Back to HVAC HeroManual Database

Carrier Weathermaker Error 15

Blower Motor Lockout

What it means

Blower RPM failed proving repeatedly and unit entered lockout.

Diagnostic Step 1

Inspect ECM module wiring and verify external static pressure is within nameplate limits.

⚠️ Always disconnect power before servicing.

Need the full wiring diagram?

Step 1 is just the start. HVAC Hero reads the full Carrier manual for you.

Free 7-day trial. No credit card required for demo.