Staff Answer
Sep 27, 2026 - 11:52 AM
If it cools fine on shore power but not on batteries, the fridge usually isn't getting enough 12V under load. Compressor fridges shut down on low voltage. With shore power off, measure the voltage right at the fridge while the compressor tries to run. Undersized wiring, a loose connection or a weak battery are the usual causes. If the voltage is solid, the DC side of the 638396/640291 power module (DE0061 serials above 14328524, discontinued) is next.
If you have any questions, just reach out at info@rvfridgeguys.com or call us at 800-712-8822. You can find everything we carry at www.rvfridgeguys.com.
