TampaSteve
2018/2019 Unity CB
Edit: my frost problem is only in the main compartment. The freezer has none.
I'm pretty sure it's not the ITC. Not certain, but if you remember performance in my garage was not like yours before I installed the ITC. US isotherm tech support told me it won't run well empty, which makes sense. It needs a mass of cold items to help maintain tempature when the door is opened.
I had to run the thermostat way higher than you to achieve the same result.
When I installed the ITC performance seemed the same.
But as you know nothing is ever really tested until you do a live run. This is only my third short trip since installed and each time I'm becoming a bit more dissatisfied with the performance, especially the gigantic frost iceberg. I had to defrost on the 4th day.
I'm certain no air is escaping where I drilled the hole it's full of silicone.
The door seals seem reasonably snug and somewhat present friction to a dollar bill.
The main door is quite right and takes a good pull to open.
Oddly my time to initially cool the fridge is not much different than yours a few hours.
So I'm a bit at a loss why the performance is so bad.
I'm pretty sure it's not the ITC. Not certain, but if you remember performance in my garage was not like yours before I installed the ITC. US isotherm tech support told me it won't run well empty, which makes sense. It needs a mass of cold items to help maintain tempature when the door is opened.
I had to run the thermostat way higher than you to achieve the same result.
When I installed the ITC performance seemed the same.
But as you know nothing is ever really tested until you do a live run. This is only my third short trip since installed and each time I'm becoming a bit more dissatisfied with the performance, especially the gigantic frost iceberg. I had to defrost on the 4th day.
I'm certain no air is escaping where I drilled the hole it's full of silicone.
The door seals seem reasonably snug and somewhat present friction to a dollar bill.
The main door is quite right and takes a good pull to open.
Oddly my time to initially cool the fridge is not much different than yours a few hours.
So I'm a bit at a loss why the performance is so bad.
The only thing that was different about our Isotherm 219 installs is that I didn't add the temperature controller like you did. Installing that required drilling a hole into the refrigerator box to add the temperature controller sensor inside. Maybe there is warm air leaking in some how. I don't get any frost in my refrigerator area and only small amounts in the freezer but not for a couple of weeks into a trip. In fact I've never had to defrost once on a trip yet. It sounds like warm air is coming in either through the seal or the temperature sensor hole. You might want to check the door seal and make sure it's good. If you can't find any leaks then possibly adding some internal circulation fans would help. I hate to even suggest this, but removing the temperature controller maybe the best thing to do. I keep my setting at about 3.25 and my door temperature is 41°, but the interior temperature ranges from 32° on the back wall to 38° at the front of the shelf. In fact I still find some food items just starting to freeze when I go to use them. If anything sits on the back wall it will freeze solid, even more than on gallon of milk/juices. My compressor runs less than 4 times per hour, particularly at night. It may only run once an hour through the night. I guess a lesson s learned is try the stock Isotherm before you think about adding the digital temperature controller.
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