In this Episode of the HVAC Know It All Podcast, Host Gary McCreadie is Joined by Jamie Kitchen, an HVAC Expert from Danfoss, to Break Down How Heat Pump Thermostatic Expansion Valves (TXVs) Work and Why Check Valves are Essential.

Jamie Kitchen explains the differences between heat pump Thermostatic Expansion Valves (TXVs) and straight cooling TXVs, why heat pump valves need built-in check valves, and how refrigerant flow reverses in heat pumps. They also discuss the evolution of expansion valves, the transition from pistons to TXVs and now to electronic expansion valves (EEVs), and why technicians often misdiagnose TXVs as the problem.

This episode is packed with technical knowledge, troubleshooting tips, and expert insights that will help HVAC pros better understand metering devices, improve system performance, and reduce misdiagnoses.

Jamie Kitchen shares insights on improving technician expertise and fostering a deeper understanding of heat pump TXVs and check valves. He highlights strategies such as mastering refrigerant flow dynamics, adopting universal TXV kits, and recognizing common misdiagnoses. This episode provides practical advice for HVAC professionals looking to enhance their troubleshooting skills, work more efficiently with modern TXVs, and stay ahead in the ever-evolving HVAC industry.

Expect to Learn:

1.The key differences between heat pump Thermal Expansion Valves (TXVs) and straight cooling TXVs

2. Why built-in check valves are crucial for heat pump operation

3. How refrigerant flow reversal works and why it impacts TXV performance

4. The transition from pistons to TXVs to electronic expansion valves (EEVs)

5. Common misconceptions and troubleshooting tips for TXV-related issues

Episode Highlights:

[00:00] – Introduction to Jamie Kitchen

[01:31] – Understanding Heat Pump Thermostatic Expansion Valves (TXVs), Check Valves & SEER 13 Transition Lessons.

[03:24] – TXVs vs. EEVs: Key Differences & the Importance of Precise Control

[05:26] – TR6 Valve in HVAC: OEM vs. Aftermarket TXVs & the Simplicity of Universal TXV Kits.

[10:07] – Secret Sauce in TXV Bulbs: How refrigerant mixtures impact performance

[15:23] – The Role of Check Valves in Heat Pumps. Preventing reverse flow issues.

[16:28] – How the Check Valve Works in TXVs. Simplifying installation & reducing leaks

[18:08] – Refrigerant Flow & Check Valves. The path of least Resistance Explained

This Episode is Kindly Sponsored by:

Master: https://www.master.ca/

Cintas: https://www.cintas.com/

Supply House: https://www.supplyhouse.com/

Cool Air Products: https://www.coolairproducts.net/

Lambert Insurance Services: https://www.lambert-ins.com/ 

Follow the Guest Jamie Kitchen on:

LinkedIn: https://www.linkedin.com/in/jamie-kitchen/ Danfoss: https://www.linkedin.com/company/danfoss/

Follow the Host:

LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/

Website: https://www.hvacknowitall.com

Facebook: https://www.facebook.com/people/HVAC-Know-It-All-2/61569643061429/ 

Instagram: https://www.instagram.com/hvacknowitall1/