Water dispenser not working, slow or dry.
When a Sub-Zero or Monogram dispenser gives no water, the makers’ own steps look for air after a new filter or installation, a lock, Sabbath Mode and a closed supply. When it gives too little, they name the filter, the supply pressure and, at Sub-Zero, calcium in the nozzle. The owner can check all but the pressure.
Hold nothing down for long yet: Sub-Zero’s priming answer stops at 60 seconds a press, and a Classic (BI) locks itself after a gallon in 15 minutes. The three-gallon run in Monogram’s manual is not a step to borrow.
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What Stops the Water?
The makers’ steps differ, down to how long to hold the button; the last column names the source of each row.
| What you see | Sub-Zero | Monogram | Viking VCRB | Whose step | Source |
|---|---|---|---|---|---|
| Dry at first, or after a new filter | Prime: 60 seconds at most per press, 10 between; the first glasses poured away | Cradle held at least 2 minutes; after a new cartridge, 3 gallons | No dispenser | Yours | Sub-Zero priming; Monogram manual pp. 11, 12 |
| Dry, a lock or key icon lit | 685, 695: Light held 5 seconds. Classic (BI) door: the same, or Lock held 3 | LOCK held 3 seconds | No dispenser | Yours | Sub-Zero locks; Monogram manual p. 12 |
| Dry, H2 LO on the display | Classic (BI): a gallon in 15 minutes; unlocks itself after 45 minutes | Not in the manual | No dispenser | Yours | Sub-Zero, H2 LO |
| Dry, the display dim, dark or showing Sabbath | Sabbath Mode disables it on the 600, Classic (BI) and Classic (CL) | Its Sabbath list does not name the dispenser | No dispenser | Yours | Sub-Zero Sabbath; Monogram manual p. 15 |
| Slow, the filter light on or the filter old | Replace the filter | Replace at a red light or a falling flow; test with the bypass plug | No dispenser | Yours | Sub-Zero, too slow; Monogram manual p. 11 |
| Slow with a new filter | Nozzle cleaned of calcium; 20–100 psi on 500 and 600, 20–100 or 35–120 on others | 40–120 psi; the line not restricted | No dispenser | Yours, then a plumber | Sub-Zero pressure; 600-2 manual pp. 8-15, 8-17; Monogram manual pp. 4, 25 |
| Ice maker fills, dispenser dry | Not in the manual or answers | GE: a frozen tank or tubing; set warmer, 24 to 48 hours | No dispenser | Yours; a split tank is service | GE answers |
| Clicking or grinding, no water | Unit off at its button, then on, to restart the valve | Not in the manual | No dispenser | Yours, then service | Sub-Zero, not working |
| Water runs by itself | Power off and on; if it runs on, the water off; service either way | Not in the manual | No dispenser | Service | Sub-Zero, turns on by itself |
The Viking VCRB5301 and VCRB5361 all-refrigerators in the manual we work from list no dispenser, water valve, tank or filter, and we hold no Viking document for a model with one. Some Viking dispenser models are a safety matter: 42- and 48-inch side-by-sides with in-door dispensers made from October 2012 to May 2013 were recalled in November 2013 because wiring connectors can overheat, and the CPSC says to turn one off, unplug it and contact Viking for a free in-home repair. On a Sub-Zero the series decides every row: find your model number.
Where does the water go before the glass?
GE’s 2002 service guide for the Monogram ZIS side-by-side traces the whole route. A plastic line runs from under the unit, up the back to the machine compartment at the top, through the water filter to the water valve. Two low-pressure lines leave the valve: one to the ice maker, the other down the back and under the unit to a cold water tank in the fresh-food compartment, and from there into the freezer door and the dispenser.
Sub-Zero names the pieces. The shut-off valve is on the supply line, fitted by a plumber, not on the unit. Classic, PRO and Designer dispenser models filter the water; the 500, 600 and 700 Series have no filter. On a 600 or a Classic the dispenser draws on the water side of a dual water valve, and its tank holds 50 ounces on a 500 or 600, 40 on a Classic, 32 on a Designer.
Only some models have a dispenser, and Sub-Zero says one cannot be added later: in its 600-2 manual, the 685 and 695 side-by-sides; in its answers, also the 590, 680 and 690, Classic models such as the BI-48SD and BI-48SID, and twelve Designer models ending in RID or CIID. Both makers feed the ice maker from the same supply, so an ice maker that still fills narrows the search. The ice maker’s side of the same line.
Why Is It Dry After a Filter Change?
Air. Sub-Zero’s priming answer, for first use and after a filter change, says some may come out before the water and calls it normal; Monogram’s manual lists trapped air among the reasons a dispenser does not work.
- 01
A Sub-Zero Classic (BI) with a door dispenser
Water held no more than 60 seconds; past that, it locks out. No water yet: wait 10 seconds and press again. After a filter change on a Classic (BI), Sub-Zero asks for several glasses over two minutes, to clear the air.
- 02
A Classic with an internal dispenser, or a Designer
A glass pressed against it until water flows; none within 60 seconds, and the glass comes away for 10 seconds before the next press. Once the tank is full, pour away the first few glasses, which Sub-Zero says may carry impurities from new plumbing.
- 03
A 600 Series
There is no filter to change. On first use or a new installation, Sub-Zero’s step is a five-minute wait, then the water key pressed for 60 seconds.
- 04
A Monogram
The new cartridge filled with tap water before it goes in, then 3 gallons, about six minutes, run through the dispenser to clear the system and stop the sputtering. On a new installation, the cradle held at least two minutes and the first gallon poured away.
Then reset the filter light: Monogram’s RESET WATER FILTER pad, held three seconds, and the Classic’s button, on the filter page. The same priming follows a new filter after a summer away.
Is It Switched Off on Purpose?
A dispenser can be told to stop in four ways, none of them a fault.
- 01
Sabbath Mode
Sub-Zero’s 600 Series, Classic (BI) and Classic (CL) disable the dispenser in Sabbath Mode, with the ice maker and the door alarm, and go back to it after a power failure. The current manual for Monogram’s built-in side-by-sides lists the display, door alarms, lights and ice maker as disabled in Sabbath Mode, says the appliance will not respond to your actions, and does not name the dispenser. How to tell Sabbath Mode, and leave it, series by series.
- 02
A lock
On the 685 and 695, Light held five seconds locks every button and lights a key icon; five more seconds unlock them. Classic (BI) door dispensers do the same, or use a Lock button held three seconds, and a Classic (CL) locks with a press and hold; the 590, 680, 690 and Classic (BI) internal dispensers have no lock. A Monogram locks and unlocks with LOCK held three seconds. A Sub-Zero lock that will not release: the breaker off for 30 seconds.
- 03
H2 LO, on a Classic (BI)
A gallon within 15 minutes, or the valve open 150 seconds, and a Classic (BI) locks its dispenser, a safety feature, Sub-Zero says, against a stuck key flooding the home. It unlocks after 45 minutes; sooner with Light held five seconds on the BI-42SD and BI-48SD, or the Water key pressed firmly five times in 20 seconds on the internal dispensers. Two beeps: unlocked.
- 04
Turned off, on a Designer
A Designer (IT, IC) dispenser can be turned off on its own: the cup icon in the options menu before serial 5959000, the Sub-Zero Group Owner’s App from it on. A Classic (BI), 500 or 600 cannot: its dispenser stops only with the water, and the ice maker with it.
Why is the flow so slow?
Sub-Zero starts with the filter: if the replacement icon shows, replace it. Another of its answers explains why: as a filter loads with what it removes, the pressure through it falls. Monogram’s manual says to replace the cartridge when its light turns red, or when the flow to the dispenser or ice maker decreases.
To test the filter, take it out of the path: GE’s bypass plug goes in place of the cartridge, and if the flow improves, the filter was clogged. Monogram gives the plug free, and its ice maker will not run without filter or plug; on a Sub-Zero Classic with a twist-in filter, removing the cartridge is the bypass. GE’s timed check, which it calls general guidance: dispense into a measuring cup for 20 seconds; under 8 ounces, the flow is probably inadequate.
Past the filter is the supply, which Sub-Zero leaves to a plumber, with no tool or procedure of its own to measure it. It asks for a steady 20 to 100 psi on all 500 and 600 Series models, the range its 600-2 manual gives technicians, and 20 to 100 or 35 to 120 on others, by model; Monogram asks for 40 to 120 psi. Behind a reverse osmosis system, both makers want the refrigerator’s own filter bypassed.
Last, the nozzle: Sub-Zero says sediment or calcium can affect the water’s path, to be cleaned gently with a toothbrush or a toothpick. And some slowness is the house: the flow, it adds, depends on the pressure and on how much water is in use in the home. What the valley’s water carries.
Ice, but no water: a frozen tank?
When the ice maker still fills and only the dispenser is dry, GE’s general answers look at the water tank or its tubing, frozen by a control set colder than the owner’s manual recommends or by a light food load. The remedy is a warmer setting and 24 to 48 hours. A tank that froze is often split, GE warns, leaking onto the fresh-food floor, and replacing it is service.
On current Monogram side-by-sides the tank sits behind a cover above the Climate Control drawer. None of the Sub-Zero answers cited here mentions a frozen tank. Water that is only cool is another matter: Monogram calls a warmer first glass normal.
The Makers’ Own Tests
Past the owner’s checks, the makers publish three tests of their own.
- 01
Restart the valve
If the dispenser clicks or grinds and gives nothing, Sub-Zero’s answers for the 600 Series and both Classic lines say the water side of the dual water valve may need a restart: the unit off at its own on/off button, back on, and a retry.
- 02
Try the other door
On Classic French door models with an internal dispenser, Sub-Zero asks for the door light switches to be checked. On a Classic (BI), a dispenser that works only with the right-hand door open may mean the left-hand switch has failed; on a Classic (CL), the reverse.
- 03
The communication tests
GE’s service guide gives the Monogram ZIS a diagnostic mode, entered from the temperature pads. Test 3 checks the link between the temperature control and the dispenser, test 4 the link between the dispenser and the main control board: P for a pass, F for a problem. It is a technician’s mode.
When is it a visit?
When it is still dry or slow after the priming, the locks, a new filter or the plug, and a plumber’s check of the supply: there, both makers’ answers end in service. What remains is inside: the valve, the tank and its lines, a switch, a control. A dispenser that runs by itself is a visit even if it stops, Sub-Zero says; if it keeps running, close the supply. Where the shut-off valve hides.
The visit is $119, waived in full when you go ahead with the repair, and the work is a fixed price approved before any repair begins. What we repair on a Sub-Zero · on a Monogram · on the ice maker that shares the line.
Call (478) 888-2999, every day, 7am–6pm, and tell us the make and what happened.
Questions
Why is my Sub-Zero water dispenser not working?
Sub-Zero’s own steps: after an installation or a filter change, prime the tank in presses of no more than 60 seconds, 10 seconds apart; check that the dispenser is not locked and the unit is not in Sabbath Mode; on a Classic (BI), H2 LO means it locked itself after a gallon in 15 minutes. A Designer (IT, IC) dispenser can be switched off. A clicking valve restarts when the unit is switched off and on.
Why is my Monogram water dispenser slow?
Monogram’s manual ties falling flow to the filter: replace the cartridge when its light turns red or the flow decreases, or fit the free bypass plug in its place to test it. Its troubleshooting table adds a supply line restricted or not connected, and the supply must be 40 to 120 psi. GE’s general check: under 8 ounces in 20 seconds into a measuring cup, the flow is probably inadequate.
Why is there no water from the dispenser after a filter change?
Air, by both makers’ accounts: Sub-Zero says some may come out before the water after a new filter, and GE that it may be trapped. Sub-Zero’s priming answer uses presses of up to 60 seconds, the point at which those dispensers lock out, then pours away the first few glasses. Monogram’s manual fills the new cartridge with tap water first, then runs 3 gallons, about six minutes, through the dispenser.
What water pressure does a refrigerator dispenser need?
Sub-Zero asks for a steady 20 to 100 psi on all 500 and 600 Series models, and 20 to 100 or 35 to 120 on its others, depending on the model; it offers no way to measure it, so that is for a plumber. Monogram’s manual asks for 40 to 120 psi. GE adds that below 40 psi its ice makers may make hollow cubes or slow down.
Sources
- Sub-Zero, 600 Series water dispenser not working: priming on first use, five minutes and 60 seconds, the 685 and 695 lock, Sabbath Mode, and the restart of the water side of the dual water valve.
- Sub-Zero Classic answers: internal water dispenser not working (BI, CL) (priming after a filter change, H2 LO, Sabbath Mode, the French door light switches, the valve restart, the supply) and external ice or water dispenser does not work (the lock, Sabbath Mode, the valve restart).
- Sub-Zero Designer answers: water dispenser not working (IT, IC), internal water dispenser (the twelve models, the 60-second limit, the first glasses), water dispenser disable (serial 5959000; no separate switch on Classic (BI), 500 and 600) and the Owner’s App water dispenser.
- Sub-Zero, priming the water dispenser tank: air first, 60 seconds, 10 seconds, the first few glasses; Classic (BI) water filtration system: several glasses over two minutes after a filter change.
- Sub-Zero, water dispenser too slow: the filter icon, sediment or calcium, the toothbrush or toothpick, and what the flow depends on; frequent water filter replacement: the pressure falling through a loading filter.
- Sub-Zero lock answers: 685 and 695, Classic (BI), Classic (BI) internal, 590, 680, 690 and Classic (CL) external dispenser; Classic (BI) error code H2 LO: a gallon in 15 minutes, 150 seconds, 45 minutes, the two unlocks.
- Sub-Zero Sabbath Mode answers: 600 Series, Classic (BI) and Classic (CL): the dispenser disabled, and the return after a power failure.
- Sub-Zero water answers: tank volume, adding a dispenser, the shut-off valve, 500 and 600 Series water pressure, confirming water pressure, models with and without a filter, Classic (BI) and Classic (CL) filter bypass, reverse osmosis and dispenser turns on by itself.
- Sub-Zero Built-In (600-2) Series technical service manual (Job Aid #3758407, 2005): the 685 and 695 with ice and water dispensers (pp. 1-9, 1-10), the dual water valve (pp. 7-7, 7-53), and a constant 20 to 100 psi (pp. 8-15, 8-17).
- GE Consumer Home Services technical service guide 31-9091 (2002), Monogram ZIS360, ZIS420 and ZIS480: the water route and the chilled water tank (p. 13), the machine compartment at the top (p. 25), and the diagnostic mode (p. 52).
- GE Appliances, Monogram owner’s manual for 36", 42" and 48" built-in side-by-side refrigerators, 49-1000362 Rev. 8 (04-26): 40 to 120 psi (pp. 4, 11, 14), the filter, the free bypass plug and 3 gallons (p. 11), air, the first gallon and LOCK (p. 12), the first glass (p. 13), Sabbath Mode (p. 15), the water tank cover (p. 18), troubleshooting (p. 25).
- GE Appliances answers for its refrigerators: dispenser not getting water, no water from dispenser and dispenser water flow test: the bypass plug test, air after a filter change, a frozen tank or tubing, 24 to 48 hours, a split tank, 20 seconds and 8 ounces, and hollow cubes below 40 psi.
- Viking Preferred Service manual SMR-0022, VCRB5301 / VCRB5361 all-refrigerator, May 2012: the table of contents and the refrigerator compartment parts (pp. 20–23), with no dispenser, water valve, tank or filter.
- U.S. Consumer Product Safety Commission, recall 09-242 (June 16, 2009) and recall 13-248 (July 25, 2013): Viking built-in 48-inch side-by-sides and 36-inch bottom-freezer refrigerators whose doors can detach, when to stop using one, and the free in-home repair; recall 14-023 (November 19, 2013): 42- and 48-inch side-by-sides with in-door dispensers, made October 2012 to May 2013, whose wiring connectors can overheat.
Written from these sources and reviewed on (checked again ) by Aphelion Appliance Repair, Phoenix. Steps, lockouts and pressures belong to the series and models named beside them, and other series differ. Nothing here is a manufacturer’s instruction.
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- What hard water does to the ice makerPublished hardness for Phoenix, Scottsdale, Mesa, Chandler and Gilbert, what scale does inside a built-in ice machine, and the cleaning the makers actually specify.
- Water on the floor, under the refrigeratorShut the supply off, then measure. A pint is the threshold, and the series decides whether the drain is yours.
Still slow, or still dry?
Tell us the make, the model from the tag, and whether the ice maker still fills. We answer every day, 7am–6pm.