Originally Posted by FionaGrant
Whenever we turn on the range hood fan while connected to shore power, a fan in the electrical box under the fridge starts up.
Turn off the light, the fan turns off.
Seems odd that one light bulb would cause this?
Not necessarily. There are other 12v loads besides the range light, such as refrigerator, water heater, CO detector, and charging the 12v battery. Turning that light on likely adds enough draw to start the power converter fan running.
The bulb appears to be a incandescent, if it's a issue you may be able to swap it out easily with a LED bulb which MIGHT NOT kick the fan on.
Amazon has them, 10 for $8.99, or maybe your local RV stealership might have them. https://www.amazon.com/Bright-Traile...e95133f20&th=1