Troubleshooting guide
Onan EC-AGS+ generator does not run A/C
The EC-AGS+ owner manual says a generator that does not run A/C can be tied to temperature setting, temperature-sensor battery voltage, Bluetooth range, quiet-time settings, or gateway battery voltage.
Use this atlas to identify likely meaning and prepare for service. Shut off power, LP gas, fuel, or water when a listed appliance condition involves flame, gas smell, exhaust, generator shutdown, high temperature, moving jacks/slides, refrigerant, 120 VAC, control boards, repeated ignition failure, or a persistent lockout. Call the appliance maker, RV dealer, or a qualified RV technician for repair.
Owner-safe checklist
- Do not enable AGS indoors or in a confined space, and shut the generator down if exhaust, CO, or ventilation conditions are unsafe.
- Confirm from the app dashboard that Auto Mode and Air Conditioning Sense are enabled and that the current and set temperatures are displayed.
- Check only owner-accessible items: temperature setting, quiet-time window, sensor battery, sensor/gateway Bluetooth range, and gateway battery state.
- Call Cummins Onan, the RV dealer, or qualified HVAC/generator service if A/C demand or generator start behavior remains unclear.
Code tables for these appliances
- Cummins Onan QG gasoline generators (HGJAA, HGJAB, HGJBB) 32 codes
- Cummins Onan QG 2800i / 2500i LP inverter generators 29 codes
- Cummins Onan QG 2800 KV generators 4 codes
- Cummins Onan QG 4000 / 3600 LP generators 19 codes
- Cummins Onan QG 7000i dual-fuel inverter generators 25 codes
- Cummins Onan Quiet Diesel 5000-12500 generators 23 codes
- Cummins Onan Quiet Diesel 3200 generators 14 codes