Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump CODE-11 Error Fix: Infinity Code 11 — No Heat / Heating Call Not Satisfied

The Infinity System Control displays "Code 11" indicating the system is calling for heating but the thermostat set point has not been reached within the expected time. On heat pump systems like the 25VNA Greenspeed, heating is provided by the heat pump reversing valve cycling refrigerant in heating mode. If the heat pump cannot keep up with the heating demand (common in very cold weather below 25°F), auxiliary/emergency heat strips may be used to supplement. Code 11 may appear when: (1) The heat pump's heating capacity is insufficient for the outdoor temperature — this is normal for air-source heat pumps and auxiliary heat should activate. (2) The outdoor unit isn't running — check breaker and disconnect. (3) The reversing valve is stuck in cooling mode — the system blows cool air when heating is expected. (4) Low refrigerant charge reduces heating capacity. (5) Outdoor coil iced over and defrost cycle isn't working. Review other codes for specific faults. On Greenspeed systems, the variable-speed compressor maximizes heating capacity in cold weather.

Low severity2 fixes available✨ Free fix available

Quick Answer

Error CODE-11 on the Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump means: Infinity Code 11 — No Heat / Heating Call Not Satisfied. The top-ranked community fix is “Test and Replace the Heat Pump Reversing Valve Solenoid Coil” (hard difficulty, ~90 min, DIY cost: $0-$15). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · heat pump

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 heat pump 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: $250-$400.

Other Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump Error Codes

CODE-12

Infinity Code 12 — No Cooling / Call Not Satisfied

2 fixes

CODE-31

Infinity Code 31 — High-Pressure Protection

2 fixes

CODE-32

Infinity Code 32 — Low-Pressure Protection

2 fixes

CODE-33

Infinity Code 33 — Outdoor Coil Thermistor Open/Short

2 fixes

CODE-34

Infinity Code 34 — Indoor Coil Thermistor Issue

2 fixes

CODE-51

Infinity Code 51 — Over/Under Charge Protection

2 fixes

CODE-52

Infinity Code 52 — Outdoor Unit Lost Communication

2 fixes

CODE-53

Infinity Code 53 — Indoor Unit Lost Communication

2 fixes

People Also Ask About Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump Error CODE-11

What does error code CODE-11 mean on a Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump?

Error code CODE-11 on the Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump means: Infinity Code 11 — No Heat / Heating Call Not Satisfied. The Infinity System Control displays "Code 11" indicating the system is calling for heating but the thermostat set point has not been reached within the expected time. On heat pump systems like the 25VNA Greenspeed, heating is provided by the heat pump reversing valve cycling refrigerant in heating mode. If the heat pump cannot keep up with the heating demand (common in very cold weather below 25°F), auxiliary/emergency heat strips may be used to supplement. Code 11 may appear when: (1) The heat pump's heating capacity is insufficient for the outdoor temperature — this is normal for air-source heat pumps and auxiliary heat should activate. (2) The outdoor unit isn't running — check breaker and disconnect. (3) The reversing valve is stuck in cooling mode — the system blows cool air when heating is expected. (4) Low refrigerant charge reduces heating capacity. (5) Outdoor coil iced over and defrost cycle isn't working. Review other codes for specific faults. On Greenspeed systems, the variable-speed compressor maximizes heating capacity in cold weather.

How do I fix error code CODE-11 on my Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump?

The most successful fix is "Test and Replace the Heat Pump Reversing Valve Solenoid Coil" (hard difficulty, ~90 minutes). Estimated DIY cost: $0-$15. HomeMD has 2 community-ranked fixes for this error.

Is error code CODE-11 on a Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump serious?

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Can I fix Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump error CODE-11 myself?

Yes — the top-ranked community fix ("Test and Replace the Heat Pump Reversing Valve Solenoid Coil") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Needle-nose pliers.

How much does it cost to repair Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump error CODE-11?

DIY cost: $0-$15. Professional repair typically costs $250-$400. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump have?

The Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump has 8 other known error codes, including: CODE-12 (Infinity Code 12 — No Cooling / Call Not Satisfied), CODE-31 (Infinity Code 31 — High-Pressure Protection), CODE-32 (Infinity Code 32 — Low-Pressure Protection), CODE-33 (Infinity Code 33 — Outdoor Coil Thermistor Open/Short), CODE-34 (Infinity Code 34 — Indoor Coil Thermistor Issue), and 3 more.

What other error codes does the Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump have?

The Carrier Carrier 25VNA Infinity Greenspeed Variable-Speed Heat Pump has 8 other known error codes:

CODE-12 — Infinity Code 12 — No Cooling / Call Not Satisfied (2 fixes)
CODE-31 — Infinity Code 31 — High-Pressure Protection (2 fixes)
CODE-32 — Infinity Code 32 — Low-Pressure Protection (2 fixes)
CODE-33 — Infinity Code 33 — Outdoor Coil Thermistor Open/Short (2 fixes)
CODE-34 — Infinity Code 34 — Indoor Coil Thermistor Issue (2 fixes)
CODE-51 — Infinity Code 51 — Over/Under Charge Protection (2 fixes)
CODE-52 — Infinity Code 52 — Outdoor Unit Lost Communication (2 fixes)
CODE-53 — Infinity Code 53 — Indoor Unit Lost Communication (2 fixes)

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