Goodman Air Conditioner Error Codes

28 error codes for Goodman air conditioner models. Each links to the full diagnostic procedure from the service manual.

CodeDescription

brBrown Out Protection engaged C1Indoor Coil is freezing up.C2Indoor Air Recirculation C3Indoor Coil is freezing up.C4Indoor Coil froze up.C5Outdoor Coil temperature too high for outdoor ambient temperature.C6Poor Unit Performance.C7Indoor Freezing Lockout (ICT EHEmergency Hydronic Engaged EoUn-Configured Service Board F1Indoor Ambient Thermistor reads outside the range -20°F to 200°F and the…F2Wireless Remote Thermostat failure.F3Indoor Ambient Thermistor reads outside the range -20°F to 200°F.F4Indoor Coil Thermistor either above or below operating tolerances.F5Wireless Thermostat failure.F6Indoor Discharge Thermistor either above or below operating tolerances.FbLow Remote Battery Warning.FdFront Desk switch is closed; all outputs are switched off.FPFreeze Protection Engaged H1High Voltage Protection engaged

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Step-by-step tests with expected resistance, voltage, and continuity values
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M+ Max·Goodman Air Conditioner

br on my Goodman Air Conditioner

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Brown Out Protection engaged - power was lost

From Service Manual 285928, p.20:

1.Check for incoming power at correct voltage.

2.Measure line voltage at the power cord terminal block. Expected: 120 VAC (L1 to neutral) or 208 to 240 VAC between L1 and L2 under load.

3.Inspect the cord strain relief and terminal block screws for signs of arcing or heat discoloration. Loose connections here mimic an intermittent power failure to the control board.

Part W10911048

Power cord assembly

HPHeat Sentinel L6Discharge Air Too Hot.LCOutdoor Coil Thermistor temperature high.LSLoad Shedding Engaged nPWindow Switch Lockout (LS & INN open)OnControl is configured to respond to a wired thermostat.oPOpen Door Lockout (DS1 & DS2 open; wireless)UrUn-Rented Status (EHH & INN or wireless).

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