Trane HVAC Error Code 22: How to Fix Inverter Board Over Temperature

Error Code

22

Brand

Trane

Product Type

hvac

Severity

Medium

DIY Difficulty

Hard

Estimated Fix Time

1-2 hours

Tools You'll Need

• Phillips screwdriver
• Multimeter
• Vacuum with brush attachment
• Trane service manual (for specifications)

How to Fix Error Code 22

1. Power Down the System

   Always turn off power before working on HVAC equipment to avoid electric shock.

2. Locate the Inverter Board and Fan

3. Check for Airflow Obstructions

   Do not use water or liquid cleaners near electrical components.

4. Test the Cooling Fan

   Use caution with live voltage testing. If unsure, call a professional.

5. Check Inverter Board Temperature Sensor

   Disconnect power before handling the inverter board.

6. Replace Inverter Board if Needed

   Only attempt board replacement if you have experience with HVAC electronics. Incorrect installation can cause further damage.

7. Restore Power and Test

Parts You May Need