I have an amana 20 about 25 yrs old starts warming in the freezer

I looked at your wiring diagram. This ice box has automatic defrost controls. That means the temp is regulated by a computer board. Their are some diagnostics you can perform on some of these models.
Your ice box appears to be a midrange control model. Click HERE for a diagnostics video

Amana International bottom mount service manual featuring midrange electronic controls



If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

if you have the settings correct then the cold control(ref setting) is bad. but some older models use a baffling system which confuse some people. the freezer settind turned to the lowest setting make you fridge colder. when you put the freezer on the highest setting it allows less airflow. which in turn keeps ref warmer.

Hi, If your ice maker has stopped making ice then you need to check these things.
The lever that controls the ice maker has been pushed up which turns it off. If you have a red lever, pull it down to the wire and if you just have a wire then just pull down the wire to start your ice maker up.
Make sure the freezer temperature is below 10 degrees F If the freezer is too warm ice production will be poor because the ice maker will not cycle properly.
The ice maker fill tube may have ice formed in it, blocking it. Use a hair dryer to melt the ice. Watch out for the plastic parts, so that you do not melt the plastic. Also check the water inlet valve and the shut off valve, to make sure it is not plugged with debris. The openings in those valves are very small.
Check the gears in the ice makers to see if they are broken or stripped. Also look to see if the ice rake is broken. All parts in the ice maker are replaceable individually, If you find broken parts replace them.

Take care

Hi,

Check out these tips...they can help you figure out whats going wrong with yourrefrigerator and why it is not cooling

Refrigerator not Cooling or Fridge not Cooling

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Refrigerator or Freezer not Cooling or Getting Cold
heatman101

gf

Hi
Firstly put off the refrigerator before the compressor burns off.
The problem is simple... the coling gas has leaked out.... put new coolong gas...BUT only after finding the place of leak... this will be needed to be fixed first.
Regards
Berry

Is the freezer cold enough? Should be close to 10 degrees.
Is there water or ice in the ice mold? If not put water in it and see if it dumps the ice after it’s frozen. If there is ice, lift the cut off arm and let it drop to see if it will start.
If it does dump the ice but don’t refill with water.
Try swapping the wires on the dual water inlet valve. Then try the water dispenser. The water should go to the ice maker. This will tell you weather or not the ice maker valve is working and if the line is clear.

do you see alot of frost on the rear panel of the frzer if so it has failed to defrost and repair is req or do a manual defrost until a tech can get to you if no frost sorry sounds like you have a weak tired compressor or leak of freon and being 30 yrs old it is not cost effective to repair this item....

maybe too much water going in to the ice maker

Unless someone has made a water level adjustment there is,
Only one repair. Replace the ice maker.
If someone has made a water level adjustment you can try this.
Remove the ice maker plastic cover. Locate the water level screw adjust it to a minimum setting and try it there.
If that does not correct the problem, replace the ice maker.

I would be calling the store from where it was purchased it should be under warranty. If the ice maker is not working the freezer is not getting down to proper temp. therefor the refrigerator does not cool because all cooling takes place in the freezer, there is a damper between the refrigerator and freezer that allows air through cooling the refrigeration section. Look for ice on the back wall, of the freezer section, If present then the defrost cycle is not working. The evap.coil is icing up and there is no air blowing into the refrigerator. This is the most common problem.