th-03 — Defrost fault, circuit A

What does th-03 mean?

A defrosting issue has been detected in circuit A. The circuit will shut down if the unit is in heating mode.

• Defrost heater malfunction.
• Defrost sensor failure.
• Incorrect defrost cycle timing.
• Refrigerant charge issue.

Click steps to track your progress.

1. 1

   Inspect defrost components for damage or wear.

2. 2

   Check defrost sensors and associated wiring.

3. 3

   Ensure defrost cycle is initiating and completing correctly.

4. 4

   If the problem persists, professional servicing is required.