True 49 cu. ft. / 1388 liter Commercial Freezer GDIM-49NT Logo
Posted on Oct 10, 2009
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Evaporator fans do not come on, why would evaporator is not cool enough?

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Northeast Cooling LLC

Northeast Cooling LLC

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  • Posted on Oct 11, 2009
Northeast Cooling LLC
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There are three main reasons the fans would not come on.
1: A bad door switch. There are switches on the top part of door frame. They turn fans off when door is opened to prevent warm air from being drawn into unit when door is open. If a switch goes bad the fans will never turn on.
2: Refrigeration problem. The fans are tied into a temperature switch called a fan delay. The fans will not come on until the coil is well below freezing. This is to prevent water spray after a defrost. If unit is low on gas or has any other cooling issue the fans will not come on.
3: Bad fan delay switch. If the fan delay switch becomes "stuck open" the fans will not be energized.

Feel the back of your evaporator coil, if it is very cold and frosted you probably have a bad fan switch, or a bad door switch. ;)

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