Heater Cores
| Condition | Code | Procedure |
|---|---|---|
| Air flow restriction | A | Require repair or replacement |
| Attaching hardware broken | A | Require repair or replacement of hardware |
| Attaching hardware missing | C | Require replacement of hardware |
| Attaching hardware not functioning | A | Require repair or replacement of hardware |
| Bypassed | A | Require repair or replacement |
| Connection leaking | A | Require repair or replacement |
| Corroded | 1 | Suggest repair or replacement |
| Fins damaged, affecting performance | A | Require repair or replacement |
| Fins damaged, not affecting performance | 2 | Suggest repair or replacement |
| Internal restrictions, affecting performance | A | Require repair or replacement |
| Leaking | B | Require repair or replacement |
| Missing | C | Require replacement |