th-18 — Condenser subcooling liquid sensor fault, circuit A

What does th-18 mean?

The condenser subcooling liquid sensor for circuit A is faulty. The heat reclaim mode for this circuit will be stopped.

• Thermistor sensor is defective.
• Wiring to the sensor is damaged.
• Sensor connection is loose.

Click steps to track your progress.

1. 1

   Inspect the wiring and connection of the subcooling sensor.

2. 2

   Verify the sensor's readings or resistance.

3. 3

   Replace the sensor if it is defective.

4. 4

   Reset the alarm and check heat reclaim mode.