MFC09M3FW1 Does the model MFC09M3FW1 defrost itself?

https://www.buyspares.fr/images/.../1)%20instruction%20manual%20(pfz90wa).pdf

If the drain itself is clogged or frozen, it should be cleared. It is located under evaporator coils behind inside back freezer wall panel. The defrost pan itself under unit should have no need for emptying unless there’s a defrost problem that could create a lot of water at once when thawed. Heat under unit normally evaporates what little bit of water that’s created under normal circumstances

How to fix a leaking refrigerator - frozen defrost drain tube ...

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www.youtube.com/watch?v=_ycWz_U_GDU
Aug 14, 2010 - Uploaded by justenuf2b How to fix a leaking refrigerator by unclogging a frozen defrost drain tube for refrigerator. I had not intended

If the coil (in the freezer) is icing up then it's not being properly defrosted on a regular basis, ie. 2 - 3 times a day. On older models it's usually just a simple matter of replacing the defrost timer. On newer models, the defrost timer is integral with the 'motherboard', so the whole (expensive Chinese made) motherboard must be replaced because they're not serviceable.

Less likely (but possible) are the defrost heating element and/or temperature sending unit found on or near the coil itself. Least likely is a low refrigerant level, which would indicate a leak.

The defrost system is made up of the defrost heater, defrost thermostat and a timer. The defrost heater and thermostat are next to the evaporator which is behind a panel in the back of your freezer.

Suggest you go to sear parts direct and plug in the model number from the id tag (normally on the cabinet wall beside your crisper drawer) and it will give you an idea of the location.

its easy to remove the ice ( just add heat ) / but you do need to correct the problem . this sounds like a defrost cycle failure .. ck the defrost heater and the defrost terminator . and the heater itself .. the model # is not complete try to find the one on the unit itself . in order to get better info .. hope this helps mmm. feed back pls.. 7/10 //11

Your model has a simple defrost timer inside fresh food compartment and behind control panel. I would see if I could manually turn the timer clockwise until defrost comes on and compressor stops. If after 25 minutes it does not turn itself back on turn the time again clockwise slowly until it restarts. Part number 67001036 Defrost Timer

sounds like a bad defrost timer
or depending on the model a bad
electronic or adaptive defrost board

what's the model number off of the fridge?