Product troubleshooting
Back to Airquest N96MSN1002120A**D
Airquest N96MSN1002120A**D troubleshooting and error codes
These codes are matched from manufacturer documentation to this model's series or control platform. Keep checks visible and safe; do not open electrical, refrigerant, gas, combustion, or sealed equipment compartments.
Source-backed code set
32 matched codes
| Code | Meaning | System area | Priority |
|---|---|---|---|
| 10.1 | L1 polarity fault | Line power / polarity | Urgent |
| 12.1 | W on at power up | Thermostat input / startup | Service |
| 13.1 | Limit lockout - switch open longer than 3 minutes in Main Limit circuit | Main limit circuit | Urgent |
| 14.1 | Ignition lockout - after 4 consecutive ignition tries | Ignition / flame proving | Urgent |
| 14.2 | Flame lost 3 times after 70s of heating | Flame sensing | Urgent |
| 14.3 | Lockout - 7 loss of flame events during a heat request | Flame sensing | Urgent |
| 21.1 | 24VAC sensed on gas valve when it should not be | Gas valve circuit | Urgent |
| 22.1 | False flame | Flame sensing | Urgent |
| 23.1 | Stuck closed Main pressure switch | Main pressure switch | Urgent |
| 23.2 | Stuck closed secondary pressure switch | Secondary pressure switch | Urgent |
| 24.1 | Fuse fault | Low-voltage control circuit | Urgent |
| 25.1 | No program info in micro, no heating operation | Furnace control programming | Urgent |
| 25.2 | Corrupted program file, reprogram control using service app or super plug | Furnace control programming | Urgent |
| 25.3 | Twinned units are not identical; program numbers do not match | Twinning / control programming | Urgent |
| 25.4 | Main program invalid, using backup program to operate | Furnace control programming | Service |
| 25.5 | Installer settings corrupted | Furnace control settings | Service |
| 25.6 | Wrong program for control used | Furnace control programming | Urgent |
| 25.7 | Non-condensing program detected in a condensing model | Furnace control programming | Urgent |
| 27.1 | Program in super plug is missing | Control programming accessory | Urgent |
| 27.2 | Program in super plug is not recognized or corrupted | Control programming accessory | Urgent |
| 27.3 | Super plug programming failed | Control programming accessory | Urgent |
| 31.2 | Open secondary pressure switch (HPS) | Secondary pressure switch | Urgent |
| 31.3 | Secondary pressure switch lockout - failed to close after three trials | Secondary pressure switch | Urgent |
| 32.1 | Open Main pressure switch (LPS) | Main pressure switch | Urgent |
| 33.1 | A switch has opened in the Main Limit circuit | Main limit circuit | Urgent |
| 34.1 | Ignition fault - during four consecutive ignition trials | Ignition / flame proving | Urgent |
| 34.2 | Flame loss before heating blower on delay | Flame sensing | Urgent |
| 34.3 | Flame loss after heating blower on delay | Flame sensing | Urgent |
| 45.1 | Control failure - flame circuit fault, memory mismatch or sequence error | Furnace control board | Urgent |
| 45.2 | Control failure - gas valve relay will not close | Furnace control board / gas valve relay | Urgent |
| 45.3 | Control failure - EEPROM memory issue | Furnace control board | Urgent |
| 46.1 | Momentary loss of power | Electrical supply | Notice |
No matching error codes found.