Generac Generator Error Code 1518: How to Fix It

Q: Can I reset error code 1518 on my Generac generator?

Yes, after fixing the underlying issue, you can usually clear the error by cycling the generator's breaker or disconnecting the battery for a few minutes. However, if the problem is not resolved, the code will return.

Q: What causes field current overload in a generator?

Common causes include a shorted diode in the rotor, a faulty voltage regulator, damaged wiring, or an overload condition. The field current can spike if the regulator tries to compensate for a weak output.

Q: How much does it cost to fix error 1518?

If you DIY and replace the rotor or voltage regulator, parts cost between $50 and $200. Professional repair including labor may range from $300 to $600.

Q: Can I still run my generator with error 1518?

No. Running the generator with a field current overload can damage the alternator and cause further electrical issues. Stop using the generator immediately and troubleshoot.

Q: What is the difference between field current and output voltage?

Field current is the current flowing through the rotor to create a magnetic field. Output voltage is the AC voltage generated in the stator. A high field current often indicates a problem with the magnetic circuit or regulator.

Abstract

Generac error code 1518 indicates a field current overload in your generator's alternator. This means the current flowing through the rotor (field) windings is too high, often due to a shorted diode, faulty voltage regulator, or wiring issue. This guide will help you diagnose and fix the problem safely.