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Error code reference

Zenith Dishwasher Error Code F19

Absent heat source

Zenith codesZenith dishwasher codes

Absent heat source - Calrod (heater) not detected by machine control.

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What F19 means on a Zenith dishwasher

The F19 error code on a Zenith dishwasher indicates that the machine control board has failed to detect a functioning Calrod heating element. The Calrod heater is a resistive heating element submerged at the bottom of the wash tub, responsible for heating water during wash cycles and raising air temperature during drying. The control board monitors the heater's electrical circuit to confirm it is drawing current as expected. When the board receives no signal or detects an open circuit where the heater should be active, it throws F19 and typically halts the affected cycle.

The most common root causes involve either a failed Calrod element itself or a break in the wiring and connections between the heater and the control board. A Calrod element that has burned out will present as an open circuit, meaning continuity testing with a multimeter across its terminals will show no reading. Loose or corroded terminal connections at the heater or at the control board harness can produce the same open-circuit condition without the element itself being failed. In some cases, a faulty relay on the control board that is supposed to energize the heater may be the source of the fault.

Diagnosing F19 typically begins with a visual inspection of the heater element for visible damage such as cracking or burn marks, followed by a continuity test across the heater terminals after disconnecting power. If the element tests open, replacement is required. If the element shows continuity, the wiring harness, terminal connections, and the control board's heater relay circuit should be inspected before condemning the board.

Source: manufacturer service documentation.

Common causes of F19

  1. 01

    Failed Calrod heating element

    Part replacement

    The Calrod element itself has burned out and presents as an open circuit. Disconnect power and use a multimeter to test continuity across the heater terminals. No continuity confirms a failed element requiring replacement.

  2. 02

    Loose or corroded wiring connections

    Wiring / connection

    The terminal connections at the heater or at the control board harness may be loose, corroded, or damaged, breaking the circuit without the element itself being faulty. Inspect all connectors in the heater circuit for corrosion, heat damage, or poor seating.

  3. 03

    Damaged wiring harness

    Part replacement

    The wiring between the heater and the control board may have chafed, melted, or broken conductors. Visually trace the harness for signs of damage and test wire continuity point to point.

  4. 04

    Faulty control board heater relay

    Part replacement

    The relay on the machine control board responsible for energizing the heater circuit may have failed in the open position. If the element and wiring both test good, the control board becomes the likely cause.

See the test procedure for each cause

Frequently asked questions about F19

What does F19 mean on a Zenith dishwasher?
F19 on a Zenith dishwasher means the machine control board cannot detect the Calrod heating element. The board monitors the heater circuit during operation and triggers this code when it sees an open or absent circuit where the heater should be active. The result is that the dishwasher may stop heating water or fail to complete its drying cycle. The fault points to the heating element, its wiring, or the control board itself.
Can I fix the F19 error myself?
A knowledgeable DIYer can perform the initial diagnostics, including a continuity test on the Calrod element and a visual inspection of the wiring harness and connections. If the element tests open, replacing it is a straightforward repair that requires disconnecting the unit from power and accessing the bottom of the tub. Control board replacement is more involved but still within reach for experienced DIYers comfortable working with appliance electronics.
Is it safe to keep using my dishwasher with the F19 error?
Running the dishwasher with an F19 error means the heater is not functioning, so your dishes will not be properly sanitized by hot water and drying performance will be poor. There is no immediate safety hazard from a failed open-circuit heater, but continuing to run the machine without resolving the fault is not recommended. It is best to diagnose and correct the issue before returning the unit to regular use.
How much does it cost to repair an F19 error on a Zenith dishwasher?
If only the Calrod heating element needs replacement, parts and labor typically fall in the range of $80 to $200 depending on the part cost and local labor rates. A wiring repair is usually on the lower end of that range. If the machine control board is the cause, costs can rise to the $150 to $350 range due to the higher price of the board itself.
Will resetting the dishwasher clear the F19 error code?
A power reset by disconnecting the dishwasher from its power source for several minutes may temporarily clear the F19 code, but the error will return as soon as the control board attempts to run the heater and still finds no circuit. The underlying fault in the heating element, wiring, or control board must be identified and corrected to permanently resolve the code.

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