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

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.

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

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 ?

We've had A2L here, R32 in split systems, for over 10 years in Aus and originally education was the issue. We were only told we had to upgrade all our equipment if you looked into it however many didn't and are still using their old equipment. Personally I've not seen any issues in the refrigerant side, the electronic side of the units however. 😵‍💫

I’ve noticed small differences, like needing to wait a little longer (30 minutes instead of 15) for A2L systems to run before confirming refrigerant charge. As far as issues go- only electrical components, like Rheem A2L sensors. Carrier has been pretty solid for us so far.

We installed an A2L system at a salon and found that the RDS was tripping, however, no leak. Turns out that some of the accelerants in the hair care products that they use are A2L. That was a tedious find

I have been seeing a problem with Trane 454B A2L sensor boards failing.

Have mainly noticed sensor failure as a common culprit. Both Goodman (R32) & American Standard / Trane (R454b). I find it somewhat humorous that Goodman’s troubleshooting chart literally tells you to replace both Board and Sensor as there is no way to distinguish if the failure is the sensor or the board. The only board failure I have come across has been for the American Standard cased evaporator coil due to condensate dripping from the suction line onto the board. The board location for this coil was not thought through from the engineering side as it is field mounted right below the line-set connection points… pay attention to your line-set insulation and condensate management 😎

Right, I've seen that a good bit, we try to let as many techs know what to look for and that it's an easy fix.

Definitely, I've seen that too, it also seems like the higher seer rated unit sometimes takes longer than that.