01Defrost System
Defrost Sensor or Thermostat Replacement Cost
Parts and labour, this repair
$270–$610
Defrost heater, thermostat or sensor
The heater that clears the evaporator, and the sensor or thermostat that tells the control when to run it. They fail separately, and they are reached through the same rear panel.
The visit itself is $89, and that comes off the repair the moment you say go. Everything above is the work that follows, on your cabinet, agreed as one figure first.
What is included
- The coil brought back to temperature first, since a frozen reading means nothing
- Both parts in the circuit metered, so the one that failed is the one that changes
- The sensing element, its mount and the plug it sits on
- One full cycle observed afterwards, with the panel still off
What changes the price
- How much ice has to melt before the mount is reachable at all
- Whether the heater is renewed alongside it, which many visits end up doing
- Freezer drawers, where the stack and its runners come out ahead of the panel
What this part actually does
A defrost circuit holds three roles: something to melt the ice, something to sense when it has gone, and something to decide. This page is the middle one. It sits against the coil so that it feels the metal rather than the air, and its entire contribution is a yes or a no.
Which design is fitted differs from cabinet to cabinet, so nothing is ordered off a description given on the phone. The model is read on site and the part follows from it.
Why guessing costs a second visit
Swap the heater on a hunch and the freezer will defrost once, because the panel was open and the coil was thawed by hand while the work was done. Three weeks later the ice is back, the cause has not moved, and the visit gets paid for twice. Metering both parts while the panel is already off takes minutes, which is why it is in the list above rather than offered as an extra.
Where this goes next
The symptom worth reading first isa freezer that warms once a day, because a healthy cycle looks similar.
Where both parts meter good, what is left upstream isthe control board, priced higher.
Which of the three it is comes out ofthe flat diagnosis.
Asked before the visit
Is the sensor cheaper than the heater?
They sit in one band, so the printed range covers either. What moves the figure is access rather than the part: the same panel comes off, the same ice has to melt, and the labour is what it is. A visit that names the wrong one, though, costs a second trip.
Should both parts be replaced at once?
Often, and it is worth asking. Once the coil is thawed and the panel is off, adding the second part costs parts rather than another hour of labour. Sub-Zero Repair Experts Los Angeles will say on the day whether that is sensible for your cabinet — (310) 496-3358.
Afterwards
What people said once the kitchen was back together
Built-in Sub-Zero calls on both sides of the pass.
Owners on this route5.0/ 51,734 reviews
September in the valley hit triple digits and the unit ran without ever satisfying. The condenser was matted with dust off the hillside. Cleaned properly, gauges checked, and it rests between cycles again.
Cormac D.Studio City
Bottles on the lower rack were warm to the hand while the display insisted everything was fine, which is how it went unnoticed for weeks. The interior fan had died and the sensor sat in the wrong pocket. Both put right in one call.
Delphine H.Los Feliz
The maker in our back bar quit completely and the reset in the booklet did nothing. He checked the supply, found the module seized, and changed it out.
Hana L.Silver Lake
Defrost sensor, quoted before it is started
Tell us what the freezer is doing and you will hear which band it lands in. Phone answered 24/7.