When unit is starting up there are about 5 or more clicks at the defrost timer.
There is a klixon that allows the fans to run when the coil is cold enough. Check it's closing when at -12c
SOURCE: Unit not freezing , evaporator fan wont run
If this is a Bev-Air, don't think the door switch will control the fan. At the evap, there is a temp sensor called a fan delay. When unit goes into defrost mode, this warms up. Some also serve a dual purpose. It will terminate the defrost cycle at a certain temp., say 51 degrees or so, at the evap. Anyway, when unit comes out of defrost, it keeps the fan off so it allows the evap to cool quicker and to prevent circulating warm air. This could be your problem. Not a hard fix but they can be a pain sometimes. Outside chance that the unit is low on refrigerant (freon). This will not let the evap get cold enough to trip the sensor back into position to turn the fan on. Good Luck. Restaurant Parts and More carry alot of Bev-Air stuff. 1-888-814-1110. Ask for Rick
SOURCE: evaporator motors won't run
Normally, freezers have electric heaters that are energized during the defrost cycle. Once out of the defrost cycle, the refrigeration system comes on but the fans do not. This allows the evap to cool off and to prevent circulating warm air from the heaters. This is controlled by a fan delay switch. It is a small, round device that can have 2, 3, or 4 wires going to it, depending on the manufacturer. It is usually clipped on to the end of the evap coil on one of the "U" bends, near the top, inside one of the ends of the evap. Usually where all the electrial components are located. It come in several variations, but it's main function is to prevent the fans from energizing too early. Usually does not bring fans on till evap hits 20 or so degrees. Check this out and get back to me.
SOURCE: True freezer model TS49f-RC. Evaporator fans will
You are most likely correct. Most manufacturers of freezers have fan delay/defrost terminators. But keep in mind that if the box is hot, it will not stay in defrost as that is what the terminator is designed to do. Does the unit ever get cold? You may have a refrigeration problem and the terminator is good. If you can give some additional info, I'll be glad to keep assisting you to get it going.
SOURCE: Beverage Air. Model: CFG24-1. The evaporator fan
http://beverage-air.com/pdf/manualsbycategory/K%20Series%20-%20Bottom%20Mount%20Reach-Ins/CFG_CRG_KF_Series809-046A.pdf
The fan has a limit control wired in series that shuts the fan down until the coil temperature reaches 25*F. this prevents the fan from blowing warm around after defrost.
There is also a switch which is placed for the door to close. Either one may be defective.
Worst case is the freezer is not pulling down temperature wise.
SOURCE: i am having a problem with my freezer, the
do you have just fan delay or fan delay / defrost temination?
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