crackling noise in 1 radiator after powerflush

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Hi,

I've just had the CH powerflushed and balanced and 1 radiator now seems to be making a crackling noise :eek:

Is that normal after a powerflush?

seemed to die down a bit when temperature reduced

thanks
 
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Hi,

I've just had the CH powerflushed and balanced and 1 radiator now seems to be making a crackling noise :eek:

Is that normal after a powerflush?

seemed to die down a bit when temperature reduced

thanks

I'm guessing a bit of $hit has moved or gottom into the system pal.
 
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now i've had them balanced i don't want to touch them :LOL:

i've just found a container of powerflushing chemical and a couple of tools the engineer has left behind...i'll get him to have a look when he comes to collect them :mrgreen:
 
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now i've had them balanced i don't want to touch them :LOL:

i've just found a container of powerflushing chemical and a couple of tools the engineer has left behind...i'll get him to have a look when he comes to collect them :mrgreen:

You wouldn't need to unbalance it, just close the radiator control side off, trv. Or just leave it to engineer when he returns ha
 
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there is something very wrong with the CH now :eek:

The boiler made a howling noise this morning when the wife turned it on :eek: the crackling sound is getting louder...the wife had a bath and when she turned the water off the sound of running water could be heard in the pipes and radiators :eek: :eek: :eek:


but the pressure on the boilers reading fine...not one bit off loss??

never had these problems till i had it powerflushed :(
 
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when i turned the boiler off at the control it made a short groan sound...could it be the pump?

getting a lot of air in the rads :cry:

the engineer hadn't put the air release screw that goes ontop of the pump back properly..it was just sat at a slight angle

Does this let air in as well as out?

getting a bit concerned that i might have a leak...can't find any evidence tho..pressure still holds when the boiler cools down :cry:
 
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i let the boiler cool down then restarted it....stuck my ear in and the howling/ humming noise seems to be coming from the pump...goes away after a while..

also the pump fault/low pressure warning light flashes, but the pressure never drops below 1 bar

pump?
 
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Perhaps the gauge is blocked, if your letting air out you should be putting water in.
 
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the gauge is fine..dropping the air out reduces the pressure.

bled the rads last night when the system had cooled and got some air out of a couple and topped it up again. unscrewed the screw ontop of the pump and got a little bit of air out.

pump fault/low pressure light was flashing again...phoned the engineer who said he'd come out later that night but then mother nature decided to dump a load of snow over the town

one of the rads i bled still had black water in it..and one upstairs only gets warm..it's one of those sealed rads with no valve :(

rads still making crackling sound which stops when the pump does...i wonder if the pump is struggling to pump the water around the system?
 
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the air isn't actually air!

Read on another website (can't remember which one) and someone said it might not be air/running water but could be hydrogen bubbles caused by corrosion moving around the system...He described lighting a match then slowly opening the bleed valve and you should hear a pop pop pop sound...tried it and got the same thing :mrgreen:

time to change the rad methinks :cry:
 

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