Why generators show "no ac output from generator": 23 documented causes and brand-specific fixes, compiled across 7 manufacturers.
Generator internal failure
3 brands- Carrier: 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. Contact a dealer facility.
- Generac: 1. Reset circuit breaker to ON (or CLOSED). 2. *; 1. Reset generator disconnect to ON (CLOSED). 2. * 3. Check the controller screen to verify status.
- Nexus: 1. Reset to ON/CLOSED. 2. * 3. Auto-reset - Wait 5 min. and attempt restart. *Contact the nearest Dealer for assistance.
Check main line circuit breaker; Check circuit breaker & fuses; Transfer switch set to NORMAL position; Generator internal failure; Thermal circuit breaker open
3 brands- Ford: 1. Reset to ON or CLOSED; 2. Reset and replace, if necessary; 3. Set to GENERATOR position; 4. *; 5. Auto-reset - Wait 5 min. and attempt restart
- GenSpec065: 1. Reset to ON or CLOSED; 2. Reset and replace, if necessary; 3. Set to GENERATOR position; 4. *; 5. Auto-reset - Wait 5 min. and attempt restart
- Olympian: 1. Reset to ON or CLOSED; 2. Reset and replace, if necessary; 3. Set to GENERATOR position; 4. *Contact the nearest Authorized Dealer for assistance; 5. Auto-reset - Wait 5 min. and attempt restart
Check main line circuit breaker
2 brands- Carrier: 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. Contact a dealer facility.
- Generac: 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. * 5. Auto-reset - Wait 5 min. and attempt restart.; 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. *Contact the nearest Dealer for assistance. 5. Auto-reset - Wait 5 min. and attempt restart.
Check circuit breaker & fuses
2 brands- Carrier: 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. Contact a dealer facility.
- Generac: 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. * 5. Auto-reset - Wait 5 min. and attempt restart.; 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. *Contact the nearest Dealer for assistance. 5. Auto-reset - Wait 5 min. and attempt restart.
Transfer switch set to NORMAL position
2 brands- Carrier: 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. Contact a dealer facility.
- Generac: 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. * 5. Auto-reset - Wait 5 min. and attempt restart.; 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. *Contact the nearest Dealer for assistance. 5. Auto-reset - Wait 5 min. and attempt restart.
Thermal circuit breaker open
2 brands- Generac: 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. * 5. Auto-reset - Wait 5 min. and attempt restart.; 1. Reset to ON or CLOSED. 2. Reset and replace, if necessary. 3. Set to GENERATOR position. 4. *Contact the nearest Dealer for assistance. 5. Auto-reset - Wait 5 min. and attempt restart.
- Nexus: 1. Reset to ON/CLOSED. 2. * 3. Auto-reset - Wait 5 min. and attempt restart. *Contact the nearest Dealer for assistance.
Main line circuit breaker is tripped/open
2 brands- Generac: 1. Reset to ON/CLOSED. 2. * 3. Auto-reset - Wait 5 min. and attempt restart. *Contact the nearest Dealer for assistance.; 1. Reset to ON/CLOSED. 2. * 3. Auto-reset - Wait 5 min. and attempt restart.*Contact the nearest Dealer for assistance.
- Nexus: 1. Reset to ON/CLOSED. 2. * 3. Auto-reset - Wait 5 min. and attempt restart. *Contact the nearest Dealer for assistance.
1. Check main line circuit breaker.
1 brand- Generac: Reset to ON or CLOSED.
Check circuit breaker
1 brand- Generac: 1. Reset to ON or CLOSED. 2. Reset and replace if necessary. 3. Set to GENERATOR position. 4. Take generator to an Authorized Generac facility.; 1. Reset to ON or CLOSED. 2. Reset and replace if necessary. 3. Take generator to an Authorized Generac facility.
Check vehicle circuit breaker & fuses
1 brand- Generac: 1. Reset to ON or CLOSED. 2. Reset and replace if necessary. 3. Set to GENERATOR position. 4. Take generator to an Authorized Generac facility.; 1. Reset to ON or CLOSED. 2. Reset and replace if necessary. 3. Take generator to an Authorized Generac facility.
Transfer sw. set to NORMAL position
1 brand- Generac: 1. Reset to ON or CLOSED. 2. Reset and replace if necessary. 3. Set to GENERATOR position. 4. Take generator to an Authorized Generac facility.
1. Check circuit breaker.
1 brand- Generac: 1. Reset to ON or CLOSED.
Defective Control Module circuit board
1 brand- Generac: *Contact the nearest Authorized Dealer for assistance.; Replace board.*
Defective AUTO/OFF/MANUAL switch Open/disconnected wire #15A between AUTO/OFF/MANUAL switch and Control Module circuit board.
1 brand- Generac: 1. Replace switch.* 2. Reconnect/close wire.
Defective AUTO/OFF/MANUAL switch
1 brand- Generac: Replace switch.*