Thermistor Converter
Meter on the sensor, resistance in, temperature out. Compare it with the real temperature at the sensor and you know in ten seconds whether it's lying.
Which sensor?
What does the meter say?
At 20 °C this sensor should read about 6.3 kΩ.
Sensor cleared — or condemned?
Either way, the reading is one piece of a diagnosis. The full workspace puts it next to pressures, superheat and this model's own expected values.
Try the full diagnosis — free demo →Measure with the sensor DISCONNECTED from the board — in circuit, the controller's own electronics sit in parallel and lie to your meter. The Mitsubishi curves are the manufacturer's published constants; the generic curves are the industry standards most other sensors follow. A make we haven't verified doesn't get a curve with its name on it.