Frigidaire Refrigerator HI Code: Clear High Temp Alert
Quick Answer
A Frigidaire HI code means your freezer temperature is too warm, usually exceeding 26 degrees. This is often caused by a door left ajar, dirty condenser coils, or a recent power outage. Press the Alarm Reset or Mute button to acknowledge the alert while the unit cools back down.
Most of the time when I see a HI code, nobody's in serious trouble. But ignore it long enough and you'll find thawed meat and a very upset family. The scary part isn't the code itself, it's what happens if the underlying cause doesn't get fixed. Usually it's dirty coils or a bad door seal, and both of those are basically free fixes if you catch them early enough.
OK so this isn't some cryptic component failure. It's basically the fridge telling you the freezer got too warm. Could've been a door left cracked, a power blip, or coils that haven't been cleaned since forever. I see this code probably twice a week and honestly, most of the time the fix takes less than 15 minutes and costs nothing.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Door ajar or bad seal45%
Dirty condenser coils25%
Evaporator fan failure15%
Defrost system fault10%
Power outage5%
Symptoms You May Notice
The alarm's beeping and the display is flashing HI, sometimes alternating with the actual temperature reading
Your ice cream has gone soft or has a grainy, refrozen texture from partially thawing and freezing back up
There's a solid sheet of frost on the back wall of the freezer that built up way thicker than normal
Ice cubes are all stuck together in one big clump in the tray instead of sitting loose and separate
The door gasket feels warm or damp to the touch, and you can see condensation forming on the outside of the freezer door
Can you reset a Frigidaire refrigerator to clear the HI code?
Press the Alarm Reset or Mute button once on the control panel. If your model has a digital display with icons, tap the bell or alarm icon. The HI code should clear and the actual temperature should show back up on screen. If it doesn't clear right away, unplug the fridge for 5 minutes, plug it back in, and let it run for 30 minutes before checking again.
Tools Required for Diagnosis
Phillips #2 screwdriverAppliance coil brush (long flexible type)Vacuum cleaner with hose attachmentAppliance thermometer (dial or digital)MultimeterFlashlight or headlampDollar bill (for door seal test)
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
ComponentComponent Under Test
Expected Range5000–16000 ohms
ConditionIf Open (OL) or infinite, replace component.
Frequently Asked Questions
Will the HI code go away on its own?
On most modern Frigidaire models, it won't go away on its own. It'll keep flashing until you press the Alarm Reset or Mute button. Even if the freezer's already cooled back down to zero degrees, the board wants you to know a temperature excursion happened so you can check your food. It's basically the fridge saying 'hey, something happened while you weren't looking.' Press the button and it clears. Simple as that.
How long does it take for the HI code to clear after a repair?
Once you've fixed the root cause, it usually takes 2-4 hours for the freezer to drop back below that 26 degree threshold. But honestly I always tell people to wait a full 24 hours before they assume everything's back to normal. The fridge needs time to pull down the temperature evenly through the whole cabinet, especially if there's a lot of food in there that warmed up a bit. Put a thermometer in there and just check it the next morning.
Can a power outage cause the HI code?
Yeah, absolutely. If power was out for more than an hour, the freezer's going to warm up naturally, it doesn't have any way around that. When power comes back on, the board detects the elevated temperature and fires off the alarm. Nothing's broken in that situation. Just press the reset button, let the unit run, and it'll cool back down on its own. I'd still check your food though. Anything that's been above 40°F for 2 or more hours is in the danger zone.
What if the HI code is on but the freezer feels cold?
That's usually a thermistor issue. The thermistor's the little sensor that reads the temperature and sends a voltage signal to the board. If it's reading wrong, the board thinks it's warm even when it isn't. You can test it with a multimeter: at room temp it should read somewhere around 5,000-16,000 ohms depending on the model. If you're getting way outside that range or seeing an open circuit reading, that's your bad sensor. They're usually $15-25 and pretty easy to replace.
Is the HI code serious enough to call a repair tech?
Most of the time, no. Dirty coils and bad door seals cover probably 70% of all HI codes I see, and both of those are DIY fixes that cost basically nothing. Where you really need a tech is if the code keeps coming back after you've cleaned everything and checked the door seal, or if the unit just can't get cold even with everything looking fine. That points to refrigerant loss, a sealed system issue, or a compressor that's dying, and those jobs need recovery equipment and EPA certification. Not a weekend project.
Models Known to Experience HI Errors
This repair applies to most Frigidaire refrigerators with this error code. Common model numbers include: