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Error code reference

Polar Refrigerator Error Codes

23 error codes documented with diagnostic procedures.

Have your model number? Get codes specific to your unit.
AC HEAC heater faultAC rEAC heater relay on the main control board (power board) is stuck closed (N7LX/N8LX…dc HEDC heater faultdc rEDC heater relay (K1 on the DC Board) contacts are stuck closed (N7LX/N8LX models).FL --A flame is sensed at the burner when there should be none present; gas valve is…Flash 1AC heater faultFlash 10Communications between the user interface (controls) and the main control board (power…Flash 2Internal control fault detected by the main control board (power board).Flash 3On the main control board (power board), the limit circuit is open.Flash 4The AC heater relay on the main control board (power board) is stuck closed.Flash 5A flame is sensed at the burner when there should be none present; gas valve is…Flash 8The DC input voltage to the refrigerator is too low.Flash 9The DC input voltage to the refrigerator is too high.HI dcDC input voltage to the refrigerator is too high (N7LX/N8LX models).Lo dCDC input voltage to the refrigerator is too low; all modes are inhibited (N7LX/N8LX…Lo dc (alarm)DC input voltage to the refrigerator is too low; either GAS MODE or DC MODE (3-way), or…no ACAC voltage is not available to the refrigerator (N7LX/N8LX models).no dtCommunications between the user interface (controls) and the main control board (power…no FLThe burner did not ignite or re-ignite; no flame sensed at burner when there should be…oP LIOn the main control board (power board), the limit circuit is open (N7LX/N8LX models).Solid RedThe refrigerator tried to operate on the selected energy source(s) with no success; no…SrInternal fault detected by the main control board (power board); can be displayed in any…Thermistor FaultThe thermistor has been sensed as inoperable; temperature is being controlled via backup…

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Common questions

How do I find the error code on my Polar Refrigerator?
Most Polar refrigerators show the code directly on the control panel display. If your model has no display, it can be read by entering diagnostic mode with the key sequence for your model. The full procedures include model-specific instructions for reading codes.
Are these codes specific to my model?
The codes here apply broadly to Polar refrigerators. Meanings and diagnostic steps can vary by model and production year, so enter your model number for model-specific information and procedures.
What do I do if my code is not listed?
Some codes are model-specific or only appear in diagnostic mode. Enter your model number to get codes specific to your unit, or contact us. We update the database continuously from manufacturer service documentation.
How much does it cost to access the full diagnostic procedures?
A 3-day pass is $9.95 one-time and gives full access to all brands, codes, and procedures. Monthly access is $29/month with unlimited access to everything including Max AI diagnostics.