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Error code reference

Cove Dishwasher Error Code 700166

PE1

Cove codesCove dishwasher codes

PE1: Pressure sensor detected an overfill fault during an inactive wash cycle.

First step from the service manual

If there are any dishes in the unit, empty the unit and test with a Rinse/Hold cycle.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 700166 means on a Cove dishwasher

Error code 700166 on a Cove dishwasher corresponds to fault designation PE1, which indicates the pressure sensor has detected an overfill condition during a period when the wash cycle is inactive. The pressure sensor continuously monitors the water level inside the tub. When it registers a water level that exceeds the normal operating threshold at a point in the cycle when no active wash program should be adding water, the control board interprets this as an overfill fault and halts operation to prevent potential water damage.

The most common source of this fault is residual water that did not drain completely at the end of a previous cycle, leaving standing water in the tub. Dishes or cookware loaded at improper angles can trap water and cause pooling, which the sensor may read as an overfill condition. A partially obstructed drain path, a faulty inlet valve that allows water to seep in when the machine is idle, or a pressure sensor that has drifted out of calibration can all produce the same PE1 fault.

Because the fault is tied to the inactive state of the wash cycle, the diagnostic process begins by ruling out physical load issues. Emptying the unit and running a Rinse/Hold cycle lets the machine attempt a controlled drain and recalibrate water level readings under a live program, which helps isolate whether the fault is caused by a loading problem, a drain restriction, a leaking inlet valve, or a sensor failure.

Source: manufacturer service documentation.

Common causes of 700166

  1. 01

    Improper dish loading trapping water

    Wiring / connection

    Bowls, pots, or containers placed face-up or at flat angles can collect and hold water, causing the pressure sensor to read a falsely elevated water level. Emptying and reloading dishes at proper angles often resolves this immediately.

  2. 02

    Incomplete drain from previous cycle

    Wiring / connection

    If the unit did not fully drain at the end of its last cycle, residual standing water can trigger the PE1 fault when the machine sits idle. Inspect the bottom of the tub for pooled water and check the drain filter and sump area for debris obstructions.

  3. 03

    Clogged or restricted drain path

    Wiring / connection

    A blocked drain filter, kinked drain hose, or obstructed drain pump can prevent water from evacuating the tub completely. Cleaning the filter assembly and verifying the drain hose has no kinks or clogs is a necessary diagnostic step.

  4. 04

    Leaking or faulty water inlet valve

    Part replacement

    An inlet valve that does not fully close when de-energized can allow water to slowly seep into the tub while the machine is idle, eventually triggering the overfill sensor. This condition is more likely if the fault appears consistently after the machine has been sitting unused for a period of time.

  5. 05

    Pressure sensor failure or drift

    Part replacement

    The pressure sensor itself may be out of calibration or have failed in a way that causes it to report an overfill condition inaccurately. If all other causes have been ruled out and the Rinse/Hold test does not clear the fault, sensor replacement should be considered.

See the test procedure for each cause

Frequently asked questions about 700166

What does 700166 mean on a Cove dishwasher?
Error code 700166 is a PE1 pressure sensor fault indicating the dishwasher detected an overfill condition while the wash cycle was inactive. The pressure sensor measured a water level above the acceptable threshold at a time when no active program should have been adding water. The machine stops operation automatically to prevent overflow. Common triggers include trapped water from improperly loaded dishes, incomplete draining, or a failing inlet valve.
How do I fix error code 700166 on my Cove dishwasher?
Start by removing all dishes from the unit, then run a Rinse/Hold cycle to allow the machine to drain and reset its water level readings. If the error clears, reload dishes carefully so no items are positioned to collect water. If the error persists after the Rinse/Hold test, inspect the drain filter, sump, and drain hose for obstructions, and consider having the inlet valve and pressure sensor evaluated by a qualified technician.
Will resetting my Cove dishwasher clear error code 700166?
A simple power reset alone is unlikely to permanently resolve this fault if there is an underlying cause such as standing water, a drain restriction, or a leaking inlet valve. The recommended approach is to empty the unit and run a Rinse/Hold cycle rather than just cycling power. If the root cause is not addressed, the PE1 fault will likely return during or after the next wash cycle.
Is it safe to use my Cove dishwasher when error 700166 is showing?
You should not attempt to run a full wash cycle while this fault is active. The PE1 code means the machine has detected a water level condition that could lead to overflow, and the unit has halted operation as a safety measure. Operating the dishwasher before diagnosing and clearing the root cause risks water damage to your kitchen. Complete the recommended diagnostic steps first, and only resume normal use once the fault has cleared.
How much does it cost to repair a Cove dishwasher showing error 700166?
Repair costs vary significantly depending on the root cause. If the issue is resolved by clearing a clogged drain filter or correcting dish placement, there is no parts cost involved. If a component such as the water inlet valve or pressure sensor requires replacement, parts and labor costs typically range from a modest service call fee up to several hundred dollars depending on your location and the specific parts needed. A professional diagnosis is the best way to get an accurate estimate for your situation.

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