20 CLR2160, CLRCO21751. Grasp the edges of the light housing lens opposite theexposed tab, and gently push the lens towards the tab(Figure 41).2. Pull the edge of the lens down and swing it out of thelight housing.IMPORTANTIMPORTANTALWAYS use a genuine U-Line replacement bulb(Part No. 31317) in the light housing. Use of anyother bulb within the housing will generateexcessive heat, causing damage to the light housingand cabinet interior, and compromising the precisetemperature control of your unit.3. Replace the bulb only with a genuine U-Line Part No.31317 replacement.4. Replace the lens by first inserting the tab side back intothe housing at a slight angle. While gently pushing thelens towards the tab end, push the free end up into thehousing, and release when you will hear a snap/click.WARNINGELECTROCUTION HAZARDNever attempt to repair or perform maintenanceon the unit until the main electrical power hasbeen disconnected.Note: Recommended refrigerator temperature setting is38°F.Troubleshooting - What to check when problemsoccur:14 TROUBLESHOOTING GUIDEPROBLEM POSSIBLE CAUSE REMEDYUnit does not operate andelectronic display is blank.No electrical supply Plug unit in or check circuit breaker.No interior light (Model CLRCO2175) No power to unit Make sure power cord is plugged in.Loose or burned out bulb Tighten or replace bulb (See MAINTENANCE; LIGHTBULB REPLACEMENT).Electronic display is blank andinterior light is ON with door OPEN(Model CLRCO2175).A display function has changed. Touch and hold the warmer temperature button andtouch and release the POWER button three times, thenrelease the temperature button. The display shouldbecome visible.Electronic display shows repeating,randomly flashing symbols andpartial characters.A factory control mode has beeninadvertently entered.Touch and hold the warmer temperature button andtouch and release the LIGHT button three times, thenrelease the temperature button to exit the factorycontrol mode. The set-point temperature should nowbe displayed.Electronic display shows:0, 1 to 26, or 99.A factory control mode has beeninadvertently entered.Repeatedly touch the warmer temperature button toadvance any number shown to 99 and touch andrelease the LIGHT button. The set-point temperatureshould now be displayed.Electronic display shows E3. Door has been left open longer than20 minutes.Close door completely. The set-point temperatureshould now be displayed.Electronic display shows one ormore of the following: ER or P1.The unit is displaying an error code. Record the error code(s) displayed and call for service.P1 - Drain line is restricted.The unit is not cold enough. Dirty condenser coils Clean condenser (See MAINTENANCE; CONDENSERCLEANING).Airflow to front grille blocked Airflow must not be obstructed to front grille (SeeOPERATION).Temperature not set cold enough(Model CLRCO2175)Use the temperature controller to set temperaturecolder. Allow 24 hours for temperature to stabilize.Door is not closing completely. Make sure no obstructions are blocking the door andunit is level (See MAINTENANCE; LEVELING).Door adjustment required (See MAINTENANCE; DOORALIGNMENT CHECK AND ADJUSTMENT).Door gasket not sealing properly Adjust door (See MAINTENANCE; DOOR ALIGNMENTCHECK AND ADJUSTMENT and DOOR REVERSAL).Noise during operation Certain sounds are normal. Soft sounds from the fan, water running in the icemaker and the sound of ice dropping will be heard.