House battery dead
Correct. The red light can be on and while it means there is power to the coach, it doesn’t mean the shore power is charging the house batteries. You can put a volt meter on your house batteries and cycle the use/store switch. When you see the voltage go up 14v then it is in the charging mode.
If you have an Inverter, you can turn it in and use its voltmeter to tell when the use/store switch is in the charge mode.
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