air conditioner relay switch

The air conditioning system has several relays. Suzuki don't make the relays themselves they are made by Nippon Denso or can be substituted by other relays that are application specific. The air conditioning system trys to protect itself from damage if the refrigerant charge is low it will not allow the compressor to switch on. It may be necessary to check that the system has an adequate charge and that the compressor clutch works, heater controls work ect before condemning relays or wiring. If it does come down to a failed relay, parts store can cross reference the number found on a failed relay to a Standard Brand, Bosch, or Delco brand relay.