Ford is testing new software for its Police Interceptor Utility Vehicles that heats the vehicle's interior to 133 degrees for 15 minutes to kill COVID-19. Ideally, this happens when nobody is inside the car. The new disinfecting technique–not unlike a kitchen oven's "self cleaning" feature–is based on research conducted with the Ohio State University Department of Microbiology. From a Ford statement:
Once activated, the vehicle's powertrain and climate control systems work together automatically to elevate passenger compartment temperatures. The software warms up the engine to an elevated level, and both heat and fan settings operate on high. The software automatically monitors interior temperatures until the entire passenger compartment hits the optimal level, then that temperature is maintained for 15 minutes[…]
"Our studies with Ford Motor Company indicate that exposing coronaviruses to temperatures of 56 degrees Celsius, or 132.8 degrees Fahrenheit, for 15 minutes reduces the viral concentration by greater than 99 percent on interior surfaces and materials used inside Police Interceptor Utility vehicles," said Jeff Jahnes and Jesse Kwiek, laboratory supervisors at The Ohio State University department of microbiology.
Law enforcement will have multiple ways to monitor progress. Hazard lights and taillights will flash in a pre-set pattern to notify when the process has begun, then will change at the end to signal completion. The vehicle's instrument cluster will also indicate progress. A cool-down process brings the temperature down from its highest points.