Frost and ice · Denver
Why does the frost come back a week after I clear it?
The short answer
Because clearing frost removes the ice, not the reason it formed. A week is a short enough return to say the cabinet is making water faster than it can shift it. Sub-Zero Appliance Repair Denver reads that interval as a diagnosis — (303) 729-0972.
$89 service call, credited against the repair.
Before you call
- Write down the date you cleared it and the date the frost was visible again. That gap is the useful number.
- Note where it came back first — the rear panel, the front edge, the floor, or evenly over the food.
- Check the seal all the way round again, including the bottom corners, which is where a flattened run hides.
- Make sure nothing has changed in how the cabinet is loaded or how often the door is standing open.
Stop here and call Sub-Zero Appliance Repair Denver on (303) 729-0972 once you have cleared it twice and it has come back both times.
What it usually turns out to be
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A defrost heater or sensor
The return is regular to within a day or two, which is what a cycle that never runs properly looks like from outside.
Defrost heater, thermostat or sensor$280–$680
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A drain that refills
Frost is worst low down and on the floor, because the melt happens on time and then has nowhere to go.
Quoted after the diagnosis
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A seal letting air in
The return interval moves with the weather and with how busy the kitchen is, instead of repeating to the same count of days.
Door gasket or seal replacement$260–$700
When it is worth a visit
A second identical return is the point to book. The interval, where the frost lands and whether it changes with use are the three things worth bringing to the call, and all three come from watching the cabinet rather than from the ice itself.
There is a longer version of this one in the guides: read it through.
Treat the clearing as a test
Defrosting on purpose turns a vague complaint into something measurable. Clear it completely, dry it, note the day, and then leave the cabinet alone. Whatever happens next is evidence: the same interval twice over points inside the machine, while a longer gap each time points at how the door is being used.
Follow-up questions
Does a manual defrost fix anything?
It resets the cabinet to a known state, which is useful, and it is worth doing while you wait. What it cannot do is change a heater that is not heating, a sensor that is not asking or a drain that is not draining, so the ice comes back.
Why does the interval matter so much?
Because it separates a fault from a habit. A cabinet that frosts on a fixed rhythm whatever the household does has something wrong inside it. One that frosts faster in a busy week, or after a party, is telling you about the door rather than the defrost circuit.
Should I keep defrosting it in the meantime?
Yes, if the frost is stopping a drawer closing or crowding the food, and dry it out properly each time. Ring Sub-Zero Appliance Repair Denver on (303) 729-0972 with the dates rather than waiting for something worse; a frost that returns weekly does not settle down on its own.
Talk to someone
Still doing it after the checks?
Say what changed and in what order, and the technician packs for that fault rather than for a guess. Technicians work 8:00 am to 8:00 pm, any day of the week, and the line takes a call 24/7.