Quick summary
The Sub-Zero seal, and the rule for replacing it
Sub-Zero replaces a door gasket when it is ripped, torn or cracked. Short of that, cleaning is the remedy, because residue on the sealing face is what stops a magnetic gasket seating. Sub-Zero recommends a service technician complete all door and drawer gasket replacements.
- Sub-Zero replaces a gasket when
- It is ripped, torn or cracked
- Short of that
- Clean the sealing face; residue stops a magnetic gasket seating
- Who should fit it
- A service technician, per Sub-Zero
- Genuine gaskets
- From a Factory Certified Parts Distributor, never online
The Sub-Zero fridge seal test, before you replace anything
A magnetic gasket seats against a steel face. Anything between the two, and in a working kitchen that means grease, crumbs and cleaning residue, holds the seal fractionally open along part of its run. The cabinet then draws humid room air continuously and ices at the back wall, which Sub-Zero names as the first symptom of a faulty gasket.
So the first step is not a part. Clean the sealing face and the channel, close the door and look along the line for daylight. This is the same diagnosis that runs through Sub-Zero refrigerator repair in Manhattan: confirm the cheap cause before quoting the expensive one.
Sub-Zero gasket damage that does justify replacement
Ripped, torn or cracked. Those are the three words Sub-Zero uses, and they describe damage to the material rather than to its behaviour. A gasket that is merely dirty, flattened where the door has stood open, or slow to relax after being closed for a fortnight is not in that category.
Sub-Zero door and drawer gasket fitting
Sub-Zero recommends a service technician complete all door and drawer gasket replacements. The gasket sits in a channel round the inner edge and has to seat evenly along its whole run; a gasket fitted with a twist in it seals worse than the one it replaced.
Where genuine Sub-Zero gaskets come from
A Factory Certified Parts Distributor. Only filters and cleaners are sold online. Sub-Zero states that incompatible or third-party parts mean damage is not covered by the manufacturer warranty, and gaskets are model-specific, so the serial tag decides which one is ordered.
When the seal is sound and the door still lets air in
A gasket can be perfect and still not seal, because it only works if the door closes square onto it. If the hinge has worn or the panel is over its published weight the door drops, and the gasket opens at the top corner no matter how new it is.
That is why a gasket is rarely the whole job in a Manhattan kitchen, where custom panels are the norm. Check the published panel weights before fitting a seal that will fail the same way.
Try this yourself before you call us in Manhattan
Clean the sealing face and the channel, close the door, and look along the line for daylight. Residue is what stops a magnetic gasket seating, and a clean gasket seals like a new one. This costs nothing and settles most of these calls.
Call us if the gasket is ripped, torn or cracked, because Sub-Zero recommends a service technician completes the replacement, or if a sound gasket still ices up, which points at the door rather than the seal. Call (888) 470-3377, seven days a week from 7am to 9pm, or see the areas we cover.
Questions we are asked on these calls
When should a Sub-Zero door gasket be replaced?
When it is ripped, torn or cracked. Sub-Zero is specific about that threshold; short of it, cleaning the sealing face is the remedy.
Why does a clean gasket seal better?
It is a magnetic gasket sealing against a steel face. Residue between the two holds it fractionally open along part of its run, which is enough to let humid room air in continuously.
Can I fit a Sub-Zero gasket myself?
Sub-Zero recommends a service technician complete all door and drawer gasket replacements. The gasket has to seat evenly along its whole run, and one fitted with a twist seals worse than the old one.
Where do genuine Sub-Zero gaskets come from?
A Factory Certified Parts Distributor. Only filters and cleaners are sold online, and Sub-Zero states third-party parts mean damage is not covered by the manufacturer warranty.
My gasket is new and the door still ices up. Why?
The door is probably not closing square onto it. A worn hinge or a custom panel over its published weight drops the door, and the seal opens at the top corner regardless of its condition.
Where to go next
Where to find us
Manhattan Sub-Zero Refrigerator Repair
1334 York Avenue, New York, NY 10021
(888) 470-3377 · service@manhattansubzerorefrigeratorrepair.com
Mon to Sun, 7am to 9pm