Underfloor heating leak - diy?

[djohnson]

If anyone can give me some advice appreciated. Arrived tonight to find the heating off (property has been unoccupied for some months, agent was supposed to ensure that all was well and heating was on!). It’s an air sourced heat pump with underfloor heating downstairs. I noticed an error on the heating controller which I reset and also noticed the pressure on the expansion tank (think that’s what it’s called!) was on nil so re-pressured it. However looking in the under-stairs cupboard at the set up for the underfloor heating I found a leak as pictured. It smells damp and hence I think this has been a issue for a while. Question - is there an obvious / easy diy fix for the leaks? I’m far from competent with heating systems but got a tool kit and willing to try or do I just need a professional in the AM? (In rural Northumberland so not always easy to get plumbers out quickly).

[djohnson]

Thanks. Yep leak is above surface

[djohnson]

Hi. Thanks for all replies. The leak is from the black unit to the right of the picture. I’ll try slackening and re tightening joints.

[djohnson]

Thanks