How to Repair Generac & Honeywell Generators with Overspeed Fault (Error Code 1200, 1205)

Is your Generac or Honeywell generator showing an Overspeed Fault with Error Code 1200 or 1205? In this step-by-step tutorial, I'll guide you through diagnosing and repairing this common issue to get your generator running smoothly again using the proper Generac Diagnostic Repair Manual procedures. There could be different reasons for this fault to trigger but in this case the error code appeared due to a disconnected stepper motor 10 pin connector. Don't forget to like, comment, and subscribe for more generator repair tips and maintenance advice!
Please Note: Always refer to the generator service manual for specific service information.
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[@alvinbihms9629]

Good to see military using their skills I was 63 C motor pool we serviced every and anything that burned gas. How do I go about purchasing a generac service and repair manual ? (Information is power )

[@tacticalpowerpro]

Thank you for your service 🫡. To get my hands on one of these I had to sign up for one of their HSB generator training classes. Information is power, this manual is a great tool to have specially if you work on these generators often like I do.

[@joselitomacapaz8521]

Thanks for your vedio sir ,,

[@tacticalpowerpro]

Thank you for watching my video sir 🫡

[@alvinbihms9629]

A diagnosis was right on ,step MOTOR was unplugged. I had just installed brand new generator and tested.

[@tacticalpowerpro]

Awesome to read the diagnostic was right on the money. Thank you for watching my video out of all the videos on youtube. I really appreciate it.

[@alvinbihms9629]

@@tacticalpowerpro HEY FOR SOME REASON MY BATTERY wont charge i have 120 V from T1 to the evolution 2 @ at generator where do i ck output battery charge

[@tacticalpowerpro]

@@alvinbihms9629 Hey, you can check the battery charger output or status at the controller but you will need the "dealer" access code. --> ESC, UP, UP, ESC, DOWN, UP, ESCAPE, UP, ENTER.

[@gersonhenrriquez6123]

What is the name of the piece

[@tacticalpowerpro]

What piece are you referring to? The mixer assembly or the stepper motor?

[@kennethcarnival]

Why do you have to also replace the mixer assembly when only the stepper motor is bad? Many people bought only stepper motors from Amazon and said that fixed the problem.

[@tacticalpowerpro]

Generac only sells the entire mixer assembly. They do not sell the stepper motor by itself. But if you can find the stepper motor through Amazon then more power to you, just replace the stepper motor which is really the issue.

[@djterrorist4819]

Jus did he same thing and still getting the same overspeed alarm I so hate generac

[@tacticalpowerpro]

@@djterrorist4819 What you did? You replaced the stepper motor?

[@djterrorist4819]

⁠@@tacticalpowerproyes and the controller also worked fine for 2 hrs then 1200 over speed alarm

[@tacticalpowerpro]

@@djterrorist4819 Did you replaced the entire mixer assembly or just the stepper motor? if you just replaced the stepper motor then make sure the stepper motor linkage and throttle plates in the mixer assembly do not bind in any way. Also did you test the resistance value at the connector of the new stepper motor?