DD15 2017 Western Star 5700xe RPM Rising Idle

- First post -

Can anyone help diagnose the following problem that occurred …

I have a 2017 Western Star 5700xe with a DD15 - I had to park in San Antonio, TX for the weekend until my appointment on Monday. I have a generator and portable AC unit that I run to stay cool so I don’t normally idle my truck prolonged periods of time. I turn the truck on occasionally just to let it run a for a short period (15 min or so).
Friday and Saturday I had no issue however, Sunday when I had the truck running on idle, I had it up to approx 700-800 RPM suddenly I noticed it slowly started to climb to 1200 RPM. I turned it off, ran the truck again and it did it again. Both times, after 5 minutes of idle it starts to rise.
Anyone know whats wrong ???

 

Also if this is just the trucks auto elevate system - whats the appropriate amount of time to let it run ?

 

Would it regen even though I haven't had it running long … I would say throughout the weekend the total run time would be 2 hours.

 

I let it regen and it finished in about 15 minutes. I was just confused because the regen light didnt turn on until 10 minutes in so I was worried it could of been another issue.

Thank you for your help.