Code 58 — Greenspeed/Extreme Suction Thermistor Range Fault

What does 58 mean?

This fault specifically for Greenspeed/Extreme units indicates that the suction thermistor is reporting a temperature value outside its expected operating range. This could mean an inaccurate reading or a sensor malfunction.

• Faulty suction thermistor
• Damaged or loose wiring to the thermistor
• Thermistor disconnected or shorted
• Refrigerant system operating abnormally, causing extreme temperatures

Click steps to track your progress.

1. 1

   Turn off the power to the outdoor unit at the circuit breaker for at least 30 seconds.

2. 2

   Restore power and observe if the fault clears.

3. 3

   Ensure the outdoor unit is clear of any debris or obstructions.

4. 4

   If the range fault persists, contact a qualified HVAC technician for diagnosis and sensor replacement.