Sub-Zero 50 U 87: no water flow detected
On Classic (BI) built-in models, 50 U 87 means the water flow meter did not detect any flow.
Mon–Sat, 8am–8pm
- Water supply and fill
- Ice maker water inlet valve repair
- Source: Sub-Zero
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What 50 U 87
actually means.
On Classic (BI) built-in models, 50 U 87 means the water flow meter did not detect any flow. Sub-Zero's first suspect is house water pressure, since a recent pressure drop can bring the code on; without flow the ice maker cannot fill.
Sub-Zero ice maker display · also shown as 50-U-87, 50U87
What to do when 50 U 87 shows on the ice makerKind of codeWater supply and fill
The ice maker asked for water and got too little, too slowly or none at all, or water kept arriving after the fill should have ended. A closed shutoff, a kinked line, a clogged filter and low house pressure are ruled out before the water inlet valve is replaced or the fill tube is thawed. If water is on the floor, close the supply valve before reading anything on the display.
Usually leads toIce maker water inlet valve repair
The electric valve that lets water into the ice maker, tested and replaced when it will not open, opens only partway, or keeps dripping after it should have closed.
Shows up asNo Ice Coming From the Ice Maker
The mold sits empty or holds one frozen batch that never drops, the bin stays bare for days, and the dispenser gives water as usual: an ice maker not making ice while the rest of the appliance carries on normally.
MakeSub-Zero
Sub-Zero ice maker service, for ice makers in built-in units and those under the counter.
SourceSub-Zero answer: Classic built-in error code 50 U 87
Sub-Zero Classic (BI) built-in models with a water flow meter.
Before you book,
in this order.
Each step comes from Sub-Zero's own guidance for 50 U 87 on its ice makers. Follow it to the end: the last card says whether this is a visit.
Confirm water pressure in the house is normal and that the shutoff valve to the unit is open.
Switch the unit's home breaker off for 30 seconds and back on.
Book a visit if 50 U 87 returns with water pressure confirmed.
Still there?
It usually turns into ice maker water inlet valve repair. Book with the code and the model number.
What not to do
50 U 87 does not by itself mean the ice maker is broken. It says water never arrived, so the supply comes first.
What you may
notice with it.
The ice maker problems 50 U 87 tends to arrive with. Answer these at the ice maker before anyone is booked.
All problems
Where 50 U 87 usually leads
Ice maker water inlet valve repair.
Sub-Zero
ice makers.
Sub-Zero ice maker service, for ice makers in built-in units and those under the counter.
Sub-Zero ice maker repairMore Sub-Zero codes
All 15 Sub-Zero codesWater supply and fill on other makes
Door ice maker
The ice maker that feeds the dispenser on the outside of a door: tucked into an insulated box in the left door of a French door model, or at the top of the freezer side of a side-by-side, with a chute and an auger carrying cubes to your glass.
Freezer ice maker
The ice maker that sits inside the freezer compartment itself, a tray that twists or a mold with a heater and an ejector, dropping cubes into a bin or drawer you open by hand, with no dispenser on the door.
Undercounter ice maker
A built-in residential ice maker that lives under a kitchen, bar or basement counter, making clear cubes or chewable nugget ice on its own cooling system, with a water line in and a gravity drain or a small drain pump out.
In Sub-Zero's own words
Water flow meter did not detect flow
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Sub-Zero Classic (BI) built-in models with a water flow meter.
Sub-Zero 50 U 87 ice maker repair,
where we come out.
The same visit in every metro below: the code, the model number, and a diagnosis before any part is ordered.
All service areasTampa BayFL · 31 areas
Miami / South FloridaFL · 47 areas
New York MetroNY · 75 areas
HoustonTX · 36 areas
ChicagoIL · 50 areas
Los AngelesCA · 95 areas
San DiegoCA · 31 areas
Questions
about 50 U 87.
Can I clear 50 U 87 myself?
Can plumbing work in the house trigger 50 U 87 on a Sub-Zero?
How do I check water pressure for my Sub-Zero?
If water pressure is fine, what does 50 U 87 on a Sub-Zero point to?
Back to your everyday
Still showing 50 U 87?
Book with the code or the blink pattern written exactly as the ice maker shows it, the full model number, and whether there is any water on the floor — when there is a code, that is where the diagnosis starts.