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Automatic air vent problem

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ajt2018

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41
Hello,

I have a Worcester heatslave 15/19 RSO oil combi boiler.
We have had an issue where we haven’t been able to get heat to the radiators but we had hot water.
I replaced the diverter valve cartridge yesterday as believed this was the problem when I then refilled the boiler with water we had a couple of small drip type leaks one being from the auto air vent with water dripping out the top.

I have drained the water out again and am trying to get the air vent off but it is stick rigid. The manual says you can just turn it, I have tried this by hand and with a spanner but it won’t budge.

Does anyone have any ideas how I can get it off?

Many thanks

618AC146-CA5F-4064-ACA4-A346D61514DE.jpeg
 
Grips on the body and undo
 
It will / should if you can't time to call a pro out
 
snowhead said:
They're probably a hex section at the bottom of the air vent, covered by the lagging at the moment.

Similar to these, but your's may be 1/2" or 3/8";

Automatic Air Vent Valve (Bottle Type) 3/8" BSP | eBay
Brass Compression 1/2'' Automatic Auto Bottle Air Vent Valve | eBay
Click to expand...

Snow head- thanks I’ve moved some more of the insulation to expose the bottom but there is nothing there to turn a spanner on. Is there any reason I can’t spray WD40 on the base to loosen it as there is a fair bit of rust at the bottom. Thanks

image.jpg
 
Yes to using grips on the lower part of main body.
I use Footprints grips and won’t matter if they chew the brass up a bit as going to be replaced
 
Best said:
Has Norwich got an International Airport??
I thought it was all just farm land, narrow roads and country yokels over there?
Click to expand...
Best you don`t apply for Cultural minister for EA then! :p and don`t ask for a free holiday on my boat on the broads either.
 
The problem is not the diverter cartridge. If it was you would get heat to rads all the time even on water only.

Probably more of an electrical problem clock or circuit board.

As for the air vent then it's grips on the body and off it will come. Make sure you've had your weetabix.
 
fixitflav said:
A stillson would be better than grips or rack plier, IMO. And it looks a bit big for Mole grips.
Click to expand...
Limited space for stillsons and mole grips come in a large size but at the end of day it is only around 20-25mm dia and the OP has booked somebody to attend.
 

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