How to set a norlake freezer defrost timer - Nor-Lake Freezer Norlake Refrigeration 6' x 6' Kold Locker Walk-In Freezer - 6' 7'' High w/Floor

What is the main product in the freezer?

Change the defrost timer.

in most cases its the defrost element as the other units last much longer unless the fan has become jammed this happens when people toss meat hard against the back wall if you know how to do polaity test using a multimeter do test on defrost element its not a thermistate as new age frezzers dont use them they use timers and plastic channels to curculate cool air

good luck need more addvice email me

Good day,
You will need an ohm meter to check the parts.
Your defrost system has failed.
It is made up of 3 components, 2 of which are located behind the rear panel in the freezer compartment.
Remove the rear panel. There is a cooling coil, that has a calrod heating element that runs along it's bottom. As well there is a defrost thermostat ( a small round 1" disk) which is located on the top of the same coil. Both should be checked with an ohm meter to test for continuity. The heater should read no more than 30 ohms, the thermostat ( IT MUST STILL BE COLD BELOW 30 DEGREES) should read zero ohms. Note: The heater rarely fails, the thermostat has a high failure rate.

The third item is a timer, or a solid state adaptive defrost control. Depending on age, and model, it is located , behind the kick plate on the bottom front.
Or, in the fresh food compartment on the roof.
If it is a timer, you can turn the timer shaft when the machine is running until the machine shuts off. With it still turned on, wait 40 minutes.
If the machine turns itself back on, the timer is O.K. if not, the timer is bad, and needs replaced.
If the Main heater checks O.K. and it has a solid state control, then replace the thermostat in the freezer compartment, and the solid state board.

Below is an excellant tutorial on defrost systems.

http://www.appliance411.com/faq/howdefrostworks.shtml
Thank you for using FixYa

Normally, freezers have electric heaters that are energized during the defrost cycle. Once out of the defrost cycle, the refrigeration system comes on but the fans do not. This allows the evap to cool off and to prevent circulating warm air from the heaters. This is controlled by a fan delay switch. It is a small, round device that can have 2, 3, or 4 wires going to it, depending on the manufacturer. It is usually clipped on to the end of the evap coil on one of the "U" bends, near the top, inside one of the ends of the evap. Usually where all the electrial components are located. It come in several variations, but it's main function is to prevent the fans from energizing too early. Usually does not bring fans on till evap hits 20 or so degrees. Check this out and get back to me.

The defrost system has failed and is not de-icing the coil or, the door is not sealing tight or too much time open allowing excess humidity to enter the chamber, thereby overcoming the capabilities of the defrost system. The system has a defrost timer someplace, check to see if it is running. If not, you can probably advance it into a defrost cycle with a screwdriver. (turn the shaft slowly until a click is heard and the system stops) Allow 20 or 30 minutes for the coils to defrost, and restart with the screwdriver if it has not took off on it's own. If the timer is found not running, replace it.

check out the defrost timer it sound like its in defrost. if that is not whats wrong then you can checkout the refrigerant by looking at the sight glass on the liquid line. It dhould not have any boubbles in it and if there is then your low on charge, n if threr isn't then you whille probebly be better off calling a service company out to repair the unit.

WALK INS HAVE TWO THINGS THAT SHORTEN DEFROST OR MAKE THEM LONGER. IF ALL THE ICE IS BEING CLEARED BY THE HEATERS IN THE COIL THEN IT WILL KICK OUT AUTOMATICALLY IF DEFROST CONTINUES AND THE COIL GETS TO HOT DUE TO AN OVERTEMP SENSOR ON THE COIL. HOWEVER IT WILL STAY IN A DFROST AS LONG AS IT IS PROGRAMMED TO UNLESS THAT SENSOR TRIPS. SO...... LOOK AT THE TIME CLOCK AND SEE WHAT LENGTH OF TIME ITS IS SET FOR. USUALLY A DEFROST CYCLE WILL BE SET FOR 30 TO 40 MINUTES. IF SET TO LONG THEN DEFROST GOES TO LONG AND ONLY COMES BACK ON WHEN SENSOR TRIPS. ADJUST CLOCK TIME TO 30 MINUTES OR 5 MINUTES LESSS THAN ITS SET AT RUN A FEW DAYS AND OBSERVE ICE FORMATION ETC. CLOCK MAY BE STICKING AND MAY NEED A LIGHT DRENCHING OF THE GEARS WITH A LIGHT OIL. TURN IT AROUND A FEW TIMES TO SPREAD OIL AROUND. YOU COULD RUN A CHECK ON THE CLOCK BY SETTING THE TIME TO TWO MINUTES AND GENTLY TURN IT TILL ITS CLICKS INTO A DEFROST AND WAIT . IT SHOULD COME OUT OF DEFROST AND BACK INTO REFRIGERATION IN 5 MINUTES. IF DEFROST IS SET WAY TO LONG THEN IT HAS BEEN RELYING ONLY ON THE TEMP OVERTEMP SENSOR TO TERMINATE DEFROST. IF IT FAILS THEN THE EXCESSSIVE DEFROST WILL CONTINUE TILL PRODUCT MELTS. SETTING THE CLOCK TO A SHORTER TIME SHOULD CORRECT BUT THE OVERTEMP SENSOR IS PROBABLY BAD . AVAILABLE FROM MOST COMMERCIAL REF REPAIR COMPANIES. OR YOU MAYBE CAN ORDER FROM MANUFACTURER AND CHACK EXACT OEM PART WIRE FOR WIRE ETC. LABEL ALL WIRES . TURN OFF POWER, TEST IT. MAKE NOTES.

Check the evaporator coil for frost buildup on the back. Check for frost on the suction line, the biggest line returning to the compressor. If frost is evident at these places you have a defrost system problem. These systems have a defrost timer that defrosts the coil at preset times. Check the timer for proper operation by marking the position of the dial and check back to see if it changes. If it does not change position the timer motor is most likely bad. If the dial is not rotating automatically you can manually turn the dial in the direction of the arrow and put it through a defrost cycle.

The defrost timer is normally located in the area of the temperature controls. There is a clutch head knob on the timer which can be rotated clockwise very slowly until a click is heard. Wait 30 minutes and defrost should take place in that time period. If defrost does occur and the system does not restart cooling, rotate the knob more and you will hear a second click and the compressor should start .
If the system restarts in the cooling mode in 18-22 minutes the defrost timer is good and the problem is more than likely in the defrost heater circuit.