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Error code reference

Jenn-Air Dishwasher Error Code E:29

Undervoltage (170V-195V); appliance stops in current position, without function; malfunction or…

Jenn-Air codesJenn-Air dishwasher codes

Undervoltage (170V-195V); appliance stops in current position, without function; malfunction or unsatisfactory rinsing/drying result.

First step from the service manual

No appliance fault (check power supply voltage).

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

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What E:29 means on a Jenn-Air dishwasher

Error code E:29 on a Jenn-Air dishwasher indicates an undervoltage condition, meaning the appliance is detecting incoming line voltage that has dropped into the range of approximately 170V to 195V. Standard residential voltage in North America should measure between 120V (single phase) or 240V depending on the circuit, and dishwashers are designed to operate within a defined voltage tolerance. When supply voltage falls below the acceptable threshold, the control board detects the deficiency and halts the appliance in its current position, disabling all functions to prevent damage to motors, heating elements, and electronics.

Because E:29 reflects an external power supply issue rather than a failed internal component, the first diagnostic step is to check the voltage at the outlet or terminal block feeding the dishwasher. A multimeter should be used to measure line voltage during operation, not just at idle, since voltage can sag under load. Causes can include a weak utility feed, a shared circuit with heavy appliances, a deteriorating breaker, loose wiring connections at the panel or junction box, or broader utility grid fluctuations affecting the home.

If the cycle was interrupted mid-run due to this fault, the dishwasher may produce unsatisfactory rinsing or drying results because the heating element or pump motor did not complete their programmed sequences. Once proper voltage is restored and verified, the unit should resume normal operation. No internal repair to the dishwasher is typically required if the root cause is confirmed to be a supply-side voltage problem.

Source: manufacturer service documentation.

Common causes of E:29

  1. 01

    Low utility or grid voltage

    Wiring / connection

    The incoming voltage from the utility company may be sagging below acceptable levels, especially during peak demand hours. Measure voltage at the outlet during appliance operation to confirm.

  2. 02

    Overloaded or shared circuit

    Wiring / connection

    If the dishwasher shares a circuit with other high-draw appliances, simultaneous operation can cause voltage to drop below the 195V threshold. Verify the dishwasher is on a dedicated circuit as required.

  3. 03

    Loose or corroded wiring connections

    Wiring / connection

    Loose connections at the wall outlet, junction box, or breaker panel can cause resistance-induced voltage drop, especially under load. Inspect all connections for tightness and signs of corrosion or heat damage.

  4. 04

    Weak or failing circuit breaker

    Part replacement

    A breaker that is beginning to fail may not maintain consistent voltage to the circuit, particularly when current draw increases during pump or heater operation. The breaker may need replacement by a licensed electrician.

  5. 05

    Undersized or damaged supply wiring

    Part replacement

    Wiring that is too small for the circuit load or that has degraded insulation and conductors can introduce resistance and cause voltage drop. This requires inspection of the wiring run from the panel to the appliance.

See the test procedure for each cause

Frequently asked questions about E:29

What does E:29 mean on a Jenn-Air dishwasher?
E:29 is an undervoltage error, indicating the dishwasher detected incoming supply voltage in the range of 170V to 195V, which is below the level needed for proper operation. The appliance stops in its current position and disables all functions until adequate voltage is restored. This code points to an external power supply problem rather than a failed part inside the dishwasher.
Can I fix the E:29 error myself?
If the cause is a utility grid issue or an overloaded circuit, you may be able to resolve it by identifying and reducing the load on the circuit or waiting for utility voltage to stabilize. However, if the cause involves the breaker panel, wiring connections, or supply wiring, a licensed electrician should perform the inspection and repair. Always measure voltage at the outlet with a multimeter before assuming the dishwasher itself needs service.
Is it safe to use the dishwasher while E:29 is active?
No. The dishwasher has deliberately stopped operation because the voltage is insufficient for safe and reliable function. Running appliances on undervoltage can stress motors and electronics, potentially causing premature component failure. Restore proper voltage before attempting to resume a wash cycle.
Will resetting the dishwasher clear the E:29 error?
Resetting the dishwasher may clear the error code temporarily, but if the underlying voltage issue has not been corrected, the code will return as soon as the appliance attempts to draw power for heating or pumping. Address the power supply problem first, then reset the unit to confirm the fault does not reappear.
How much will it cost to fix the E:29 error on a Jenn-Air dishwasher?
If the issue is a utility voltage problem or a simple circuit overload, there may be no cost beyond an electrician's diagnostic fee, which typically ranges from $75 to $150. If a breaker replacement is needed, parts and labor generally run between $150 and $300. More extensive wiring repairs or panel work can cost significantly more depending on the scope of the problem.

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