Not making defrosting - True T-49 Side by Side Refrigerator Commercial

Check for ice / frosting inside the freezer .... If present you probably have a defrost problem.... This causes the freezer coil to ice up and block the air flow ... the causes could be a bad defrost heater , defrost timer, defrost sensors, or control board. Also make sure that the condenser coil is clean. remove ALL dust with a vacuum and a coil brush .the coil is located either on the bottom or on the back side of the unit... You didn't give the Make and model #

Your refrigerator appears to have a defrost problem. There are three parts tothe defrost system that may be causing the problem. The defrost timer located inside the controls panel just above the top shelf of the fresh food compartment. The defrost timer is seen as item 12 in this photo=> MBB1956GEQ_Controls Lets try to force defrost by turning the defrost time slowly clockwise until the compressor and fans stop. Leave the defrost timer like this up to 35 minutes and if the compressor and fans do not come back on automatically then the problem is the=> 67001036 Defrost Timer

If the defrost timer functions properly and still the refrigerator does not go into defrost we will need to move to the defrost heater=> 67002135 Defrost Heater Assembly

and the defrost thermostat=> 12001937 Defrost Thermostat

The defrost timer and defrost heater are found inside the back wall of the freezer and the defrost heater can be tested by the instructions found on the same page as the 67002135 Defrost Heater Assembly
If you have any questions I will be here should you need more answers, Thanks Sea Breeze

My fridge is running but not cold enough: Start out with the easy stuff first...make sure the lights go out when you close the door(s), make sure the doors are closing properly and the gaskets are closing fully and are not torn or ripped. Check to make sure the evaporator fan in the freezer is working, this fan blows the cold air around. If the fan is not working, possible bad fan motor - check for power to the f


The most common fridge "not cooling" problem is a frost free failure. Remove the access panel in the freezer section to expose the evaporator coils. If the coils in the freezer section get plugged up with frost, this frost will block the evaporator fan motor from blowing the cold air around. The fan blade can also hit this frost and either become noisy or stop altogether. Locating the defrost timer can be tricky....they are often hidden behind the back bottom corners of the fridge at the bottom, in the last few years the timers have been located in the ceiling of the fresh food section, and some are behind the cold control cover. Once you locate the defrost timer, slowly turn the screw likeknob in the middle of the defrost timer with a straight screwdriver until the fridge shuts off. You are now in defrost. If the defrost heater (s) comes on now, replace the defrost timer and defrost thermostat. If the heater(s) does not come on, you can continuity test the defrost heater for continuity or test for 120 volts to the heater(s). If you have no power to the defrost heater (s) you can also bypass the defrost thermostat to see if the defrost heater will come on, jumper the wires together to bypass the defrost thermostat. If the heater now comes on, replace the defrost timer and defrost thermostat. If the heater itself is bad, defrost the fridge with a hair dryer, replace the defrost heater (s) and defrost thermostat. If the defrost timer seems "hot" to the touch or is noisy ( like a ticking or screeching noise )...replace it.

Defrost timer


Defrost thermostat


Defrost heater

Make sure if the thermostat cuts off when the temperature is kept low. If not check the thermostat. also if this has an auto defrosting timer , the cycle is not working to defrost periodically.
this makes the freezerr less efficient .

did you read out the heater to make sure it's bad,do you have power coming to the heater

DH = Defrost Heater.

Kudos to kenmore for making an error message that makes sense.

Since the defroster timer turns on the defroster heater once every 24 hours, this makes sense.

If freezer is icing up, you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model

If freezer is icing up, you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model

If the refrigerator is not icing up it could be the defrost thermostat making the defrost cycle initiate every time the defrost timer makes defrost available. I do not recommend by-passing the defrost cycle, have the switch checked and replaced if needed.

Your whining noise could be many things...
The LINK on the bottom will help!


DEFROST TIMER
$9.50

Anthony

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