Repair guides

• Air conditioner repair, stage by stage: from the call to the hand-over
  The eight stages of an air conditioner repair: symptoms, safety, reading the code, narrowing down, measuring, repairing, test run, hand-over.
• How to read an air conditioner error code
  Where the code shows, why one code means different things for different brands and models, and what to do before looking it up.
• Communication error between indoor and outdoor unit: what to check, in which order
  Communication (transmission) error codes usually come from the connecting wire, the supply or a board. The checks from easy to hard.
• Checking an air conditioner temperature sensor (thermistor)
  How to check the room, coil or discharge sensor when the unit reports a sensor error: measure its resistance and compare with the exact model's table.
• Indoor or outdoor fan motor error: causes and checks
  When the unit reports a fan error: check the mechanics, connectors, supply and speed feedback before replacing the motor or the board.
• Pressure, low refrigerant and high discharge temperature errors: where to start
  Pressure and discharge-temperature protection codes: tell a low charge from a blockage or poor heat rejection before charging.