Has this been resolved ? Anyway we had a similar problem a few years back - basically a lack of flow. It turned out to be an innocently looking anti-gravity valve. This looks like a 22mm connector usually just above the pump but inside this is a little brass disc that stops convection in the CH circuit when the pump is not on in the CH direction. The valve gets gunged up and flow is restricted. I just took out the valve and full flow was restored. Still running on the old Kingfisher cast iron boiler !
Central Heating Only Coping With Heating 3 or 4 radiators
- Thread starter altsaint
- Start date
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I used to have a Profile, and as well as a chemical clean and drain, I added a Magnaclezn.
I found it very satisfying to see that residual loosened sludge was captured for many weeks afterwards. The sludge gets disturbed every time you work on the system, and trapping whatever circulates reduces the risk that it will accumulate into a blockage.
I found it very satisfying to see that residual loosened sludge was captured for many weeks afterwards. The sludge gets disturbed every time you work on the system, and trapping whatever circulates reduces the risk that it will accumulate into a blockage.
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