Question about Nor-Lake Norlake Refrigeration 4' x 6' Kold Locker Walk-In Cooler - 6' 7'' High w/Floor
I have the 1998 model MRSC20KWXAWH I need to find the defrost timer so I can test the heater to see if it works before ordering a new one. does anyone know were it is? also my ice maker stopped working about a year ago everything looks fine but no ice?
Yes the ice buildup is coz of a problem in the defrost cycle... and u wud be required to test all the three components.....
first we ll see how u need to check the defrost timer....
Before testing the defrost timer, unplug the freezer to avoid an electrical shock hazard.
A mechanical defrost timer controls the defrost cycle of the appliance. In older models, the timer runs continuously and roughly every six hours, shuts off power to the cooling system and sends power to the defrost heater. In newer models the timer advances only when the compressor or defrost cycle is running - an improvement for efficiency. As the timer advances, power to the heating element shuts off and power is restored to the cooling system. If the timer does not advance, the appliance will be stuck either in defrost or refrigerate mode, resulting in, respectively, no cooling or frost build-up.
The defrost timer is usually found behind the front grill of the freezer. It may also be found behind a cover plate inside the freezer, in the temperature control console, or behind the freezer near the compressor.
To test whether the defrost timer is simply failing to advance, locate the advance screw and turn it clockwise until you hear it click. This advances it to the next mode. If it was cooling before, it is now in defrost mode. Simply wait about 35 minutes and check whether it has left defrost mode and has resumed cooling (listen for the compressor). If it does not advance, the timer motor is probably bad and the entire timer needs to be replaced. If it advances as it should, then you can follow the steps below to test the switch electrically.
The timer is usually held in place with one or more screws. Remove the screws and gently pull the timer out far enough to disconnect the wiring connector. The connector can be removed by firmly pulling and rocking it left and right. It is not necessary to note the position of the wires because the connector plug is keyed so that it can be replaced in only one way.
Test the timer for continuity using a multitester. Set the multitester to the ohms setting X1. The timer has four terminals. Locate the common terminal, it should be labeled "3" or "C". If the terminals are not labeled, determine which terminal coincides with the common wire in the connector plug; it is usually the white wire.
Once you have located the common terminal, touch one probe to it. Touch the other probe to each of the three remaining terminals. The multitester should display a reading of zero or near to zero ohms (which indicates continuity) for one pair of the terminals and possibly two pairs. The third pair of terminals should show no continuity (infinity).
Locate the timer switch and turn it clockwise until you hear it click. Now retest the timer as you did above. One pair of terminals should indicate continuity (possibly two pairs). At least one pair should give a reading of infinity. Note however, one of the pairs that showed continuity in the first test should now read infinity and one pair that read infinity should now show continuity. If the defrost timer does not pass these tests, it is likely that it should be replaced.
* We have received two reports of cases in which only one pair of terminals shows continuity and when the timer is advanced, the same pair still shows continuity. For these isolated cases, this was reported to be the correct operation of the timer. At this time we have not been able verify this case. This may indicate a specific model or models that use a different wiring configuration than discussed in this article. Also, note that this article applies to mechanical defrost timer controls and not electronic or adaptive defrost controls.
Posted on Aug 30, 2010
Tips for a great answer:
You have a defrost timer behind the front kick plate turn
it clockwise slowly until compressor and fans stop. Once this happens the timer
should remain off for 30 minutes and the defrost heater should come on during
the first 15 minutes. If after 30 minutes the defrost timer part=> 215846602 Defrost Timer Assembly
should come out of defrost and the compressor and fans should restart, if not
advance the timer clockwise until they start and replace timer. Try that first
and tell me what your results are. If that is not the problem then we can
narrow this down to the defrost heater=> 218657301 Defrost Heater
or 5303917954 Defrost Thermostat How to test the defrost heater is
found on same page as the defrost heater. If you have any questions I will be
here to help you, Thanks Sea
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