How do you top up a Bi?atoneM250? - Refrigerators

Need exact whole model # for more info.
sound like a defrost problem .
Defrost Bi metal or defrost heater bad and the wurst main computer board. Ice builds up on back wall of freezer.
thaw back wall remove panel heater will be at bottom of coil Bi metal will be at top of coil small disc shape thing with 2 wires coming out
check both . bi metal must be tested cold at 30 degree opens at 35 degree if never closes then there is your problem

If you leave the jumper in place it doesn't matter as the top and bottom terminals are shorted to each other.

To check the defrost circuit , unplug the refrig and inside the refrig section at the top
about 2" in from each side in the back , there are "D" slots to put a finger in , and pull
downward and foreword , to remove the control panel cover . Once removed , there is a 1/4"
screw on each side holding the adjustment indicator panel on , 1 phillips screw behind both
light bulbs , and 1 screw holding the complete panel to the rear wall . After removing these
5 screws , at the top right corner , with about 6-8 wires going to it , is the adaptive
defrost board ( adc ) . Sometimes you can see the electronic board and on newer refrig's , a
white
box will be seen . Inside this box , is the adaptive defrost control . Disconnect the plug
going to the board and on the right side of the PLUG , the far right wire is yellow , then
another color , then white . Using a small insulated wire with both ends stripped , insert
one end into the yellow wire hole and the other into the white wire hole . This will send
power directly thru the defrost bi-metal ( thermostat ) AND
heater to check if they are good .Plug the refrig back in . Now , if you have a clamp on amp
meter , clamp around the jumper wire while pushing in the light switch ( to turn off the
light to get only defrost amps ) which should be 3.5 or above indicating bi metal and heater
are good and adc is bad , OR , wait about 3-5 min and
look for a red glow at the bottom of the inside freezer panel , which will be the defrost
heater or listen for sizzling which will be the frost melting and dripping onto the heater
.If NO red glow , watch for a spark while removing the jumper wire you installed , from the
plug . If a spark IS seen , then the heater was on and the heater AND bi-metal are good . If
you see the red glow , hear the sizzling , or see the spark , then the adaptive defrost
board should be replaced . If no glow , sizzling or spark , then unplug the refrig and
reinstall the refrig control section .
Remove the food in the freezer section enough so that the 2 screws holding the lower freezer
panel on and the freezer panel , can be removed . Remove the panel . If the heater (black
element at the bottom of the coils ) wires are visible , trace them to the top of the coils
and disconnect . Use an ohm meter to determine if the element is good ( should show
continuity ) . If the element IS
good , at the top of the coils , is a 1" cylinder with 2 wires , clipped onto the coils .
This is the defrost thermostat ( bi-metal ) . Replace this part if the element shows good .
If the element shows bad , replace the element . NOTE 1 : sometimes the element and the
bi-metal come wired together and the replacement part comes with a new heater and bi-metal
already wired together . This would be the advisable replacement part . However , each part
can still be replaced individually . NOTE 2 : If looking at the bi-metal and the top plastic
" cap " looks cockeyed , replace the bi-metal as moisture has gotten inside and disturbed
its
designed function

Thaw out the evaporator and check your defrost heater for continuity. Check you bi-metal thermostat for signs of swelling. The bi-metal has to be @25f before continuity can be confirmed on it. Check your defrost timer or adaptive defrost control if the heater and bi-metal check out. Notice the bi_metal mounted upper right hand corner. It opens and kills the heater once the temp gets hot enough to melt the frost.(50f)

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Hi, Unplug the refrigerator. The automatic defrost is not working properly. You will need to remove the rear panel inside the freezer section and test the defrost heater and bi-metal switch. The bi-metal switch located on the top of the evaporator coil needs to be tested while it is still cold. Check and see if the switch has continuity. If the bi-metal switch shows an open circuit, replace it. If it shows a closed circuit, test the defrost heater the same way. If both the defrost heater and the bi-metal switch are ok, the defrost timer will need changed.
You will need to defrost the evaporator coils with a hair dryer. Please let me know if this helps you at all or if I can assist you further.

Thanks
Vic

Hi, You will need to check continuity on the bi-metal switch and it needs to be tested while cold. If the bi-metal has an open circuit, it will need changed. Remove the rear inside panel of the freezer and locate the bi-metal switch at the top of the evaporator coil.
I hope this helps you. Please let me know if I can assist you further.

Vic

the bi metal defrost is a defrost thermostat also known as a defrost limiter, it turns of the defrost heater after it warms up the evaporator sufficiently, it resets itself once the compressor comes back on after the defrost timer has timed out.

Hi, You will need to check three different parts of the defrost cycle. The most common problem is the bi-metal switch. UNPLUG the refrigerator and remove the rear inside freezer panel and locate the bi-metal switch attached to the evaporator coil in the upper corner. You will need a voltage/ohms meter for this test. Check the switch to see if it has continuity. Note: This switch has to be cold in order to test it! If it tests open circuit, you will need to change the bi-metal switch. If the bi-metal switch tests ok, then test the defrost heater the same as you tested the bi-metal switch.
IIf both of these parts test ok, you will need to change the defrost timer.
Please get em a model # and I can assist you on locating the timer.
I hope this helps you. Please let me know if I can assist you further.

Vic