Code 26-27 PCM Reprogramming Failure - Automatic reprogramming attempt failed.

What does 26-27 mean?

This code signifies that an attempt for the PCM (Processor Control Module) to reprogram itself was unsuccessful. If this message is not recent, a subsequent reprogramming attempt might have succeeded automatically.

• Failed automatic software reprogramming of the PCM.
• Outdated PCM software requiring manual update.

Click steps to track your progress.

1. 1

   Check the current PCM software version using your Infinity Control thermostat or the Carrier Service Tech App.

2. 2

   Compare your current software version with the latest available software release for your unit.

3. 3

   If the PCM software is not the most current, attempt to reprogram the PCM manually using the Infinity Control or the Carrier Service Tech App.

4. 4

   If reprogramming fails repeatedly, contact a qualified service technician.