A member with a 1999 Adventurer 35C reported that the rear A/C worked on 30-amp shore power but lost 120V power when running on the generator, while the front A/C continued to work. Members reviewed the many possible Winnebago wiring layouts, asked about breaker count, shore cord type, generator model, voltage checks, and noted that a 30-amp coach with two A/C units relies on load management and may shed the rear A/C under heavier loads.
Testing showed the power management system behaved...
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A member with a 1999 Adventurer 35C reported that the rear A/C worked on 30-amp shore power but lost 120V power when running on the generator, while the front A/C continued to work. Members reviewed the many possible Winnebago wiring layouts, asked about breaker count, shore cord type, generator model, voltage checks, and noted that a 30-amp coach with two A/C units relies on load management and may shed the rear A/C under heavier loads.
Testing showed the power management system behaved normally during overloads by dropping the rear A/C through the 12V control side, but the rear unit still had no AC power on generator even when its LEDs indicated it should be active. The member accessed the Todd automatic transfer switch, found that one generator-side output appeared dead, and confirmed the diagnosis by swapping the two outputs, which made the rear A/C work. The likely cause was identified as a failed relay/contact in the Todd transfer switch, and the member ordered a Go Power replacement, though the final installation result was not yet reported.
