Ensure efficient steam heating. · here’s the thing: In todays video, youll learn how to fix a hissing steam radiator and remove, prepare and install a steam radiator valve. Learning how to replace air valve on steam radiator is one of the easiest diy repairs you can do. · learn to troubleshoot issues, such as a steam radiator not getting hot. All you will need is a new valve and some hands to get the. · radiator maintenance and bleeding explained for hydronic and steam systems, covering air removal, valve checks, common problems, and seasonal upkeep to improve comfort and system performance. Understand air vent function, diagnose failures, and complete replacements for balanced radiator performance. And it can save you a fortune in heating bills. Steam radiator problems can often be fixed by cleaning or replacing the air vent. In this short video i walk you thru the steps in removing the male end of a steam air vent valve that often breaks off inside the radiator. In this article, we explore how to fix a whistling and leaky steam radiator , guided by the expertise of this old house plumbing and heating expert richard trethewey.