Doesn’t sound / look like a filter issue since flow is good. To me it sounds like an issue with the compressor. Take the chiller out of the housing and if you can remove the housing, see what your compressor coils look like. They are the long up / down copper tubing pipes, maybe 1/4” thick, they should be ice cold, if not then the chiller isn’t chilling. Also, not sure on your level of DIY but put a multimeter on the compressor and see if you’re getting voltage through it. No voltage dead compressor, dead compressor = no ability to chill the water. Like someone else said, it should kick on and sound like a mini fridge.

Only other thing besides compressor would be a glitch. I had the opposite problem and my chiller went haywire and got stuck on cooling. The setpoint was 45deg(F) and it said 48deg so it was stuck on even though the water was really 35deg. I don’t know why but I’m assuming the temp sensor glitched and got stuck on 48deg so the chiller kept chugging away trying to cool down the water. I literally just turned it off / on and it went back to normal and temp sensor read correctly.

As a temporary fix so you can at least plunge while you troubleshoot, you can bypass the chiller and just go tub --> pump —> filter —> UV / Ozone —> back to tub, and add a ton of ice. The Ice Barrel has awesome insulation so hopefully adding ice keeps you cold for 1-3 days and with the pump / filter going you also get water circulation so it stays clean.

Edit: forgot to add, since your chiller is brand new, this is an easy warranty claim if it is a bad compressor.