Goodman · Air conditioner

CoreSense 2 Pressure trip - yellow 2 flashes (red 2 = lockout)

High severity Goodman/Amana R-32 GLXS/ALXSGoodman/Amana R-410A GSX/ASX/DSX (ANX/SSX/VSX)

What the control is telling you

Compressor ran 12 s to 15 min, then tripped for longer than 7 min (discharge pressure too high or overload). Red 2 flashes with yellow off = locked out after 4 trips in a row or 10 total.

Applies to: Copeland CoreSense 3-wire module: Amana/Deluxe R-410A ASX, ASZ, DSX, DSZ units and Amana R-32 ALXS / ALZS units

Likely causes

Outdoor fan not running (capacitor, wiring, motor)
High head pressure: high pressure switch, overcharge, non-condensables
Dirty, blocked or damaged outdoor coil

Test and repair steps

Warning: Kill power to the outdoor unit before touching wiring, the compressor terminals or the control.
Check outdoor fan capacitor, wiring and motor.
Clean the outdoor coil.
Check charge for overcharge and for non-condensables; check the high pressure switch.
After the repair, reset the module lockout (cycle power / reset button) and verify.

Models that show this code

150 models in Goodman/Amana R-32 GLXS/ALXS, Goodman/Amana R-410A GSX/ASX/DSX (ANX/SSX/VSX)

ALXS3BN**10AAALXS4BA**10AAALXS4NA**10AAALXS5BA**10AAANX130181ANX130241ANX130301ANX130361ANX130421ANX130481ANX130601ANX130611ANX140181ANX140191ANX140241ANX140251ANX140301ANX140361ANX140371ANX140421ANX140431ANX140481ANX140601ASX130181ASX130241ASX130301ASX130361ASX130421ASX130481ASX130601ASX130611ASX140181ASX140191ASX140241ASX140251ASX140301ASX140311ASX140361ASX140371ASX140421ASX140431ASX140481ASX140601ASX160181ASX160241ASX160301ASX160311ASX160361ASX160371ASX160421ASX160481ASX160601ASX160611ASX180**1ABASXH5***10DSX160241DSX160361GLXS3BN**10AAGLXS4BA**10AAGLXS4MA**10AA

Other codes on the same units

Comfort Alert 9 Yellow ALERT 9 flashes - low control voltage
Comfort Alert TRIP Red TRIP LED - call present but compressor not running
Comfort Alert TRIP+ALERT TRIP and ALERT LEDs flashing together - control voltage too low
CoreSense 1 Yellow 1 flash - long run time (low side)
CoreSense 3 Short cycling / pressure switch cycling - yellow 3 (red 3 = lockout)
CoreSense 4 Locked rotor - yellow 4 (red 4 = lockout)
CoreSense 5 Moderate run trip - yellow 5 (red 5 = lockout)
CoreSense 9 Red 9 flashes - PROT output overcurrent

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Source: Goodman RS6200301 R-32 GLXS/ALXS/GLZS/ALZS service (07-2024), CoreSense Diagnostics Table p.21-22 and Quick Reference Table p.23; Goodman RS6200006r103 R-410A ASX/GSX/DSX/ASZ/GSZ/DSZ service (text export) (Goodman_R_410A_ASX_GSX_DSX_A_C_and_ASZ_GSZ_DSZ_HP_covers_GSX_GSZ_lines_GSXH5_GSZH5_service.txt section Diagnostics Table: Coresense Module / Table 1 Quick Reference). Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.