CARRIER DIAGNOSTIC REFERENCE STATUS LED — TWO-STAGE VARIABLE-SPEED (58MVP / 58MVB / 58UVB) DOC CARRIER-41

Carrier furnace: Code 41 — Blower Motor Fault

Q: What does code 41 mean on a Carrier furnace?

Code 41 — Blower Motor Fault. On the two-stage variable-speed control, the blower failed to reach 250 RPM or failed to talk to the control within 30 seconds of being switched on (10 seconds during steady-state running). Official first checks, power off: a blower wheel rubbing the housing, a loose wheel on the motor shaft, and the wiring from the control to the motor. After that the flowchart is a voltmeter test at each plug that ends at the blower control module, the motor, or the furnace control.

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Professional repair

What does code 41 mean on a Carrier furnace? On the two-stage variable-speed control, the blower failed to reach 250 RPM or failed to talk to the control within 30 seconds of being switched on (10 seconds during steady-state running). Official first checks, power off: a blower wheel rubbing the housing, a loose wheel on the motor shaft, and the wiring from the control to the motor. After that the flowchart is a voltmeter test at each plug that ends at the blower control module, the motor, or the furnace control.

See what causes this code ↓ Get repair quotes near you

115 V, 12 V and 5 V checks at PL3, PL13 and PL14 are technician work. Ask them to check the wheel and wiring before they quote a motor. DIY part cost: $400–800 — a pro visit for this class of fault typically runs $150–350.

What causes it (in order of likelihood)

Blower wheel rubbing the housing or loose on the shaft (official first check) TECH
Open wire or bad terminal between the furnace control and the motor (power leads or the RED, GREEN, YELLOW and BLUE signal wires) TECH
Blower control module or ECM motor. The official flowchart replaces the module first and follows its instructions to decide whether the whole motor is needed TECH
Furnace control (end of the flowchart) TECH

Parts referenced by this code

ECM Blower Motor / Blower Control Module

$400–800 · Model-specific — match to your unit’s parts list; the official flowchart replaces the control module first

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Always match parts against your model's parts list — part numbers vary within a series.

Applies to

58MVP (Series 170/180) · 58MVB · 58UVB

Different Carrier generations use different code maps. If your series isn't listed, don't assume this meaning — check your blower-door label.

Verified against Carrier 58MVP/58MVB/58UVB Troubleshooting Guide (58-06T), p.8/26-27 — “BLOWER MOTOR FAULT – Indicates the blower failed to reach 250 RPM or the blower failed to communicate within the prescribed time limits. Thirty seconds after being turned ON or ten seconds during steady-state operation.”

Verified against Carrier 58MVB Service and Maintenance Instructions (58MVB-2SM), p.18 — “Turn power off and check the following items first before proceeding to the next step. - Rubbing blower wheel. - Loose blower wheel. - Wiring from furnace control to blower motor.”

Verified against Carrier 59MN7A Troubleshooting Guide (59MN7A-01T), p.9

Last verified 2026-09-05 · how we verify

Related Carrier fault codes

These codes use the same status led — two-stage variable-speed (58mvp / 58mvb / 58uvb) system.

Pattern	Meaning
	Code 32 — Low-Heat Pressure Switch Did Not Close or Reopened
	Code 42 — Inducer Motor Fault
	Code 25 — Model Selection or Setup Error
	Code 43 — Low-Heat Pressure Switch Open in High Heat

See all Carrier furnace fault codes →