Question about Frigidaire Freezers
Model LFFU14F5HWC..freezer runs constantly down to -30 below zero. Checked thermostate (no ice in freezer) with ohm meter and checks ok..No matter what number on control panel, temperature does not change..
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Posted on Jan 02, 2017
SOURCE: Errattic temperatures in Freezer
Check out "victory-refrig.com" for manuals, diagrams, etc.
Cap tube systems are "critical charge systems". Can be difficult to get right. You did not mention pressures that you had. The split on the evap vs.box temp is almost always 10 degrees for freezers. If you want a -10 box, your evap needs to be -20. As a general rule of thumb, you want the high side to be "ambient +30". This seems to work most every time. Your problem might be operations related. Them leaving the door open alot and so on. It could also be a problem with the evap fan or the control to it. It could also be that since there had been a problem with the unit, they are now constantly checking it. Could be checking during a defrost cycle. When your box is at 0 degrees, your pressure should be about a -10 and no less that a -15 degree for the evap. You may have to babysit this thing and see how far it will pull down. You may have a weak compressor. Also, I have had many Hobart freezers fail due to dirty condensers. This causes the oil in cap tube systems to gel and clog up the cap tubes. The only fix is replacing the cap tube. There are alot of variables here so be patient, it's not going to be a quick fix. One last thing, since R404A can fractionate, you really need to pull the charge out and weigh in the correct charge with virgin refrigerant. This will eliminate 2 things. 1, it will ensure the correct amount of refrigerant and, 2 no chance of having a poor mixture of refrigerant in the system causing inconsistant readings and performance.
Hope this helps. And remember, cap tube systems are performance measured by the amount of superheat just prior to the unit making temp and cutting off.
Posted on Mar 07, 2009
Are you sure the compressors are running, it could just be that the fans are starting but the compressor does not start.
It sounds as though you may have fried the boards again.
Remove the top grille and reach in to the compressor, to see if it is running, you should be able to feel it vibrating, there should also be some heat to it, not neccessarily hot.
have you tried putting surge protectors on the outlets, to save the boards in the future?
Posted on Mar 12, 2009
Check for ice build-up in and around the freezer fan where the blades are, if you can see ice in there (some times it may look like white foam but dont be fooled, it will be ice), the fan will be hitting it, defrost the freezer and check defrost element, (you will have to dismantle freezer section to get to it but reletively simple job) disconect from mains first. Good luck
Posted on Dec 19, 2010
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