- Joined
- 19 Mar 2007
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hi guys - yesterday i decided to flush out or drain my entire cental heating system, all went fine flushed out sytem, refilled with fernox rust inhibitor..filled sysytem back up again and started the boiler (vaillant ecitec 831) anyway after removing all air from system, all the radiators heat up fine except one which is downastairs next room to th batroom, that is cold, iopened the bleed vave to expel any air but none present, lockshield fully open, thermostaic valve open as well or set on 6...now the bathroom towel rad is hot the pipes going to the towel rad are hot ...the pipes leading from the towel rad to the problem rad are cold.....prior to me draining out the system all rads were working fine...i tried to balance the system by turning off most rads or leving them half open but it still doesnt heat up any ideas why...?ta