Do I Need to Change the TXV Valve When Switching from R-22 to R410A? - Ask the Expert Episode 275

Today's question comes from Amos.

"Hey Dan, do I need to change the TXV valve when switching the outdoor condenser from R-22 refrigerant to R410A?"

Yes, you are going to have to change out the TXV.

Why? Well, R410A works at a different temperature and a different pressure than R-22. If you don't change it then it's not going to boil off correctly. And when it doesn't boil off correctly, it means the refrigerant is going to return to the condenser mostly as a liquid rather than a saturated vapor. You don't want the liquid coming back. You want the vapor.

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