House is still standing just about was just delayed in replacing, so I fitted the new part and set it to manual, pressed heating and the boiler fired up which it wasn't doing b4, nothing happened with the radiators so I tried to bleed the pump, I think I managed it as some water came out. Now only one radiator which is closest to the system is Luke warm, I've bled the others with no joy, also the pump it too hot to touch when the system is on. Any advice?