Code 14-94 Line Voltage Low — Incoming voltage is too low

What does 14-94 mean?

The system has detected that the incoming line voltage has dropped below 180V AC RMS at any time, or below 185V AC RMS for more than 5 seconds. The unit will not operate or will shut down to protect components. This fault clears when voltage rises above 187V.

• Incoming line voltage is genuinely low.
• Loose connections causing excessive voltage drop.
• PCM board or transformer replaced without line voltage recalibration (causing nuisance errors).

Click steps to track your progress.

1. 1

   Check for the fault clearing automatically when line voltage increases above 187V.

2. 2

   Ensure all line voltage connections at the terminal block are tight.

3. 3

   If connections are tight and voltage remains low, contact your local power utility.

4. 4

   If the PCM board or transformer was recently replaced, recalibrate line voltage using the service app (technician step).