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The open lower cabinet beside a new dishwasher in a home kitchen, the dishwasher's drain hose rising in a high loop and clipped to the underside of the counter, a braided supply line running to a quarter-turn valve, a folded towel on the cabinet floor, nobody in the frame.

Thermador E18: fill level in a dish care machine

Thermador documents this as a separate condition from a total no-fill: water is arriving, but the level is too low, or is not being pumped correctly.

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  • Water supply and drain
  • Water supply and shutoff connection
  • Source: Thermador

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What E18
actually means.

Thermador documents this as a separate condition from a total no-fill: water is arriving, but the level is too low, or is not being pumped correctly. Thermador's own fix again begins with the inlet hose and the water supply being fully on, which places this squarely with the hookup rather than a failed sensor.

Thermador appliance display

What to do when E18 shows on the appliance

Kind of codeWater supply and drain

The new appliance is reporting what it gets from the water connections behind it. A no-water or slow-fill message on the first fill usually means the supply valve is still closed or only half open, or the new line kinked when the unit slid back; a drain message means the drain hose is pinched, pushed too deep into the standpipe, or looped higher or lower than the installation instructions allow. Open the valve fully, straighten the hose, set it to the height the manual gives, and run the cycle again.

Usually leads toWater supply and shutoff connection

New supply lines from a working quarter-turn stop to each water appliance, tested under pressure.

Shows up asWater Hammer After a Hookup: Banging Pipes When a Valve Shuts

Water hammer after a hookup is a bang, knock or shudder in the pipes each time a newly connected appliance closes its water valve.

MakeThermador

Thermador installs include pro ranges and rangetops with their hoods, wall ovens and steam ovens, integrated column refrigeration and dishwashers.

SourceThermador US error codes — dishwashers

Confirmed on Thermador's current US error-code page for dish care machines.

Before you book,
in this order.

Each step comes from Thermador's own guidance for E18 on its appliances. Follow it to the end: the last card says whether this is a visit.

01

Check the inlet hose for a kink or visible damage along its full length.

02

Confirm the water supply is turned fully on, not just cracked open.

03

Run a short cycle and listen for water entering steadily rather than in short bursts.

04

If the fill still falls short with a clear hose and open supply, book a visit.

Still there?

It usually turns into water supply and shutoff connection. Book with the code and the model number.

What not to do

This alert is not automatically the same problem as a total loss of water flow, and Thermador's own guidance treats it as a related but distinct condition with the same hookup-first fix.

What you may
notice with it.

The appliance problems E18 tends to arrive with. Answer these at the appliance before anyone is booked.

All problems

Before you call

Water Hammer After a Hookup: Banging Pipes When a Valve Shuts

All 6 causes, cheapest first

It also comes with

Close view behind a new white front-loading laundry machine, two chrome water hammer arrestors fitted on the hot and cold wall valves above braided stainless fill hoses that hang in a gentle loop, a painted wall and the top edge of the machine in soft focus, soft daylight. Problem

Water Hammer After a Hookup: Banging Pipes When a Valve Shuts

6 causes, cheapest first

Where E18 usually leads

Water supply and shutoff connection.

New supply line and quarter-turn stop for a refrigerator, ice maker, dish care machine or laundry pair, flushed and tested under pressure · low.
Book a visit What the job involves

Thermador
appliances.

Thermador installs include pro ranges and rangetops with their hoods, wall ovens and steam ovens, integrated column refrigeration and dishwashers.

Thermador appliance installation

More Thermador codes

dEE16

Water supply and drain on other makes

ASKO F12Bosch E17Cove Error 800115Dacor 4CDCS Blank display / OFF after power interruptionElectrolux HO SEFisher & Paykel Water is not getting to the machineFrigidaire E1
All 38 codes of this kind
A bright kitchen during an installation, a new stainless French door refrigerator on a low four-wheel appliance dolly being eased toward an empty cabinet opening, a technician seen from behind and shoulders down guiding it with one hand on the side of the cabinet, a folded moving blanket and a coil of new braided water line on a protective floor runner, cardboard corner guards at the edge of the frame, even daylight. Thermador builds this

Cold storage

Setting a new refrigerator, freezer, wine or beverage unit or ice maker into its opening: measured, connected to water, leveled and started.

 A home kitchen mid-installation, a new stainless freestanding gas range pulled a foot out from its opening, a technician seen from the shoulders down kneeling beside it and tightening a new yellow-coated flexible gas connector to a wall shutoff valve with a wrench, a small spray bottle of leak solution on the floor, the anti-tip bracket screwed to the floor at the back, every burner off, even daylight. Thermador builds this

Cooking appliances

Hooking up ranges, cooktops, wall ovens, microwaves and hoods: gas connectors leak-tested, anti-tip brackets fastened, ducts sized and the first light checked.

 A kitchen during an installation, a new stainless built-in dishwasher halfway slid into its opening under a stone counter, its kick plate removed, a technician seen from behind and shoulders down on one knee guiding a gray drain hose and a braided supply line through the hole in the side cabinet, the sink cabinet doors open beside him, a flashlight on the floor, even daylight. Thermador builds this

Dish care

Fitting a new dishwasher or dish drawer under the counter: supply line, drain loop or air gap, power, mounting brackets and a first test cycle.

In Thermador's own words

E18 - The water level is too low, or water is not being pumped correctly.
Thermador US error codes — dishwashers

Every code on this site is taken from the manufacturer's documentation, never from a forum or a parts listing. Confirmed on Thermador's current US error-code page for dish care machines.

Thermador E18 appliance installation,
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 areas

Tampa BayFL · 31 areas

OrlandoFL · 30 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

San Francisco Bay AreaCA · 74 areas

A family unpacking groceries into a newly fitted kitchen, the fresh appliances set flush in their openings.
For the heart of your home.

Questions
about E18.

Can I clear E18 myself?
Check the inlet hose for a kink or visible damage along its full length. If it comes back, it needs a visit.
The dish care machine takes in some water but E18 still appears. What's different about this alert?
Thermador documents E18 as the fill level staying too low even though water is arriving, which points at a restriction or a low-pressure supply rather than a completely blocked line.
Could low household water pressure really be the cause here?
Yes — Thermador's own fix for this alert starts with confirming the supply is fully open, which is the practical way of ruling pressure in or out before assuming a part has failed.
If the hose and supply both check out, what happens next?
At that point Thermador's own guidance moves past the hookup and into a visit, since the documented installation causes have been ruled out.

Back to your everyday

Still showing E18?

A booking moves faster with three things: the message exactly as the display shows it, the model number from the carton or the rating plate, and the moment it first appeared. With those, the office can tell whether it is a setup step or a connection to put right, and send the part that fixes it.

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