:53+0000

Turn all the other radiators off and see if this one heats up.

stender · 2026-01-02T12:45:44+0000

lot of effort. what will that tell me? it does come on some times without me touching anything

HERTS P&D · 2026-01-02T13:09:26+0000

Balancing issue, when the trv's on other rads reach temp, more water is pushed to this rad.

Andy

denso13 · 2026-01-02T13:16:41+0000

stender said:
lot of effort. what will that tell me?

It'll point to what's wrong with it. It's just guesswork for now.

denso13 · 2026-01-02T13:17:17+0000

stender said:
it does come on some times without me touching anything

Then the system needs balanced.

stender · 2026-01-02T13:27:35+0000

I only have trv on a couple of radiators, most are just open and close valves and all open

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Intermittent radiator

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