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Residential HVAC

What are the issues everyone is seeing with the A2L refrigerants and equipment? Now that we're more than…

Discussion · Sep 7, 2026

What are the issues everyone is seeing with the A2L refrigerants and equipment? Now that we're more than a year and a half in.

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Reply · Sep 7, 2026

Found that the Lennox board has dip switches to indicate whether it has 1 or 2 sensors. It will throw a code if it thinks you have it set incorrectly. Fun find on a new install. Easily preventable callback if you know to look for it.

Reply · Sep 8, 2026

I noticed shortened pipelines for pre-charge mindsets on mini splits. Most used to be about 50 feet now they’re only about 25. This is mostly with Fujitsu 32 and Bosch 454B

Reply · Sep 8, 2026

I work on A3L and A2L. I have seen some issues on evaporator coil micro leaks, with A3L. Are you guys having A2L equipment shortage ?