All Switch/Dial Operation Does Not Respond (Auto A/C) (Us): Notes

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

ALL SWITCH/DIAL OPERATION DOES NOT RESPOND (AUTO A/C) (US) DESCRIPTION AND POSSIBLE CAUSE

Troubleshooting item	All switch/dial operation does not respond
Description	All switch/dial operation of climate control unit does not respond Indicator light of climate control unit does not turn on
Possible cause	Open circuit in climate control unit power supply circuit Short to ground in climate control unit power supply circuit Open circuit in climate control unit ground circuit Open circuit in dash-electrical supply unit power supply circuit Short to ground in dash-electrical supply unit power supply circuit Open circuit in dash-electrical supply unit ground circuit Ground point floating, bad contact Climate control unit malfunction
Courtesy of MAZDA MOTORS CORP.

When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, inspect make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.