Household fridges & freezers

Troubleshooting guide

Answer a few questions and we’ll walk you through the same checks our technical support team uses. Most problems turn out to be the power supply, and you can fix them yourself in minutes.

Troubleshooting guideDownload the full guideThe interactive guide needs JavaScript. You can download the complete troubleshooting guide as a PDF instead.Download the PDF

These steps are for SunDanzer DC household fridges and freezers (DC160, DC400, DCRF450 and older chest models). For a medical refrigerator, email Medical@SunDanzer.com.

Full troubleshooting guide (PDF)

Every step with photos, wiring diagrams and controller compatibility tables. Handy to print and keep with the fridge.

Download the PDF

Good to know

About 9 in 10 problems we see come from low voltage: a loose connection or a battery that isn’t fully charged.
The controller shuts the compressor off below 10.4 V on a 12 V system or 22.8 V on 24 V.
Use 12 AWG or thicker wire from the battery. 14 AWG is only OK under 10 ft on a small unit.
The red fault light is a small LED in the compressor compartment, behind the side or back cover.

Replacement parts

Thermostats, controllers (ECUs) and fault LEDs.

Parts & accessories →

Still stuck?

Tell us your model, battery voltage and what the light is doing. A photo of the compressor label helps.

Technical assistance form → info@sundanzer.com