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CODE-46

Carrier · Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence

Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence CODE-46 Error Fix: Infinity Code 46 — Low Line Voltage

The Infinity System Control displays "Code 46" indicating the supply voltage to the furnace or outdoor unit is below the acceptable operating range. Carrier Infinity equipment monitors incoming voltage and will fault if it drops too low to safely operate motors and controls. Low voltage can be caused by: an undersized electrical circuit, a long wire run from the electrical panel, a utility brownout, a failing transformer, or high-resistance connections in the wiring. During heat waves or cold snaps when neighborhood demand is high, utility voltage can sag. Verify the voltage at the equipment disconnect with a multimeter — it should be within 10% of 230V (for outdoor units) or 115V (for furnaces). If voltage is consistently low, contact your utility company or have an electrician evaluate the circuit. Persistent low voltage damages motors and compressors over time.

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error CODE-46 on the Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence means: Infinity Code 46 — Low Line Voltage. The top-ranked community fix is “Measure and Correct Low Voltage Supply Issues” (medium difficulty, ~45 min, DIY cost: $0-$10). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · furnace

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many furnace repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$300.

Other Carrier Models with Error CODE-46

Carrier 59TN6 Infinity 96 Two-Stage 96% AFUE Gas Furnace with Variable-Speed Blower

furnace · 2 fixes

Other Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence Error Codes

CODE-21

Infinity Code 21 — Gas Heating Lockout

2 fixes

CODE-22

Infinity Code 22 — Abnormal Flame-Proving Signal

2 fixes

CODE-23

Infinity Code 23 — Pressure Switch Fault

2 fixes

CODE-24

Infinity Code 24 — Secondary Voltage Fuse Blown

2 fixes

CODE-26

Infinity Code 26 — Line Voltage Limit Circuit Open

2 fixes

CODE-41

Infinity Code 41 — Blower Motor Fault

2 fixes

CODE-42

Infinity Code 42 — Inducer Motor Fault

2 fixes

CODE-43

Infinity Code 43 — Low Flame Signal / Dirty Flame Sensor

2 fixes

People Also Ask About Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence Error CODE-46

What does error code CODE-46 mean on a Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence?

Error code CODE-46 on the Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence means: Infinity Code 46 — Low Line Voltage. The Infinity System Control displays "Code 46" indicating the supply voltage to the furnace or outdoor unit is below the acceptable operating range. Carrier Infinity equipment monitors incoming voltage and will fault if it drops too low to safely operate motors and controls. Low voltage can be caused by: an undersized electrical circuit, a long wire run from the electrical panel, a utility brownout, a failing transformer, or high-resistance connections in the wiring. During heat waves or cold snaps when neighborhood demand is high, utility voltage can sag. Verify the voltage at the equipment disconnect with a multimeter — it should be within 10% of 230V (for outdoor units) or 115V (for furnaces). If voltage is consistently low, contact your utility company or have an electrician evaluate the circuit. Persistent low voltage damages motors and compressors over time.

How do I fix error code CODE-46 on my Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence?

The most successful fix is "Measure and Correct Low Voltage Supply Issues" (medium difficulty, ~45 minutes). Estimated DIY cost: $0-$10. HomeMD has 2 community-ranked fixes for this error.

Is error code CODE-46 on a Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence error CODE-46 myself?

Yes — the top-ranked community fix ("Measure and Correct Low Voltage Supply Issues") is rated medium difficulty and takes about 45 minutes. Tools needed: Multimeter, Wire strippers, Nut driver set.

How much does it cost to repair Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence error CODE-46?

DIY cost: $0-$10. Professional repair typically costs $150-$300. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence have?

The Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence has 8 other known error codes, including: CODE-21 (Infinity Code 21 — Gas Heating Lockout), CODE-22 (Infinity Code 22 — Abnormal Flame-Proving Signal), CODE-23 (Infinity Code 23 — Pressure Switch Fault), CODE-24 (Infinity Code 24 — Secondary Voltage Fuse Blown), CODE-26 (Infinity Code 26 — Line Voltage Limit Circuit Open), and 3 more.

Which other Carrier models have the CODE-46 error?

Error code CODE-46 also appears on 1 other Carrier model: Carrier 59TN6 Infinity 96 Two-Stage 96% AFUE Gas Furnace with Variable-Speed Blower. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence have?

The Carrier Carrier 59MN7 Infinity 98 Modulating 98.5% AFUE Gas Furnace with Greenspeed Intelligence has 8 other known error codes:

CODE-21 — Infinity Code 21 — Gas Heating Lockout (2 fixes)
CODE-22 — Infinity Code 22 — Abnormal Flame-Proving Signal (2 fixes)
CODE-23 — Infinity Code 23 — Pressure Switch Fault (2 fixes)
CODE-24 — Infinity Code 24 — Secondary Voltage Fuse Blown (2 fixes)
CODE-26 — Infinity Code 26 — Line Voltage Limit Circuit Open (2 fixes)
CODE-41 — Infinity Code 41 — Blower Motor Fault (2 fixes)
CODE-42 — Infinity Code 42 — Inducer Motor Fault (2 fixes)
CODE-43 — Infinity Code 43 — Low Flame Signal / Dirty Flame Sensor (2 fixes)

Which other Carrier models have the CODE-46 error?

Error code CODE-46 also appears on 1 other Carrier model:

Carrier 59TN6 Infinity 96 Two-Stage 96% AFUE Gas Furnace with Variable-Speed Blower (furnace) · 2 fixes

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