Manitowoc E20: water level probes gave an impossible reading
An Indigo head fills its water trough to a high and low probe and watches them through the cycle.
Mon–Sat, 8am–8pm
- Water supply
- Ice machine water valve and filter repair
- Source: Manitowoc
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What E20
actually means.
An Indigo head fills its water trough to a high and low probe and watches them through the cycle. If the high probe senses water while the low one does not, if water is still at the low probe after harvest, or if the evaporator gets far too cold early in the freeze, the board logs E20. Scale bridging the probes, a stuck dump valve, low water pressure or a leaking inlet valve are typical reasons.
Manitowoc ice machine display
What to do when E20 shows on the ice machineKind of codeWater supply
The water side came up short: the trough did not fill in the time allowed, the float or level probe never saw water, or water kept flowing when the inlet valve should have closed. A supply valve left partly shut, a clogged filter cartridge, low building pressure or a sticking inlet valve are the usual causes. Opening the valve fully and fitting a fresh filter clears the simple cases; a valve that hums without passing water is a visit.
Usually leads toIce machine water valve and filter repair
The inlet valve, filter, sump float or level probe and supply line, tested and replaced when water arrives short, dirty or nonstop.
Shows up asIce Machine Error Code or Flashing Light: What It Is Telling You
An ice machine error code may show as a number on a small display, a pattern of blinking lights on the control board, a colored light on the front, or a machine that stops with one indicator flashing.
MakeManitowoc
With a Manitowoc ice machine, the technician notes what the controls report and checks the bin control before opening the cycle for testing.
SourceManitowoc Indigo Series air, water and remote condenser ice machines technician's handbook (Part Number 000014794)
Indigo heads; G-board firmware 4.017 records it in the Event Log only and can fall back to safe mode (E31). Manitowoc asks for 20 to 80 psi at the water inlet.
Before you book,
in this order.
Each step comes from Manitowoc's own guidance for E20 on its ice machines. Follow it to the end: the last card says whether this is a visit.
Check that the water supply valve is fully open and that any filter cartridge ahead of the head is not overdue.
Watch the trough during a fill: water should rise and stop, not keep running.
If water keeps running into the trough with the head off, close the supply valve and book a visit.
Still there?
It usually turns into ice machine water valve and filter repair. Book with the code and the model number.
What not to do
E20 is not the ice thickness probe; that is E19. It does not by itself mean the drain is blocked, although a dump valve that will not open can trigger it.
What you may
notice with it.
The ice machine problems E20 tends to arrive with. Answer these at the ice machine before anyone is booked.
All problems
Where E20 usually leads
Ice machine water valve and filter repair.
Manitowoc
ice machines.
With a Manitowoc ice machine, the technician notes what the controls report and checks the bin control before opening the cycle for testing.
Manitowoc ice machine repairMore Manitowoc codes
All 15 Manitowoc codesWater supply on other makes
Modular ice machine
An ice-making head set on top of a separate storage bin or drink dispenser, cooled by air, water or a condenser on the roof, turning out hundreds of pounds of cubes a day.
Undercounter ice machine
A self-contained ice machine that makes and stores its own ice under a bar, a service counter or a kitchen island, from commercial units to clear-ice models in large homes.
Nugget ice machine
An ice machine that freezes a thin layer inside a chilled cylinder and pushes it out with an auger as soft, chewable nuggets, for clinics, offices, hotels and large homes.
In Manitowoc's own words
E20 Water System Fault
Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Indigo heads; G-board firmware 4.017 records it in the Event Log only and can fall back to safe mode (E31). Manitowoc asks for 20 to 80 psi at the water inlet.
Manitowoc E20 ice machine 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 E20.
Can I clear E20 myself?
Can low water pressure cause E20 on a Manitowoc?
My Manitowoc trough overflows after E20. What should I do?
Will descaling stop E20 on a Manitowoc?
Back to your everyday
Still showing E20?
A booking with a code goes further when it carries the light or code copied as it appeared, the model and serial off the data plate, and a word on whether cubes still fall into the bin. With those three in hand, our office can match the probable part to your machine the same afternoon.