So did this fix hold up and completely resolve your issue?
I am going to try this as ours just went out AGAIN 100 miles into a 280 mile drive today. Its 39 degrees outside and we have kids in the car. I told my wife, that's it - this [email protected]#ing 2015 QX60 is going in the trash and we are getting a new car. But I am hopeful this will fix it as I've never heard of this fix but have been to dealers and mechanics enough in the last 1.5 years with the same issue.