Mazda 6 Service Manual: No.23 a/c does not work sufficiently

No.22 vibration concerns (engine)

No.24 a/c is always on or a/c compressor runs continuously

Other materials:

Mazda 6 Service Manual: Thermostat
THERMOSTAT REMOVAL/INSTALLATION 1. Remove the plug hole plate. 2. Disconnect the negative battery cable. 3. Drain the engine coolant. (See COOLING SYSTEM SERVICE WARNINGS.) 4. Remove the drive belt. (See DRIVE BELT REPLACEMENT.) 5. Remove the washer tank. 6. Remove the P/S oil pump. Note ...

Mazda 6 Service Manual: Clock spring inspection
1. Remove the clock spring. 2. Inspect for continuity between the clock spring terminals using an ohmmeter. If not as specified, replace the clock spring. Note When the vehicle-side connector of clock spring is disconnected, the terminals 1A,1B, 1C and 1D are shorted to prevent ...