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I do not know this unit but I would assume the defrost timer has failed. Check if it is in warranty, if so make a warranty claim, if not you would either replace it or have somebody do that for you.
Yup, these timers have a tiny clock motor that can get lint on them, causing motor failure, should be simple replacement. Refrigerators in cold garages run more to regulate their temperature below 45 degrees.
You can by pass it but I wouldn't. You may need to replace the t'stat on this. This controls pretty much everything. Depending on your model, the defrost cycle can be adjusted to shorter cycles. Bypassing it would eventually lead to ice build up and a real mess to follow .
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.
There is a good chance, if the defrost timer is mechanical, that you can rotate (nudge) the timer to see if it get's going.
Most commercial refrigeration does not use a defrost thermostat, and a lot of it does not use a heater (they use a hot gas bypass valve and pump hot gas through the evaporator, rather than through the condensor.).
Sounds like the timer could be getting stuck and not releasing the defrost cycle. If you have to do it again, you should have the timer checked, or just replace it.
you say when you advance the defrost timer , id assume turn it ever so slightly the machine kicks on ad begins to freeze again?? then prior to advancing timer i would expect the unit to be totally dead(stuck in defrost mode).no fans,compressor or anything. that suonds like a bad timer or chck the wires going into the timer
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