RV Generator Maintenance & Troubleshooting: Complete Guide
Keep your RV generator running reliably with this comprehensive maintenance and troubleshooting guide for Onan, Generac, and Cummins units.
Keep your RV generator running reliably with this comprehensive maintenance and troubleshooting guide for Onan, Generac, and Cummins units.
Hard starting often fuel pressure bleed-down from check valve or injector. Test by cycling key to build pressure. Use gauge for definitive diagnosis.
Surge Guard 40250-RVC and 40350-RVC are interchangeable. Buzzing usually means loose connections - tighten all terminals. If buzzing persists with tight connections, the relay may be failing and unit needs replacement.
Consistent 2-minute shutdown under load indicates fuel delivery cannot keep up with demand. Check fuel pump, bleed system, verify no restrictions. Also check if generator is undersized for AC load - may need soft start on AC unit.
Your Ford F53 460ci is stalling due to carbon buildup in the EGR valve disrupting idle air/fuel mixture. Clean the EGR valve and passages thoroughly, or consider an EGR delete with ECU tune for a permanent solution.
Furnace that lights for 5-10 seconds then shuts off is classic flame sensor failure. Clean the sensor with steel wool or emery cloth - do not use sandpaper. If cleaning fails, replace the sensor. Located near burner, single wire connection.
Underhood generators and idling work but check local idle regulations. Extended idling wastes fuel and causes engine wear. Solar, generators, or DC-DC chargers are better long-term solutions.
When your RV propane furnace clicks but won't light, it's usually caused by a dirty or failing igniter, blocked air intake, low propane pressure, or faulty control board. Most issues can be resolved by cleaning the igniter, checking propane supply, and ensuring proper airflow.
AquaHot cycling every 15 minutes at idle is not normal. Possible causes include heat loss through stuck zone valves, thermostat issues, or circulation pump running when it shouldnt. Check that all zone valves are closed and pumps are off when no heat is called for.
Tankless RV water heaters lose significant efficiency at high altitude - about 4% per 1,000 feet. Above 4,500 feet, expect reduced output and possible flame failure. Consider traditional tank heaters if you frequently camp in mountains.
Change plugs now at 30K - lower stuck plug risk than waiting. Use penetrating oil on warm engine, remove slowly. Apply anti-seize to new plugs. Have extractor kit as backup. Proper technique prevents most stuck plug problems.
Intermittent flame failure varying from seconds to minutes indicates marginal flame sensor signal or airflow issues. Clean flame sensor with steel wool until shiny. Check combustion air intake and exhaust routing. Gas pressure fluctuation also possible.
V10 hesitation often dirty throttle body, weak coil, or fuel pressure. Clean throttle body and MAF first. Check fuel pressure under load.
The 2007 3-valve V10 does not need EGR delete like earlier versions. Focus on regular maintenance: Motorcraft spark plugs, synthetic oil, and transmission fluid changes. Engine is reliable as-is.
Everything RV owners need to know about the Ford 6.8L Triton V10 engine including common problems and solutions.