I am a bit late on this question, but just ended up in a rabbit hole of unanswered Kitchenaid questions
The self cleaning features only serves to keep manufacturers in steady sales of parts. Quite simply the oven can only take those temperatures a few times until they break. The heat burns out elements, damages fans, door locks and worst of all damages control boards which are not far enough from the heat source. You problem sounds like the walls of the oven have buckled in the heat so the racks no longer fit. Too late now, but you should have taken Kitchenaid to court, the oven was not fit for purpose under the description they used to sell it to you.
Never use the self cleaning feature as stated here
https://www.google.com/search?q=self-cleaning+oven+temperature
Never Ever use the self clean feature. We see damage here every couple of weeks. The worst was a burned control board on an oven that all parts were obsolete, so the self clean cost a thousand bucks!
Self-cleaning ovens bring the heat so you don't have to spend hours scrubbing. Traditional self-cleaning cycles heat the oven between 800°F and 900°F, helping turn soil and spills to a powdery ash you can then wipe away. They utilize only heat-no chemicals-and are built to withstand high temperatures. (Says Maytag who love selling elements, door locks and other parts),
General Appliance Servicehttps://www.generalappliancesvc.com > why-you-shou...
Jan 29, 2020 - A self-cleaning oven is a feature on many modern ovens that burns off cooking spills and splatters with an extremely high temperature (932 F° or ...
Self-cleaning oven
Wikipediahttps://en.wikipedia.org > wiki > Self-cleaning_oven
A self-cleaning or pyrolytic oven is an oven which uses high temperature (approximately 932 °F (500 °C)) to burn off leftovers from baking, without the use ...
Pyrolytic process ·
Alternative technologies ·
Catalytic cleaning
Self-Cleaning Oven: 6 Reasons to Stop Using Feature ...
FIX Appliances CAhttps://fixappliances.ca > 4-reasons-stop-using-self-cle...
A self-cleaning oven is a feature on many modern ovens that burns off cooking spills and splatters at an extremely high temperature (932 F° or 500 C°) to aid in ...
How Self-Cleaning Ovens Work ·
Major Parts Damage
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