Goodman AC & Heat Pump Error Code 05: Meaning & How to Fix It

By the ErrorCodePro Editorial Team · Last reviewed October 20, 2026

Goodman ac & heat pump error code 05 means: Open circuit: power is disconnected, the compressor protector has failed, or the compressor is not wired properly to the control. [1] Keep using it? Only if the code clears after the owner checks; if it returns, leave the system off and call an HVAC technician. Start with the owner checks below, beginning with: check breakers and the outdoor disconnect.

Source: Goodman GSXC7 installation instructions, unitary diagnostic codes, via Alpine Home Air (manual copy) [1].

Quick facts

Code	05
Also shown as	None listed by the manufacturer
Brand / appliance	Goodman ac & heat pump (gsxc7 variable-speed air conditioners (7-segment diagnostic display))
System	Power supply
Meaning (service chart)	Open circuit: power is disconnected, the compressor protector has failed, or the compressor is not wired properly to the control. [1]
Keep using it?	Only if the code clears after the owner checks; if it returns, leave the system off and call an HVAC technician
DIY-safe?	Owner checks only (listed below)
Support	Goodman dealer or Goodman customer support (goodmanmfg.com)
Source document	Goodman GSXC7 installation instructions, unitary diagnostic codes (via Alpine Home Air (manual copy))

On this page: Meaning · Steps · Parts · When to call a technician · Related codes · FAQ

What error code 05 means on a Goodman ac & heat pump

Open circuit: power is disconnected, the compressor protector has failed, or the compressor is not wired properly to the control. [1]

This is a power supply code. Codes and wording can vary by model, so check your owner's manual for your model number.

How to fix Goodman ac & heat pump error code 05 (safe owner checks)

Owner checks only: on heating, cooling and water-heating equipment, limit yourself to reading the code and checking the thermostat, breaker and service switch, air filter, condensate drain, that the gas supply valve is open (no disassembly) and that vent terminals are clear of snow or debris. Reset power only if your manual allows it.

Safety first: disconnect power before you remove any panel or reach into the sump or drum. Do not touch wiring, the control board or the motor. If you see water near electrical parts, stop and call a technician. These steps are based on the Goodman GSXC7 installation instructions, unitary diagnostic codes (via Alpine Home Air (manual copy)) [1], rewritten for clarity.

Check breakers and the outdoor disconnect. At the main panel, make sure the AC/heat pump breaker is fully on, and that the disconnect switch beside the outdoor unit is on. Do not open the unit's electrical panel.
Restart and watch. Restore power, set the thermostat back to cooling or heating and check whether code 05 returns. If it does, call an HVAC technician; the remaining causes need gauges, meters or refrigerant work.

Owner steps are general safe checks added by ErrorCodePro; the manual's own corrective actions are technician procedures and are listed under When to call a technician.

Parts that may be involved

Exact parts depend on your model number. This page lists part types only, never part numbers.

No specific part is implied by the manufacturer's guidance for this code.

When to call a technician

Breakers and disconnect are on but the code remains (wiring and compressor checks)
Gas valves, burners, igniters, flame sensors, venting/flue or CO concerns: licensed HVAC technician or plumber
Refrigerant work: EPA 608-certified technician only
Smell of gas: leave and call the gas utility or 911
Anything involving wiring, the control board, the motor or the water valve electrics
The appliance is under warranty: contact Goodman dealer or Goodman customer support (goodmanmfg.com) first

Frequently asked questions

What does error code 05 mean on a Goodman ac & heat pump?

The Goodman GSXC7 installation instructions, unitary diagnostic codes lists 05 as follows: Open circuit: power is disconnected, the compressor protector has failed, or the compressor is not wired properly to the control.

Is it safe to keep using the ac & heat pump with 05?

Only if the code clears after the owner checks; if it returns, leave the system off and call an HVAC technician.

Can I fix Goodman ac & heat pump error 05 myself?

Only with the owner checks on this page, starting with: check breakers and the outdoor disconnect. If it persists, call a technician or Goodman dealer or Goodman customer support (goodmanmfg.com).

Sources

Alpine Home Air (manual copy): Goodman GSXC7 installation instructions, unitary diagnostic codes (third-party copy of manufacturer service data)

Last reviewed: October 20, 2026. ErrorCodePro is not affiliated with Goodman.