Hello Customer (name blocked for privacy), I would check the Grey/Yellow wires coming off the ignition switch when the problems is occurring. It feed both the blower and directional circuit. I am sending a diagram that shows the circuit. The ignition switch can have in internal poor contact. Thanks for using Just Answer ,have a great day,Jerry.
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I will give an honest answer to the best of my knowledge. If my answer helps, please accept,if it saves you some money a bonus is appreciated.Thanks for using Just Answer, Jerry