410a retrofit, do you txv any piping?

[beenthere]

How do you know your hitting all tubes, and not missing a circuit?

In order to "miss" a circuit. That circuit would have to be restricted. Which would show on start up. And mean they would need to get a new coil then.

You don't need to get every drop of min oil out of the system.

[Saturatedpsi]

I've put 410A condensers on oils that had been R22 systems. blow them out like I do the line set, put on a R410A TXV, vac and check charge like normal.

Does anyone know for sure, whether or not the mfg(s) would honor a compressor (or any other refrigerant system component) warranty with the 410A/22 mismatch? Or dealt with that situation?

[beenthere]

Most coils made the last several years have been R410A/R22 coils. So there is no mismatch on many of them.

Haven't had a compressor go out that is on a coil that was used for R22. So never had to file a warranty claim.

[wolfstrike]

Does anyone know for sure, whether or not the mfg(s) would honor a compressor (or any other refrigerant system component) warranty with the 410A/22 mismatch? Or dealt with that situation?

Rheem dealer told me "everyone is doing it, but we don't want the responsibilty"