Question about Maytag SkyBox MBV1976A Beverage Dispenser
Hi and welcome to FixYa I am Kelly.
On these units the compressor switches on and off. The fan runs constantly to maintain and even temperature for the contents. It is always powered by the main board from connector J2 with 12VDC.
You did nothing wrong the unit is operating normally. I would be a bit weary about using 2 fans as the Main board PCB transformer may overheat and burn out trying to produce enough power to run 2 fans over an extended time. Most PCBs are capable of providing the needed power for all circuitry but no extras...
The air flow from the fan should be blowing toward the evaporator coils and not away from them. Seems in 2004 they figured out some of these were assembled incorrectly. See this bulletin: http://www.servicematters.com/maytag_library/docs/TDR-0041-S.pdf
This is the service and installation manual:
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Posted on May 27, 2010
If you aded the second fan in parallel that could not harm anything and if they supposed to cool the device the only way that could affect it is to short the time they work ..cause all thermostat guided fan are programmable ..(so you should have a min temp switch off point in the settings ..and you should been able to be set to a certain temperature to go on and off ...practically to have a max point to go on ..and a lower one to go off) So if you do not have such a thing in the setting menu ..you do not have a thermostat switch for the fans...inside..Like you already said the sides of the case already have a lower temperature ..so this is a good thing for the system to work ..The only thing you should be worried is if they do not run on when they should ...cause in this case you will have a bigger task on the other cooling devices..
The fans themselves are not big consumers of power ..so if the will run all the time this should not be a issue ..
Anyway ..if the compressor run first ..and the system is cool inside...than its all ok ..when the fans run all the time and the compressor too and the unit is not cooling well than it is a leak on the system ...
anyway those fans are just circulating the air to level the temperature and they are just to make the system job easier...and not to cool something that is heating ...I think ..and in this case they should run all the time ..or you can make them a manual switch for use in special cases when you do not see the point in keeping them in use..
Posted on May 27, 2010
Your manual above. Hi. if you go to this website above you will find your service and troubleshooting manual as well as other very helpful resources, please use these resources to troubleshoot and hopefully isolate and repair, your unit.
You shouldn't just, "Splice in" a Fan as you see, the temperature controller, uses the resistance of the fan, to calculate the speed and set it correctly. To control the temperature, it is a finely balanced system. What you really need to do, is ADD another FAN in parallel, across the Positive and Negative, connections. Or better still, install a better SINGLE fan, that moves more CFM, than the existing one. This will then allow the system, to operate as it was designed to do. Of course, you could always just use any other 12V DC, supply, and hook that up to a Fan, and let it run "Blind" as we say when it has no Temperature Control. In fact there is NO reason why you couldn't retro-fit a temperature controlled separate Fan, quite apart from the existing one. Use this in conjunction with the existing one, which really should be returned to the way it was.
Posted on May 27, 2010
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Posted on Jan 02, 2017
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