Well I might experiment with a -5 degree trial and then on down to -10 to find an acceptable average temp. I presume it is the defrost cycle which throws a wrench in the works-the reason manual defrost freezers are betterr for long term storage.

So the defrost cycle kicks in and it keeps the temperature above +5F for 5 hours or more?

I'd call and ask to speak with Tech Support to get info on the design specs. You may find it is out of spec. You can return it within the time window.

Tried that Frigidaire does not have technical support. Only Cust Sevice that reads standard stuff to you like don’t leave the door open and is it higher than 80 degrees in your house. Someone at Electroluk knows if this is normal or not. What will the design specs tell me?

Every article I consulted stated that the freezer temperature should not measure the air temperature. Wolf recommends immersing the temperature probe in cooking oil while GE recommends placing it between two packages of food. I would conclude that you should not use the air measurements.

See my original post i did the probe test in a glycol solution still fluctuated

I saw that. But you can't expect the temperature to remain constant and you didn't provide any glycol data.. Your conclusion that the refrigerator wasn't operating properly was based on the air data.

The temp of the glycol solution did not remain steady either. It rose and fell within one degree of the air temperature changes. I just had a new unit delivered and it does the same thing. You can’t expect the glycol not to increase when the air temp goes above 7F and wants to stay there for several hours. I am convinced the compressor is not running long enough due to some set yhreshold to save energy

I bought the GRQ2255BF because of this review.

Frigidaire Gallery Quattro GRQC2255BF French-door refrigerator review - Reviewed

https://www.reviewed.com/refrigerators/content/frigidaire-gallery-quattro-grqc2255bf-refrigerator-review

Again, I don't think it is "malfunctioning" because this is my second one. I think it is by design, but it sounds like a pretty irresponsible design on the part of the engineers if they let the fridge stay above the set point by several degrees over half the time. In other words, 0F does not mean an average of 0F, even for the glycol solution. It means more like an average of 3F. Turning it down further does not change things either.

Also, Fridge is nice and consistent. Freezer is not.

Interesting. Reviewed's results for this refrigerator are consistent with CR's Thermostat Performance ratings of "Excellent" for Frigidaire refrigerators.

So this is my second unit for this model. Costco replaced it last week. See the attached. This does not seem like any think close to consistency. Notice how it stayed well above 10F for several hours .Why did it do this all the sudden after being installed a week ago

Hard time believing I got two faulty units in a row a couple of months apart. Average temp over the past 4 to 5 hours is above 10F. Its like it shutdown for 5 hours

Help! First read my last post from 6 hours ago. This is an update and tge situation is worse. Much worse than my first unit. The temp in the freeezer has now risen to over 20F. See attached. It stayed at these high temps all night. This to me is now not a by design thing but a failure. No visible ice and nothing blocking anything.

I unplugged this thing for 10 min then started it up again at -2F. it has done a good job over the past 48 hrs with no significant spikes over 5F. So what gives? why the spike a couple of days ago to over 20F for more than 12 hours???? I like the quality feel of this unit, but this freezer temp has me concerned

I have the exact same model (grqc2255bf) and I have been fighting this issue for a year now. I am currently on my 3rd compressor (warranty fix). The service was completed yesterday, and within an hour or so the freezer section was down to almost 0 F. Four hours later, the freezer was at 50 F and stayed at that temperature for 6-7 hours. This morning it was back to around 0 F and has not coded a H1 alarm yet today. I am so frustrated with this refrigerator and I have not been able to use the freezer section since August with wild fluctuations into the 40/50 F range - ugh.