That sounds about right, most cycling switches are set to shut off at ~25PSI. Some of them were adjustable, there's a small screw between the connectors on the switch if they are. If it were me, I'd try another can, slowly. I don't know what your ambient temps are but your low side should hold ~35 - 40 when running. Whe're already in the beginnings of summer here - right now my weather station shows 109*, ha ha.It would get up to about 50 on the low side and drop to 30 or so when the compressor came on