Question about True TS-72FG Stainless Steel Freezer 3 Glass Doors 72 cu ft

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Evap fans wont come on

What to check for evap fans not coming on

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Check to see if the door switch is stuck open

Posted on Dec 21, 2013

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Delay on evap. fan sistm.404a


Give the evaporator a chance to get cold, then check you've got power to the fan, via the evaporator thermistor and door switch

May 02, 2012 | True Freezers

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Compressor runs but internal fan isn't working, switch appears good what do I need to check regarding the fan?


Check to see if there is correct,complete power to the fan. If not, look for a fan delay that may be attached to the evap. It comes in many configurations. It may have two or three wires going to it. They may be two black wire or 3 wire of different colors. Power goes to the fan thru this device. It may not be working or the evap not getting cold enough to activate it. I will need model and serial to help more.
Let me know what you find.

Jun 01, 2010 | Traulsen 24.2 cu. ft. / 685 liter...

1 Answer

Fans not running, everthing else runs. True model T-72F reach in


In most cases, there is a device located in or on the evap that senses the temp of the evap. This can be a defrost terminator/fan delay. Sometimes they are separate devices and sometimes they are a 2 in 1 device. If the evap does not get cold enough, the fans will not come on. Usually about +20 degree F. It is to prevent circulating warm air after a defrost and to keep from overloading the compressor after a defrost as heat is generated by electric elements. I would look to see if the defrost terminator / fan delay has malfunctioned, then I would check the refrigeration system performance.

Apr 23, 2010 | True 72 cu. ft. / 2039 liter Commercial...

1 Answer

Compressor works, fans not working, ice maker not filling with water. what is wrong


several things could cause this 1 not coolind evap caused by freon leak evap needs to get cold before fans run most modles 2 bad fans 3 im wont fill untill it reaches about 10 degrees you may need service tech sorry

Jan 29, 2010 | Freezers

1 Answer

Evap fan will not come on,jumped out the fan control fan comes on


Since this is a freezer, it should have a defrost terminator/ fan delay. This could have gone bad or you may have a refrigeration problem. Such as low on freon due to a leak. Need more info, I'll explain in detail. Let me know. Will Be more than happy to.

Aug 24, 2009 | Beverage-Air 23.1 cu. ft. / 654 liter...

1 Answer

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.

Aug 13, 2009 | Nor-Lake Freezer Norlake Refrigeration 6'...

1 Answer

My walk-in's ceiling panel is dripping


The coil in the conditioned space is called the evaporator.
If the water droplets are forming on the ceiling around the evap, it is due, most likely, to the defrost cycle being too long.
Defrost cycle: compressor stops, evap fans stop, electric heaters in the evap come on to clear any ice/ frost on evap fins/ coil.
The ice/ frost melts and some of it turns into vapor. As it hits the cold ceiling surface, it condensates into water droplets. Defrost cycle could be too long. Usually 4 time aday and no longer than 30 minutes should be enough unless there is high humidity.
There could be another cause.
Normally, after a defrost cycle terminates, the evap fans do not come on, due to a delay control. This prevents circulating warm are due to the heaters. The compressor comes on and cools the evap down to, usually 20 degrees or so, and then the fans come on. What could be happening is, the fans are coming on too early and blowing the water driplet off the evap and onto the back wall of the unit.
A third item, is to be sure that the condensate drain is "P" trapped. The prevents warm, outside air from being drawn in and causing exess frost build up, thus excess water and vapor.

Good luck and hope this helps

Jul 24, 2009 | Nor-Lake Freezer Norlake Refrigeration 8'...

2 Answers

Freezer Not Fan not running!


Most all commercial freezers have some sort of fan delay/ defrost termination device. Commonly called a "Klixon" (pronounced clicks-on). It is a device that is attached to the evap. It's function is to terminate the defrost cycle when the evap reaches a certain temp, say about 50 degrees or so, to ensure there is no build up of frost/ ice on the evap. It then allows the compressor to run, and cool the evap down to a reasonable temp., say about 20 degrees, and then let the evap fan come on. It prevents overloading the compressor during a high temp condition, and it also prevents circulating warm air left from the defrost cycle. I believe this device is most likely your problem. With no air circulating, the box will no cool down.. I have seen them burn and/or slhort internally. They can come apart. too. I would look here for that problem. the True manufacturing website does not give alot of info on this piece of equipment, such as a wiring diagram but manuals are available.
Check this out and let me know how it comes out.

May 17, 2009 | True 49 cu. ft. / 1388 liter Commercial...

1 Answer

Evap fans not turning on


If this is a commercial unit, you're too low on refrigerant (freon). Freezer should be about a minus 10 degrees for the evap and high side is ambient converted to a psi for the type of refrigerant that is in the system plus 25-30 psi.
The evap fans will not come on because the evap is not cold enough.
Hope this helps and good luck.

Apr 09, 2009 | Freezers

1 Answer

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

Oct 09, 2008 | Beverage-Air 23.1 cu. ft. / 654 liter...

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