The short answer
The basic single-stage Goodman heat pumps and air conditioners in Northern Virginia, like the GSZ14 and GSX14, don’t show error codes at all. Goodman’s manual for them has a symptom chart, not a code list. Codes show up on two-stage outdoor units (L1, L2, A3), inverter units (E13, E15, E51), communicating air handlers (E0F, Eb9) and R-32 leak sensors (a red light). Most point at refrigerant pressure, a full drain pan, weak airflow or wiring. A repair visit starts with our $99 diagnostic.
Which Goodman units show codes
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| Your unit | What it shows | Goodman’s manual |
|---|---|---|
| Basic single-stage (GSX14, GSZ14 and similar) | No codes. Go by what it’s doing | GSZ14 |
| Two-stage ComfortBridge (GSXC, GSZC and the Amana ASXC, ASZC) | Two characters on the outdoor board | Service manual, GSZC16/18 |
| Older two-stage with Comfort Alert | A flashing yellow light | Service manual |
| Inverter (AVXC20, GVXC20, GSZV9) | E codes on the board and in the CoolCloud app | AVXC20, GSZV9 |
| Communicating air handler | Its own display indoors | Service manual |
| R-32 leak sensor | A red light | Sensor kit |
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Two-stage ComfortBridge codes
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| Code | What it means | Where a tech looks |
|---|---|---|
| 01 | Low pressure trip. Clears itself after 30 normal cycles | The charge, a leak, the indoor blower and filter |
| L1 | Locked out after 3 low pressure trips | Same as 01 |
| 02 | High pressure trip. Clears after 4 normal cycles | A dirty outdoor coil, the outdoor fan |
| L2 | Locked out after 3 high pressure trips | Same as 02 |
| 03 | Short cycling: the last 4 cycles ran under 3 minutes | The thermostat and its wiring |
| 04 | Locked rotor: the compressor can’t turn | The capacitor, the compressor |
| 05, 06, 07, L6, L7 | An open circuit to the compressor or its start or run circuit | Wiring, the capacitor, the compressor |
| A2, A3 | Outdoor air (A2) or coil (A3) sensor. With A3 a heat pump won’t heat | The sensor or its wiring |
| E5 | Open fuse on the board | A short in the thermostat wiring |
On older boards with Comfort Alert, the yellow light flashes 1 time for a low pressure trip, 2 for high pressure, 3 for short cycling, and the red light comes on with it when it locks out. To read the last six faults, a tech holds RECALL for 2 to 5 seconds. Holding it longer erases them, so write the code down first.
Inverter codes (AVXC20, GVXC20, GSZV9)
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| Code | What it means | Goodman’s causes |
|---|---|---|
| E13 | High pressure, critical | A blocked outdoor coil, a service valve not fully open, too much refrigerant, the outdoor fan not running |
| E15 | Low pressure, critical | A closed service valve, a restriction, low charge or a leak, the indoor fan |
| E17 | Repeated compressor faults | A service valve not open, a lost phase, the compressor motor |
| E19 | Outdoor fan problem | Something blocking the fan, its connection, the motor |
| E32 | Control board too hot | Cycle the power and try again in a usable outdoor temperature |
| E41 | Low refrigerant | Means a leak: refrigerant doesn’t get used up |
| E51 | Lost communication with the outdoor unit | Check the communication wiring and repair it |
The last six faults show on the board and in the CoolCloud phone app. A dash instead of a code is a minor fault Goodman lets the unit run through.
Indoor air handler codes
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| Code | What it means | First check |
|---|---|---|
| E0F | The condensate switch opened: water backing up in the drain pan | The pan, the trap and the drain line |
| Eb9 | Airflow lower than the system asked for | The filter, closed registers, the ductwork |
| Eb0 | The blower isn’t running when it should | Motor wiring or a failed motor |
| EC1 | No communication with the outdoor unit | The low voltage wiring between the units |
| Ed0, Ed1, Ed4 | The data set is missing or wrong | Reloading it with Goodman’s Bluetooth loader |
From the troubleshooting table in Goodman’s ComfortNet service manual. DFT on the display only means the heat pump is in defrost or calling for backup heat. That one isn’t a fault.
The red light on an R-32 leak sensor
Goodman’s newer R-32 systems carry a refrigerant leak sensor. On the kit that pairs one with a furnace, a slow flash is normal. A fast flash means it detected R-32: heating and cooling stop and the blower keeps running. Solid on means it cleared and is waiting 5 more minutes. 2, 3 or 4 flashes is a fault in the sensor or its board.
Goodman’s instruction for a leak alarm: don’t open the unit and don’t turn it off. Leave it running, open a window, and call. Our R-454B guide covers the new refrigerants.
What you’ll notice first
- Cool air from the vents in heat mode. See cold air in winter.
- Ice on the outdoor unit that doesn’t melt off. Light frost that clears is normal defrost. See heat pump covered in ice.
- Aux heat running all the time. See aux heat vs emergency heat.
- Water around the indoor unit, or E0F on its display.
- The outdoor unit humming with the fan still, or clicking on and off.
What causes it, and what it costs
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| Cause | Codes it can throw | What fixing it costs |
|---|---|---|
| A clogged condensate drain | E0F | $175 to $420 |
| A failed capacitor | 04, 06, 07, or none on a basic unit | $240 to $370 |
| A burned contactor | 05, or none on a basic unit | $290 to $425 |
| Low refrigerant from a leak | 01, L1, E15, E41 | Finding and fixing the leak: $1,850 to $2,700. From about $31 a month at 0% APR for 60 months, the whole price financed, on approved credit. Topping up alone: $190 to $740 |
| The outdoor fan motor | E19, 02, E13 | $1,100 to $1,500 |
| A failed defrost board | None on a basic heat pump: ice that won’t clear | $450 to $1,150 |
| A dirty blower wheel | Eb9 | $300 to $440 |
| A failed blower motor | Eb0 | $670 to $2,400 |
| A failed compressor | 04, L6, L7, E17 | With the parts warranty: $1,900 to $2,500. From about $32 a month at 0% APR for 60 months, the whole price financed, on approved credit. Without it: $2,200 to $5,100. From about $37 a month at 0% APR for 60 months, the whole price financed, on approved credit. |
What you can check yourself
Goodman writes its manuals for trained technicians, so a homeowner’s line is the filter, the thermostat and the outside of the unit.
- Change the filter. A clogged one is behind a lot of airflow codes. Our filter guide has the right one.
- Check the thermostat is on Heat or Cool, and check the breakers and the outdoor disconnect box.
- Clear leaves and snow from around the outdoor unit.
- Don’t chip the ice off. It bends the fins and can puncture a line.
- Write the code down before anyone cuts the power. Goodman’s reset for L1 or L2 is cycling power to the control. Do it once. If it locks out again, the cause is still there.
What a tech does on the visit
The tech reads the stored faults first, so a code that cleared overnight still counts. Then gauges on the refrigerant, a meter on the capacitor and contactor, and a look at the coils, the fan and the drain. Low on refrigerant means finding the leak, not only topping it up. If the compressor has failed on an older system, you also get the price for a new heat pump in writing: $8,499 to $21,650. From about $142 a month at 0% APR for 60 months, the whole price financed, on approved credit.
We fix Goodman and Amana heat pumps and air conditioners across Northern Virginia, in Ashburn, Leesburg, Sterling, Herndon, Chantilly, Fairfax, Arlington and Manassas. Our heat pump repair and AC repair pages have the prices. Our heating check is $67 per system through December 31, for a furnace, heat pump or boiler. For a furnace code, start with our Goodman furnace codes chart.
Other Goodman codes, one at a time: pressure switch: 3 flashes or EE2; limit switch: 4 flashes or EE3; lockout and weak flame: 1 flash, EE0, EE6; solid red light, no light or rapid flashing; rollout switch: 6 flashes or E11.
Get it fixed
Call (703) 997-9757 and we’ll get a tech out to look at your Goodman heat pump or AC. We answer day or night. Rather book online? Pick a time here and a box of warm cookies comes with the visit. A repair visit starts with our $99 diagnostic, and you get the price in writing before any work starts. Already have a quote? We’ll give you a free second opinion. Rated 5.0 stars across 1,138 reviews on Google, Angi, Yelp, the BBB and Facebook, Virginia Class A license 2705192276.
Questions people ask
Does a Goodman heat pump have error codes?
The basic single-stage ones, like the GSZ14, don’t. Two-stage ComfortBridge and inverter models show codes on the outdoor board, and communicating air handlers show their own indoors.
What does L1 or L2 mean on a Goodman?
On a two-stage outdoor unit, L1 is a lockout after three low pressure trips and L2 after three high pressure trips. Cycling power resets it, but if it comes back, the cause is still there.
What does E0F mean on a Goodman air handler?
Water is backing up in the drain pan and the condensate switch opened. Clearing a clogged drain is $175 to $420.
What does Eb9 mean on a Goodman?
Airflow is lower than the system asked for. Change the filter and open any closed vents first.
Why is the red light flashing fast on my Goodman R-32 sensor?
It’s a refrigerant leak alarm. Heating and cooling stop and the blower runs. Goodman says not to open the unit or turn it off. Leave it running and call.
