Called Monday about our Wolf range — burners were running hot after we moved in. Technician arrived Tuesday with parts already on the truck. Turns out the altitude orifices had been installed wrong by the previous owner. Calibrated on the spot, everything has been precise since. Very professional, explained every step.
Freezers · Column · Drawer · Undercounter
Freezer Repair for Denver's Premium Kitchens
When a built-in freezer stops holding temperature, the clock starts on hundreds of dollars of food. We diagnose column, drawer and undercounter freezers — defrost systems, sealed systems, seals and controls — and get the cold back where it belongs.
A premium built-in freezer fails differently than the standalone unit in a garage, and the repair has to respect that. Column freezers, freezer drawers and undercounter units — the kind Sub-Zero, Wolf and their peers build — run tight electronic control over evaporator temperature, use a scheduled defrost cycle to keep the coil clear, and rely on a magnetic door gasket to hold a hard seal against a heavily insulated cabinet. When one of those systems drifts, the freezer often keeps running while quietly losing the fight to stay cold.
Most of the calls we take split into a few families of fault. A freezer that no longer holds temperature is usually a failed defrost cycle, a struggling sealed system, or airflow choked by frost — three very different repairs that can look identical from the kitchen. A cabinet packed with frost or a sheet of ice on the floor of the drawer points at the defrost heater, defrost timer or termination sensor. And a temperature alarm chirping at 3 a.m. is the control board doing its job: telling you the box has crossed a threshold before the food does. Our first job on site is to separate those causes instead of guessing at a part.
What we repair
The whole cold chain, not just the symptom
We test the defrost circuit, the sealed system and the airflow path before we quote, so you are not paying for a swapped part that leaves the real fault in place.
- Freezers not holding temperature or slowly warming
- Defrost heaters, timers & termination (bimetal) sensors
- Heavy frost or ice buildup on the evaporator coil
- Sealed-system faults — compressor, start relay, refrigerant leaks
- Evaporator & condenser fan motors that have stalled
- Worn or torn magnetic door gaskets breaking the seal
- Temperature alarms, error codes & control-board faults
- Iced-over drawer glides and frozen-shut freezer drawers
Sound familiar?
Freezer symptoms we clear
Won't hold temperatureFrost packed insideIce on drawer floorTemperature alarm soundingCompressor runs nonstopDoor won't sealFan buzzing or silentFood starting to soften
Not holding temperature
Defrost fault or sealed system?
When a freezer warms up, the split we have to make first is defrost versus sealed system — because a wrong guess here is the most expensive mistake in the trade. A defrost failure lets frost bury the evaporator coil until air can no longer move across it: the compressor runs and runs, the cabinet climbs, and you often find a solid block of ice behind the rear panel. We test the defrost heater's continuity, the timer or adaptive-defrost control, and the termination sensor to find which link broke. A sealed-system fault — a tired compressor, a failed start relay, or a slow refrigerant leak — shows a clean coil that simply never gets cold enough, and it demands a very different repair. We read suction behavior and temperatures at the coil to tell them apart before a single part comes off the van.
How the visit goes
From warm box to holding temp
01
Confirm the unit
Column, drawer or undercounter — plus brand, model and serial, so we arrive with the right defrost heater, sensor, fan or gasket.
02
Diagnose the cold chain
We check defrost continuity, evaporator airflow, fan operation, door seal and sealed-system temperatures before naming a part.
03
Repair with factory-grade parts
Heaters, sensors, control boards, fan motors and gaskets fitted to spec — no universal substitutes that fail the next winter.
04
Verify the pulldown
We run the unit through a cooling cycle and confirm it reaches and holds setpoint, then check the door seal and alarm behavior before we leave.
Good to know
Straight answers about freezer repair
Good to know
Straight answers about freezer repair
Direct answer
Who repairs built-in and Sub-Zero freezers in Denver?
Denver Wolf Repair is an independent service company covering the Denver metro and Front Range, with factory-trained technicians who work on column, drawer and undercounter freezers across premium brands including Sub-Zero, Wolf, Viking and Thermador. We are not an authorized manufacturer service center, which keeps us flexible on scheduling and pricing. Call (720) 790-9436, answered 24/7.
Direct answer
Why is my freezer full of frost but the food is thawing?
That combination almost always points at a failed defrost cycle: frost keeps building on the evaporator coil until air can no longer circulate, so the cabinet warms even while ice piles up. The usual causes are a burned-out defrost heater, a stuck defrost timer or adaptive control, or a failed termination sensor. We test all three on site rather than replacing parts on a hunch.
Direct answer
How fast can you get a freezer repaired before the food spoils?
We offer same-day and next-day availability across Denver, and our vans carry the common defrost, fan and control parts, so many freezer repairs finish in one visit. Service is performed daily from 8am to 6pm, and the phone is answered around the clock so you can start the clock immediately. A flat $89 service call gets a technician diagnosing before the loss grows.
What it runs
Indicative freezer-repair pricing
Freezers vary widely by brand, generation and fault, so these are honest starting points rather than quotes. You always get a firm number before any work begins.
Diagnostic / service callApplied toward the repair if you proceed
$89
Defrost heater or termination-sensor replacement
from $149
Evaporator / condenser fan-motor replacement
from $179
Door gasket replacement & seal correction
from $169
Sealed-system diagnosis & compressor / relay serviceRefrigerant and part cost varies by model
from $289
Every figure above is a starting estimate, not a final quote. Actual pricing is set after an on-site inspection because premium freezers differ dramatically by brand, generation and parts availability, and sealed-system work in particular depends on what we find inside. The $89 service call applies toward the repair if you proceed, and we never charge for work you have not approved.
Freezer FAQ
Freezer questions we hear most
Is it worth repairing a built-in freezer instead of replacing it?
Usually, yes. A column, drawer or undercounter freezer from a premium brand is a several-thousand-dollar cabinet, and the common faults — defrost heaters, sensors, fans and gaskets — are far cheaper to fix than to replace. We will tell you honestly if a unit's sealed system has reached the point where replacement makes more sense.
What should I do the moment my freezer stops staying cold?
Keep the door closed as much as possible to preserve the cold you still have, move anything critical to another freezer if you can, and call us. A full freezer holds temperature far longer than a half-empty one, which buys time until a technician arrives.
My freezer keeps sounding a temperature alarm — is that a real problem?
Treat it as real. The alarm means the control board has measured the cabinet crossing a safe threshold, which is an early warning before food is actually lost. It can be as simple as a door left ajar or a failing gasket, or as involved as a defrost or sealed-system fault, so it is worth a prompt diagnostic.
Do you service ice buildup that keeps a freezer drawer frozen shut?
Yes. A drawer that ices over or refuses to slide is usually a defrost issue, a leaking door seal letting humid air in, or blocked drainage refreezing at the base. We clear the ice, find the source, and correct it so it does not return in a week.
Are you affiliated with Sub-Zero or Wolf?
No. We are an independent company and are not affiliated with, authorized by, or endorsed by Sub-Zero Group, Wolf Appliance, Inc., or any manufacturer. Our technicians are factory-trained and we fit factory-grade parts, but you are hiring an independent shop.
Related repair services
Cold back where
it belongs.
Same-day and next-day freezer diagnostics across Denver Metro. Calls answered 24/7.
Customer reviews
Trusted in Denver kitchens
Recent customer experiences with our appliance repair service.
Our Wolf oven was reading 50 degrees low — we'd been overcompensating for months. The tech tested it, replaced the temp sensor, and re-ran calibration. Baking has been completely different since. Honest diagnostic, fair price, no upselling.
Three igniter clicks on the left burner, then nothing. A different company quoted replacing the entire control board — nearly $900. Denver Wolf Repair diagnosed a faulty igniter module and fixed it for a fraction of that. Trust the specialists.
Wolf dual-fuel range with erratic simmer on the gas side. Technician found the altitude conversion had never been completed by the original installer — corrected it in under an hour. At 5,280 feet this is apparently common. Highly recommend for anyone with a similar setup.
Sub-Zero stopped cooling — called at 7 am, someone was here by 11. Condenser fan, which they had in the van. Groceries were saved. These technicians clearly know this equipment cold.
Wolf range hood stopped capturing smoke. Tech found a failing blower motor, ordered the part and installed it within two days. No upsell attempts, no unnecessary extras. Clean and done right.
Scheduling was easy, tech was on time. Oven door seal was cracked and they replaced it cleanly. Would have given 5 stars but had to wait a few extra days for the part. Otherwise thorough diagnostics and honest about what actually needed fixing.
Control board on our Wolf oven started throwing error codes. I dreaded a huge bill, but the tech walked me through exactly what was wrong before touching anything. Repair was done same visit. Professional from first call to sign-off.