Before you call

Quick fixes

Most problems come from the power supply or where the unit sits. Check these first.

Full troubleshooting guide

It won’t turn on

  • Check there is 12 or 24 V DC at the fridge, and check your battery voltage.
  • Check polarity: + to + and − to −.
  • Check the fuse near the battery. Replace it if it’s blown.
  • Low battery? The compressor stops below 9.6 V (12 V) or 21.3 V (24 V) and restarts on its own.

It’s running but not cold

  • Give it at least 4 hours after first switch-on.
  • Check the thermostat dial and the fridge/freezer switch.
  • Leave 3 in (7.5 cm) of space around the sides, out of direct sun.
  • Lots of warm food added? It takes time to pull down.

Lid won’t open

  • Make sure it isn’t locked.
  • Just closed it? Wait a few minutes for the pressure to even out.
  • Never force the handle.

Too much frost

  • Defrost when frost is thicker than 10 mm.
  • Check the lid seal is clean and closes fully.
  • Wrap food well; humid weather adds frost faster.
Find your model

Manuals & downloads

DC160 · DC400

Chest fridge/freezers with dual thermostat (also DC50, DC100)Chest series manual (PDF) →DC160 product page →DC400 product page →

DCRF450

Upright fridge with top freezer, two compressorsDCRF450 manual (PDF) →Product page →

All household models

Specs for the full 2026 rangeHousehold catalog 2026 (PDF) →Troubleshooting guide →

Older models: DC165, DC225, DC238, DCR390 spec sheets

Don’t see your model? Send us the model and serial number from the back of the unit.

Household warranty

2-year limited warranty

Two years from the purchase date, to the original owner, against defects in workmanship and materials. We repair or replace defective parts at our option.

Full terms are in your user manual.

How to make a claim

  1. Fill in the technical assistance form with your model, serial number and purchase date.
  2. We’ll confirm the fix and send a return authorization (RMA) number if the unit needs to come back.
  3. You ship it to us; we pay return shipping within the continental US.

Not covered

  • Accident, misuse or unauthorized repairs
  • Installation not done per the manual
  • Your power supply, fuse and wiring
  • Finish damage after delivery; light bulbs
Parts

Replacement parts, shipped from Tucson

Thermostats, control units (ECU), hinges, handles, keys, lights and shelves for current and older models. Can’t find your part? Tell us the model and we’ll check.

Shop parts & accessoriesAsk about a part
Medical & programs

Support for vaccine refrigerators in the field

Installation manuals and user guides ship with every system. For spare parts, warranty (2-year replacement parts, 7-year prorated battery) and technician support, contact our medical team.

Ian TansleyDirector of Medical Sales

Medical@SunDanzer.comMedical products & datasheets →

Still need help?

Contact support

Technical assistance form

For a fridge that isn’t working, a warranty claim or a part question. Tell us the model, serial number and your power system (solar, battery, voltage), and our Tucson team will help.

Call or email

(520) 882-9100

info@sundanzer.com

Office: Mon–Fri, 9 am – 5 pm
Warehouse: Mon–Fri, 7 am – 3:30 pm
Arizona time

Not a technical question?

Orders, shipping, sizing or anything else.General questions form →Solar sizing calculator →

Tucson, Arizona

420 E Aviation Drive, Suite 120
Tucson, AZ 85714