Door alarm and hi temp alarm as soon as I open the door. Temp inside is normal. Frigidaire upright freezer purchased in 1993

The light may be staying on and creating heat, or the unit thinks the door is still open.

Or the door seal is worn and is letting cold out.

Or

It needs gas.

Have you put a thermometer inside to check the temperature? It should be 0'F +/- 2'.

https://www.google.com/search?q=Kenmore+upright+freezer.+The+alarm+keeps+going+off

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The manual for this unit can be found here.

Check the owners manual, it may only be a high temperature alert that will go away once it cools inside.

https://www.frigidaire.com/Kitchen-Appliances/Freezers/Upright-Freezer/

High Temp Alert If the temperature inside the cabinet exceeds 21°F (-6°C), the LED light at the bottom of the cabinet will flash and the alarm will sound. The alarm can be reset by opening and then closing the door. The LED will continue to flash until the cabinet temperature is below 21°F (-6°C).

It is a warning that the fridge thinks the defrost heater is bad

Frigidaire side by side Model Ffhs2622msu Flashing H on the... H means that the refrigerator thinks the heater is bad. You'll need to pull everything out of the freezer and remove the back panel inside the freezer. You'll see the silver evaporator coils with the evaporator fan above it.
Apr. 14, 2020

What does flashing h mean on Frigidaire refrigerator?

Fridge keeps beeping or buzzing: The following is for Frigidaire models but others can be addressed similarly.

Several Frigidaire refrigerator models have an electronic control panel on the freezer door the owner can use to adjust the internal temperature, dispense ice and water and receive notification about issues such as the need to replace a water filter. The refrigerators also emit a beep for various actions and as an occasional alarm. Determining what causes the beeps necessitates some troubleshooting.
Temperature Controls ·A Frigidaire refrigerator's display panel blinks when the control panel is touched to set temperature controls. After pressing "Freezer Temp" or "Refrigerator Temp" on the keypad, press the arrow buttons within five seconds to increase or decrease the desired temperature. If you do not press the arrow buttons within five seconds after pressing "Freezer Temp" or "Refrigerator Temp" on the keypad, the refrigerator beeps to indicate the current setting will stay in place.

Door Open ·When you leave the refrigerator or freezer door open, the refrigerator beeps. Also, the "Door Ajar" indicator illuminates on the appliance's display panel. Shutting the door and pressing "Alarm Reset" stops the beeping and turns off the "Door Ajar" indicator light.
·The Frigidaire refrigerator has a control lock feature that prevents use of its control panel or dispensers when the unit is locked. When the control lock is active, a beep sounds when a keypad or dispenser is pressed. Release the control lock by pressing the "Control Lock" icon for three seconds. A beep will sound, and the icon's light will go out.
Power Reset ·A power reset is occasionally necessary if the Frigidaire refrigerator's control panel does not work normally or a reset function on the keypad does not work. A power reset involves disconnecting power to the refrigerator by unplugging its power cord from the electrical outlet, waiting 30 seconds and plugging the power cord back into the electrical outlet. When the control panel resets, a beep sounds. If the refrigerator beeps even after a power reset and the beeps' source is not known, contact Frigidaire.


Read more :http://www.ehow.com/info_12148688_cause-beeping-noise-frigidaire-refrigerator.
Cause of Beeping Noise in Frigidaire Refrigerator eHow

the warming up will be because the unit is not operational and the door hasn't been opened
call a service technician and check for a failed start/run capacitor for the compressor
the high temp alarm indicates that the food is in danger of spoiling

Control board is miscommunicating with the rest of your unit. Contact a professional.

kenmore elite, alarm kept going on and b flashed on and off. I finaly figured out on bottom of freezer there is a battery door open it and change 9v. thats it,

Sounds like frost bulidup from door being left open warm air gets in making frost and ice. Need to turn off for 24hrs or so to let all the ice melt compleatey then turn back on keep door closed run for 24hrs check Temp. shoud be about 0 to -5 Deg. if good start using.

you have a refrigeration issue partner let her go 16 yrs. is good service you can replace it for 3 to 5 hundred the repair will be that IF you can find someone with the r-12. don't go for a top it off and go deal the food you lose is to expensive for that to be economical.