Generac In Line troubleshooting: 15 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Generac In Line — full specs, parts & maintenance.
| Code | Meaning |
|---|---|
| Safety 001 | Not stated |
| Symptom | Cause | Remedy |
|---|---|---|
| Engine won’t crank. | 1. 15 amp fuse blown. 2. Loose or corroded or defective battery cables. 3. Defective starter contactor. 4. Defective starter motor. 5. Dead or Defective Battery. 6. 5 amp fuse blown. | 1. Replace fuse. 2. Tighten, clean or replace battery cables as necessary. 3. Replace contactor.* 4. Replace starter motor.* 5. Remove, change or replace battery. 6. Replace fuse.* |
| Engine cranks but won't start | 1. Out of fuel. 2. Fuel solenoid (FS) is defective 3. Open Wire #14A from Engine Control circuit board. 4. Spark plugs defective. 5. Door on tank not closed. | 1. Replenish fuel. 2. Replace solenoid.* 3. Reconnect wire. 4. Clean, regap or replace plugs. 5. Close door on tank. |
| Engine starts hard, runs rough. | 1. Flame arrestor (air cleaner) plugged or damaged. 2. Plugged fuel line. 3. Defective spark plugs. 4. Fuel pressure incorrect. | 1. Clean or replace as needed. 2. Unclog fuel line. 3. Clean, regap or replace plugs. 4. Confirm fuel pressure to regulator is as recommended in SPECIFICATIONS. |
| Engine oil level is low. | Check oil and add oil as needed. | |
| Engine is overheated. | Check cooling system for leaks. | |
| Defective Low Oil Pressure Switch | Replace switch.* | |
| Defective Coolant Temperature Switch | Replace switch.* | |
| Defective Control Module circuit board | Replace board.* | |
| Coolant Level is Low. | Repair leak - Add coolant. | |
| Defective AUTO/OFF/MANUAL switch | Replace switch.* | |
| Open/disconnected wire #15A between AUTO/OFF/MANUAL switch and Control Module circuit board. | Reconnect/close wire. | |
| Engine starts then shuts down. | Defective Control Module circuit board *Contact the nearest Authorized Dealer for assistance. | |
| AUTO/OFF/MANUAL Switch at OFF, engine continues to run | 1. Check main line circuit breaker. 2. Check circuit breaker & fuses. 3. Transfer switch set to NORMAL position 4. Generator internal failure. 5. Thermal circuit breaker open. | |
| No AC output from generator. | 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. Auto-reset - Wait 5 min. and attempt restart. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: 1. 15 amp fuse blown. 2. Loose or corroded or defective battery cables. 3. Defective starter contactor. 4. Defective starter motor. 5. Dead or Defective Battery. 6. 5 amp fuse blown.. See the table for the matching fixes.
Documented causes: 1. Out of fuel. 2. Fuel solenoid (FS) is defective 3. Open Wire #14A from Engine Control circuit board. 4. Spark plugs defective. 5. Door on tank not closed.. See the table for the matching fixes.
Documented causes: 1. Flame arrestor (air cleaner) plugged or damaged. 2. Plugged fuel line. 3. Defective spark plugs. 4. Fuel pressure incorrect.. See the table for the matching fixes.