On 11/02/2018 21:22, TheChief wrote:
DerbyBorn Wrote in message:
I can't understand what you mean by the radiators will not bleed - do you
mean nothing (air or water) comes out?



There are three rads on a "half" of the upstairs circuit which do
nothing when the bleed valves are opened.
They are on the same section of flow and return pipes.
Other rads upstairs issue water as do downstairs rads when bled.
I opened the lockshields and checked the pins on the thermo valves
and both were open on the rads that wouldn't bleed.


Phil


Get a paper clip or pin. Close both lockshields. Remove bleed valve.
Clean hole with paper clip/pin. Open one lock shield a TINY amount. If
air starts coming, close, replace bleed valve. Return lock shields to
previous positions, bleed as normal. If no air, try cleaning again.

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