Readers: don't forget you need a "special" charger for a "special" battery - AGM.
Have an old Black & Decker that works great. Three types of battery served, Wet, Gel, AGM. Select your charging rate 2/10/25, tell it your battery type and go. Charges and then switches to "float" while indicating "FULL". Also has a starter capability and alternator diagnostic as well as battery reconditioning feature.
Purchased a new Noco 2amp last year to maintain my Beemer while away for a couple of months. Would have drained/killed the installed AGM (H8) battery with all the parasitic/passive devices constantly on while not driving for an extended time. Don't know why but had an error code on my return. Fortunately, battery was unharmed, but NOT fully charged until after applying the Black & Decker referenced above. Don't know why or when the Noco went into error mode, or for how long.
Would concur. So many things are prevented from working due to some error code or sensor. Getting way too complicated. Almost had to replace my five-year-old dishwasher. Had stopped working. I determined after some research, due to the upper rack was not correctly locating in the rear receptacle that distributes water for the middle sprayer as part of the upper rack. Apparently, it can detect this, (low water pressure?) and stops running after filling. Identified rails had become loose. Retorqued retaining bolts on the exterior to 5 Nm, and rack now aligns and all good.
A service call would have been $150 wasted. Replacement $500 plus. Pays big time to investigate and self-diagnose!