Fan switch

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Remove the climate control unit.
Inspect for continuity between the fan switch terminals using an ohmmeter.
- If not as specified, replace the fan switch.
  
  Fig 1: Fan Switch Continuity Chart
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 2: Circuit Diagram Fan Switch
  Courtesy of MAZDA MOTORS CORP.