Carrier Carrier 58STA/STX 80,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace MECH-BLOWER Error Fix: Blower Motor Failure — No Airflow from Vents

Error code MECH-BLOWER on the Carrier Carrier 58STA/STX 80,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace means: Blower Motor Failure — No Airflow from Vents. The furnace ignites and heats normally, but little or no air comes from the vents, or the blower runs intermittently. Carrier furnaces use either PSC (permanent split capacitor) or ECM (electronically commutated motor / variable-speed) blower motors. PSC motors are simpler and cheaper but less efficient. ECM motors are more efficient and quieter but have an electronic control module that can fail separately from the motor itself. Symptoms: no blower operation (furnace overheats and trips high-limit — 4 blinks), blower hums but doesn't spin (seized bearings or failed capacitor on PSC motors), blower runs at wrong speed, or blower starts then stops. For PSC motors, check the run capacitor first — a weak/failed capacitor is cheaper to replace than the whole motor ($15-$30 vs. $200-$400). For ECM motors, the control module is often the failure point — replacement costs $500-$1,200. Some ECM modules can be replaced separately from the motor.

The most successful fix is "Replace ECM Blower Motor Control Module" (hard difficulty, ~90 minutes). Estimated DIY cost: $500-$1200. HomeMD has 2 community-ranked fixes for this error.

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Yes — the top-ranked community fix ("Replace ECM Blower Motor Control Module") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Labeling tape, Camera or smartphone.

DIY cost: $500-$1200. Professional repair typically costs $700-$1500. Many homeowners save money by trying the top-ranked community fix first.

The Carrier Carrier 58STA/STX 80,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace has 8 other known error codes, including: BLINK-1 (LED 1 Blink — System Lockout (Retries Exceeded)), BLINK-2 (LED 2 Blinks — Pressure Switch Stuck Closed), BLINK-3 (LED 3 Blinks — Pressure Switch Did Not Close (Draft Safeguard)), BLINK-4 (LED 4 Blinks — Open High-Limit Switch (Overheating)), BLINK-5 (LED 5 Blinks — Flame Sensed Without Gas Valve Call (Dangerous)), and 3 more.

Error code MECH-BLOWER also appears on 5 other Carrier models: 58STA090-1-16 90,000 BTU 80% AFUE Single-Stage Gas Furnace, Carrier 58SB0 Comfort 80 Single-Stage 80% AFUE Gas Furnace, Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence, Carrier 59TN6 Infinity 96 Two-Stage 96% AFUE Gas Furnace with Variable-Speed Blower, Carrier 59TP6A080E17 80,000 BTU 96% AFUE Two-Stage Gas Furnace with Variable-Speed Blower. The fix may vary by model, so check each model's specific page for tailored repair steps.