12v LED lights flickering when furnace turned on...
Pardon the basic nature of my question.
2010 Flagstaff, no idea the age of battery.
30a shore power, all well.
Turned furnace on for first cool weather this season and overhead 12v start flickering, going dimmer and dimmer.
Voltmeter with no furnace or other load: 13.5v
Turn furnace on, flickering starts, and volts drop to 8.6ish....
Turn furnace off, goes through cool down, fan stops....lights stay dim for maybe a minute and then are back on, normally.