High side fault: four consecutive compressor protector trips with average run time between trips of more than 1 minute and less than 15 minutes, with the low and high pressure switches closed.
Homeowner part this code names: AC coil cleaner.
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Goodman 02, also shown as L2, is a high-side fault. The manual defines it as four consecutive compressor protector trips with an average run time of more than 1 minute and less than 15 minutes, while both pressure switches stay closed. The display reads 02 or L2. Causes are high pressure on the system, a dirty condenser coil or a failed outdoor fan motor, and a failed capacitor or a wiring fault. Every step is marked for a technician: check the high pressure switch and cycle power if it is open, replace the switch if pressure is not high, and if pressure is high, check and clean the condenser coil and check the outdoor fan, the capacitor, and the wiring. The published warning is that those repeated protector trips can damage the compressor. Code 02 is not the low-pressure cutout 01 / L1, and it does not list a thermostat-setting step.
Likely causes
- High pressure on the system
- Dirty condenser coil or failed outdoor fan motor
- Failed capacitor or wiring fault
Safe checks for 02 / L2
- Techniciancheck the resistance of the high pressure switch and cycle power if it is open; replace the switch if pressure is not high
- Technicianif pressure is high, check and clean the condenser coil, check the outdoor fan motor, the capacitor and the wiring, and repair or replace as needed
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician: the repeated compressor protector trips can damage the compressor.
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Parts & tools for this fix
Taken from this code's causes or steps. A search link opens Amazon results and does not confirm a fit. Check the model number in the manual.
AC and heat pump coil cleaning supplies: guide
In this code: Dirty condenser coil or failed outdoor fan motor
Run capacitor (furnace blower and AC): guide
In this code: Failed capacitor or wiring fault
This one is for a technician to test or replace, so we only explain it and do not link to buy it.
Multimeter for appliance and HVAC diagnosis: guide
Technician step in this code: check the resistance of the high pressure switch and cycle power if it is open; replace the switch if pressure is not high
This one is for a technician to test or replace, so we only explain it and do not link to buy it.
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