TXVs: Contamination, Sticking, and Troubleshooting

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Webinar On-Demand
Sponsored by Danfoss
Presented by Jeff Staub

Learning Objectives:

  1. A detailed understanding of thermostatic expansion valve function, including the importance of superheat.
  2. A thorough understanding of symptoms and causes of contamination in the a/c system and the impact on expansion devices.
  3. A step-by-step checklist for troubleshooting systems believed to have contamination.
  4. A 'how to' guide to avoid common installation problems with TXVs.


This test is no longer available for credit
Photo of a valve.

In 2014, the HVAC industry experienced broad contamination issues with thermostatic expansion valves. This educational webinar will help to clarify the TXV issues by providing: an overview of TXV function; an explanation of the impact and symptoms of contamination on the TXV; a description of the solutions; troubleshooting guidance for when a system is believed to be contaminated; and insight on common installation problems uncovered during an in-depth technical investigation into the issue.

Jeff StaubJeff Staub is Application Manager for Danfoss in North America. With more than 15 years of HVACR experience, he is responsible for all levels of customer application support for the company's diverse product portfolio for refrigeration and air-conditioning sectors, including compressors, controls, heat exchangers, and line components. Jeff began his career in Danfoss as Application Engineer. In 2002, he was appointed Technical Services Manager in Mexico where he was responsible for establishing the production of Danfoss filter driers and thermostatic expansion valves. In 2007, he was named Application Engineering Manager at the company's North American headquarters.

Danfoss logo.

Danfoss engineers technologies that enable the world of tomorrow to do more with less. We employ 23,400 people and serve customers in more than 100 countries. We meet the growing need for infrastructure, food supply, energy efficiency and climate-friendly solutions. http://www.danfoss.us/home/