Hi, been looking at my dad's heating today. Boiler fires, pupm pumps, mid position valve works, water pumps to the radiators but only a couple get mildly warm. All rad valves are open. Been trying to bleed pipework, but cannot fond any more air. It's a bungalow so no issue of upstairs and down. The settings on the fads have not been touched and used to work fine. Any ideas?[/quote]