Skirting heating anyone?. I went to a job today and he had a new combi fitted 8 weeks ago. He has skirting heating all over the house,since new boiler went in its been working upstairs nothing down,it was ok on old combi and when he got the firm back who done new combi,they turned upstairs off,pulled it through and it went for a day. I went today and it's just a loop system so i fitted is/valves in the pipework upstair's and balanced them ,so after the tees for the drop.s it's running as low as it can,but can you think of anything ive not thought of.I dont to p/flush it and it does nothing ,as it does work . I left after 3 hours with it all working ,but i know he will call and it's not going.