towel rad cold at top

[briggs]

Here\\\'s the problem.
Towel radiator upstairs slowly seems to be getting cold at the top (approx 1 \\\"rung\\\" every 2 days). There doesn\\\'t appear to be any drop in pressure on our combi. I\\\'ve bled the towel radiator a couple of times but the cold area at the top keeps returning. Any ideas? Am I likely to have a small leak somewhere or is there anything else I can look at?

 

[ChrisR]

Try putting corrosion inhibitor in the system.

 

[patagonia]

Briggs - Did you try this and did it work?

 

[gas4you]

After bleeding the towel rail, did you top up pressure each time?