• There can be a variety of reasons why your Centigrade Thermoelectric Cooler has poor performance. Follow the step-by step checklist below to investigate.
• Is the cooler on? check that the operating mode panel is illuminated: in cooling mode the word "cool" should glow blue; in heating mode the word "hot" should glow red.
• Allow 2 to 4 hours for the cooler to reach optimum cooling or heating performance. Up to 8 hours if fully loaded and the content was not pre-cooled.
• Check all cable connections, insure the Automotive Power Adapter is fully inserted at both ends.
• Verify the fan is blowing air by listening for fan noise and feeling air flow coming out of the outside vents. In cooling more the expelled air should be warm, in heating the expelled air should be at ambient temperature or slightly cool.
• Inside the cooler, check for air flow coming out of the inside air vent.
• Insure the inside air vents are not obstructed by the content.
• Check the air vents and metallic sinks are not overly dirty, you can clean out the vents using a vacuum cleaner. remember, it is better to suck air out of the system to clean it, than blowing air into it.
• In low ambient conditions combined with high humidity conditions, the inside of the thermoelectric cooling system could "freeze up" (see additional details below).

2. When I plug in my cooler, it does not turn on.

• Most likely the Automotive Power Adapter is not properly inserted in the vehicle's automotive plug. Insure the plug is fully inserted. also check the plug on the cooler side is fully and properly inserted.
• If all cables seem to be properly inserted, but the cooler still does not come on (operating mode panel is off) the following might have happened: the vehicle's power plug does not have power, insure the engine is on, check the vehicle's fuse panel; the safety fuse in the Centigrade Automotive Power Adapter is burned out, check your owner's manual on how to check and replace this fuse; if you are using the Centigrade Wall Outlet Adapter check that it is properly plugged into the wall, the Adapter may be in "fault mode", to reset the unit, disconnect the cooler, disconnect the Wall Outlet Adapter from the wall and wait one minute before restarting the system.

3. The fan is not turning.

• Perform checks as described in section 1 and two.
• If the operating mode panel is illuminated, but the fan still does not turn:
• Verify foreign objects (hair, sticks, etc) are not blocking the rotation of the fan.
• The fan rotor may be bad, please contact your Vendor or contact us for repair.

4. The fan seems to turn very fast, I can hear a high-pitch fan noise.

• This is an indication that the air flow is obstructed.
• check both inside and outside air vents, insure there are no foreign objects blocking the air flow. On the inside of the cooler, try to keep the content away from the intake air vent (bottom vents).

5. After running for a while, my cooler seems to loose performance.

• This can happen when in cooling mode in low ambient and high humidity conditions.
• Inside the cooler, look through the air vents exhausts (top vents) and look for frost or ice formation on the metallic sink. Excessive frost can restrict air flow, reducing the system's efficiency.
• This is not a "breakdown", just a normal behavior common to all refrigeration systems. You can either unplug the cooler for a while (so frost can melt), drain the excess condensation, and restart the cooler.
• We also provide the Centigrade Universal 4-in-1 Power Adapter that is specifically designed to eliminate the frost effect, it works like the defroster in your home refrigerator.

6. My cooler does not work as good as it used to.

• Clean the air vents as described in section 1 and as described in the Maintenance Guide.
• If you cooler is several years old and has been used often, it simply has aged a bit.
• Please avoid switching from cooling to heating mode rapidly (consult your owner's manual), this will accelerate the aging process of the thermoelectric system.

7. Troubleshooting chart.

• Use the chart below for quick troubleshooting.