1404
UnclassifiedCooling
What This Code Means
High Temperature; Coolant temperature greater than 246 ºF (119 ºC) for 1 second; Missing pulses during running; While running, no tooth pulses for 75 consecutive milliseconds.; After crank command, RPM and DPE frequency both read 0.; After crank command flywheel teeth count and DPE frequency both read 0.; Underspeed; <83.3% speed (60 Hz) or <66.6% speed (50 Hz) for 30 seconds.
Possible Causes
- •Air Flow Impeded / Flow Issue
- •RPM sensor alignment
- •low battery
- •failed motor
- •Unit Overloaded
- •Fuel System issue
- •highly inductive loads
- •actuator
- •fuel supply
Suggested Actions
- 1Check the inlet/outlet for debris.
- 2Check coolant sensor circuit for proper operation.
ASK RUDY ABOUT THIS FAULT
Get a diagnosis walkthrough for 1404 on your specific Generac unit — cited to the OEM manual, not a forum guess.
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