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I wouldn't take that as the final answer, based on what you're describing it feels like something else is going on.
I've overloaded my 803a 2 times on my house and it was painfully obvious it was in distress, engine slowing down, all lights dimming in the house, pouring black smoke.
I suggest...
Out of curiosity could you say how many tons your AC is? Or even better post a pic of the info sticker on it.
I know my 3 ton AC would make my 803a lurch on its trailer every time it started, It's much better with a hard start kit on it.
Still dims the lights though.