Can any of you who upgraded give an update to the new controller? Is it worth it? Have you noticed an improvement in the burn rate?
I think the thermocouple couple is going out on mine and am looking at upgrading the controller too.
I upgraded my YS640 about 2 weeks ago, some background, my grill is from 2012.
To date I have the blanket (you need a blanket - saves pellets and runs well all year), new wheels, new diffuser, new burn grate, ceramic igniter (this is a must have), new smoked grates, new bucket, and now ACS controller.
The ACS is an early birthday gift since we are in stay at home mode, I bought it early - my model also required a new outside fan, fan diffuser, the short thermocouple, and optional probe kit (included). In short, the $400 ish kit.
Prepare yourself for some work, this took me a solid hour and a half. Watch the video first, then watch it again - seriously, this helps relieve any anxiety about what you will do. Lay out your tools, ratchets, drill (be careful using one as you can strip the machine screws if not careful), bring your patience!!!
Couple unique issues, getting the 8 year old seasoned screws out to release the hopper from the grill, moving the thermocouple by drilling new holes and installation. Couple of areas in the written instructions where I would have like a clear, what side does the washer face, areas - all in, instructions are impressive.
Once completed, I set the model in the ACS and could not connect to WiFi, a deep breath later, I had forgotten to connect the WiFi antenna. Doh! Once connected I was up and running, a quick test and started a Q. I had to order a step drill bit for the probe hole so did not finish that until a week later, with the fan I mentioned.
Sum it up, very doable, pick a nice day as I did and do not be rushed. Watch the video and read the instructions and you will knock it out and be proud of what you completed!
Let us know how you fair.