Icon
Reliable Heating and Cooling Solutions – Quality Service, Fair Prices, Guaranteed Satisfaction!

Follow Us On:

Logo
Contact US!

Goodman ANX130421 Error Codes

Updated · by Aurora Star Tech Inc.

Goodman ANX130421 error codes and diagnostic codes (also listed as ANX130421AG, ANX130421AH). The ANX130421 is a Goodman air conditioner in the Goodman/Amana R-410A GSX/ASX/DSX (ANX/SSX/VSX) series.

Homeowner with a air conditioner problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Goodman ANX130421 error codes list

CodeMeaningSeverity
Comfort Alert 1Yellow ALERT 1 flash - long run timeMedium
Comfort Alert 2Yellow ALERT 2 flashes - system pressure tripHigh
Comfort Alert 3Yellow ALERT 3 flashes - short cyclingMedium
Comfort Alert 4Yellow ALERT 4 flashes - locked rotorCritical
Comfort Alert 5Yellow ALERT 5 flashes - open circuitHigh
Comfort Alert 6Yellow ALERT 6 flashes - open start circuitCritical
Comfort Alert 7Yellow ALERT 7 flashes - open run circuitCritical
Comfort Alert 9Yellow ALERT 9 flashes - low control voltageMedium
Comfort Alert TRIPRed TRIP LED - call present but compressor not runningHigh
Comfort Alert TRIP+ALERTTRIP and ALERT LEDs flashing together - control voltage too lowMedium
CoreSense 1Yellow 1 flash - long run time (low side)Medium
CoreSense 2Pressure trip - yellow 2 flashes (red 2 = lockout)High
CoreSense 3Short cycling / pressure switch cycling - yellow 3 (red 3 = lockout)Medium
CoreSense 4Locked rotor - yellow 4 (red 4 = lockout)Critical
CoreSense 5Moderate run trip - yellow 5 (red 5 = lockout)High
CoreSense 9Red 9 flashes - PROT output overcurrentHigh
CoreSense solid redSolid red TRIP - call present but compressor not runningHigh

Troubleshooting the ANX130421

All Goodman Air Conditioner error codes →

Homeowner help: AC Running But Not Cooling: What to Check

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

© 2026 Aurora Star Tech Inc. All rights reserved. This page may not be copied, republished or used to train other systems without written permission.

Emergency HVAC Service

647-657-2977