Tractor won't regen

2018 kioti dk5510. Bought brand new and at 3567 hours now. About 500 hours ago I wasn't able to do a manual regen, which I only do very rarely because it runs the passive regen often enough. Now I'm starting to overheat after 40 minutes of continual use. It will not run a forced regen with the button and the passive regen isn't coming on for the last 150 hours. Methinks I am screwed. Please keep your environmentalist crap away from my small acreage tractor please. Looks like complete regen rebuild costs more than sending in my ecu for a tune and delete. Any suggestions?