RV Generator Won't Start? Common Problems to Check Before Requesting Service
An onboard generator that will not start is a common RV problem, especially after a period of storage. Before submitting a service request, a few basic checks can help you describe the issue accurately so a provider can prepare.
Check the Fuel Supply
The most common cause of a generator that will not start is fuel-related. If the RV fuel tank is below a quarter, many generators are designed to stop running to prevent draining the main tank. Also, fuel that has sat for months can go stale, especially in South Florida heat.
- Confirm the RV fuel tank is at least a quarter full
- Consider how long the fuel has been sitting
- If you use a fuel stabilizer, note when it was last added
Check the Battery
Generators rely on the house or chassis battery to start. A weak or discharged battery is a frequent cause of no-crank or slow-crank conditions. If you hear a clicking sound but the generator does not turn over, the battery is a likely suspect.
Check the Oil Level
Many generators have a low-oil shutdown that prevents starting if the oil level is too low. Check the oil dipstick if accessible and note the level. Do not attempt to bypass any safety switches.
Check for Tripped Breakers
A tripped breaker on the generator or in the RV panel can prevent the generator from starting or producing power. If you are comfortable doing so, check whether any breakers related to the generator are tripped.
What to Include in Your Service Request
When you submit a request, include the following to help a provider prepare:
- Generator brand and model if known (Onan, etc.)
- Fuel type (gas, diesel, or LP)
- What happens when you try to start it (no crank, cranks slowly, starts then dies)
- How long it has been since the generator last ran
- Any steps you have already checked
Do Not Bypass Safety Devices
Never attempt to bypass oil pressure switches, fuel safety valves, or other safety devices. These exist to prevent damage and injury. If the generator shuts down on its own, describe the symptom and let a qualified provider diagnose it.