cold rad after having towel warmer installed.

[jamesarmstrong]

Hi, Just had a new bathroom fitted which included a shiny new towel rail. Since then however the hall rad is stone cold! I made sure both valves were open which they were. I then bleed the rad but no air came out, just water. checked the TRV pin but that is moving freely. Both pipes to it are cold. I bleed all other rads in house just in case (they all work fine). Standard boiler/hot water tank/gravity fed system. Also had fancy pumped shower installed when bathroom was done.

Think i may have an air lock??? How else can i get air out of system?

Any help/advice would be much appreciated.

 

[gas4you]

Basics first. heating on, pump full speed, turn off all other rads except hall, see if this pushes it through

 

[jamesarmstrong]

will give it a go tonight. Do i just need to turm TRV's to 0 position or should i close locksheild valves as well????

 

[gas4you]

TRV's to 0 will do

 

[jamesarmstrong]

turned all trv's to 0 apart from hall rad. Pump on full speed and left for 30 mins. No luck though!

Any more ideas????

 

[gas4you]

are you 150% certain both valves fully open, not just stuck tight? Is there a drain point on or under this rad? If so you could try shutting one valve at a time and draining some water out to see if any air lock< what colour/state is the water coming out. Perhaps blocked with sludge etc. Try taking off hall rad and flushing out side with hose?

 

[jamesarmstrong]

water is ok in colour, slight grey tinge but nothing major. Thinking of taking rad off and open trv with a bucket underneath to see if i get water out, the pipes to the rad are cold so i think the airlock is in the circulation system. No drain valve on this rad.

 

[gas4you]

Pipes to rad will be cold because no circulation through rad. Check both valves and flush out rad outside aftyer trying bucket treatment

 

[jamesarmstrong]

All sorted! Air lock was in pipe from locksheild valve.