Upright Freezer blowing warm air

Refrigerator & Freezer Repair
1

I noticed the freezer was 85 degrees inside. The light is on. The fan is running. The compressor gets warm and is running from what I can tell but only warm air is blowing in the unit. I replaced the defrost thermostat just because that seems to be the most replaced/ordered part :stuck_out_tongue: but that didnā€™t change anything. The compressor relay isnā€™t making that clicking sound and I removed it and it does not sound like some of the broken ones sound Iā€™ve seen in videos. I have a cheap multimeter but donā€™t really know how to use it. What should I be checking for next?

2

Here are your parts
Parts for Frigidaire FFU1764FW5 Freezer - AppliancePartsPros.com

Here is the tech sheet.
http://manuals.frigidaire.com/prodinfo_pdf/StCloud/297082201.pdf

[COLOR=ā€œBlueā€]The light is on.[/COLOR]
If this is the interior light, does it go off when the door switch is closed?

[COLOR=ā€œBlueā€]The compressor gets warm and is running from what I can tell but only warm air is blowing in the unit.[/COLOR]
I am assuming that you felt the compressor and it is vibrating.
If yes and you have no cooling at all then it is a sealed system problem. his will be an expensive repair and often it makes more sense to put the dollars towards a new unit.
I am assuming that the compressor runs all the time except when it goes through a defrost cycle which occurs every 12 hours or so and lasts 30 minutes.

[COLOR=ā€œBlueā€] I replaced the defrost thermostat just because that seems to be the most replaced/ordered part but that didnā€™t change anything.[/COLOR]
Even if you had a defrost problem (evaporator clogged solid with ice/frost) the fan would still blow cold air. It just would not be cold enough to cool down the freezer compartment enough.

[COLOR=ā€œBlueā€]The compressor relay isnā€™t making that clicking sound and I removed it and it does not sound like some of the broken ones sound Iā€™ve seen in videos.[/COLOR]
If the compressor gets warm and is vibrating then it is running so the problem is not the start relay.

[COLOR=ā€œBlueā€]What should I be checking for next?[/COLOR]
You coud check for frost on the evaporator/freezer coils but it sounds to me that the unit hs a sealed system problem.

3

I guess I should mention I have an external digital control t-stat hooked up to this freezer to force it to be between 50-55(F) degrees as I am using it to cellar beer/wine.

Then youā€™re leaning towards it being low on freon meaning it has a leak which pretty much means replace it since itā€™s 8 years old?

4

[COLOR=ā€œBlueā€]Then youā€™re leaning towards it being low on freon meaning it has a leak which pretty much means replace it since itā€™s 8 years old?[/COLOR]
Unfortunately, yes.

5

Could you tell me from this video I made if the compressor relay is giving the numbers itā€™s supposed to be giving?
https://www.youtube.com/watch?v=KLTKLvqjzFY

6

I am not sure as I do not have a wiring diagram for this particular unitā€™s compressor.

If the compressor is running all the time except when the unit goes through a defrost cycle and it is not cooling then it is not a relay problem.

The relay can only cause two problems:

  1. The compressor will not start.

  2. The compressor overheats because the relay does not disconnect the start winding. The compressor then will short cycle as the thermal overload kick in and out.