Press the front blower OFF button to turn off the front air climate control system. However, you can still operate the mode and air intake buttons as long as the ignition switch is in the ON position.
Kia Niro 2017 (DE HEV) Service Manual: Cruise Control Switch Repair procedures
Inspection
Measuring Resistance
1.
Disconnect the cruise control switch connector from the control switch.
2.
Measure resistance between terminals on the control switch when each
function switch is ON (switch is depressed).
...
Kia Niro 2017 (DE HEV) Service Manual: Roof Trim Assembly Components and components location
Component Location
1. Roof Trim Assembly
...