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Error code reference

Dacor Range Oven Cooktop Error Code E1

DTF364SIWS Refrigerator

Dacor codesDacor range oven cooktop codes

DTF364SIWS Refrigerator: Freezer evaporator sensor error.

First step from the service manual

Open, shorted or disconnected.

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

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  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
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What E1 means on a Dacor range oven cooktop

The E1 error code on the Dacor DTF364SIWS indicates a freezer evaporator sensor fault. The evaporator sensor, also called the evaporator thermistor, is a temperature-sensing component mounted near the evaporator coil in the freezer section. Its job is to relay precise temperature data to the control board so the refrigeration system can regulate defrost cycles and compressor operation accurately. When the control board detects a reading that falls outside the expected resistance range for that sensor, it triggers the E1 code to alert the user and technician that the temperature data cannot be trusted.

The first diagnostic step is to determine whether the sensor circuit is open, shorted, or physically disconnected. An open circuit means the sensor or its wiring has a break that prevents current flow, which will typically cause the control board to read an abnormally high resistance or no resistance at all. A short circuit occurs when the wiring contacts an unintended ground or the sensor itself internally fails, driving resistance readings abnormally low. A disconnected connector is the simplest condition and should be checked first at the sensor harness plug before condemning any components.

Troubleshooting requires a multimeter to measure the resistance of the evaporator thermistor across its terminals and compare the reading to the expected value at a known ambient temperature. Wiring between the sensor and the control board should also be inspected for pinching, corrosion, or rodent damage. If the sensor resistance is out of spec or the circuit shows infinite or zero resistance, sensor replacement is necessary. If the wiring and connector are intact and the sensor measures correctly, the control board itself may be misreading the signal and could require further evaluation.

Source: manufacturer service documentation.

Common causes of E1

  1. 01

    Disconnected sensor connector

    Wiring / connection

    The wiring harness plug at the evaporator sensor can vibrate loose or become unseated during servicing. This is the first thing to inspect because it requires no parts to resolve.

  2. 02

    Failed evaporator thermistor

    Part replacement

    The thermistor itself can fail internally due to age, moisture exposure, or thermal stress, causing its resistance to read open or shorted. A multimeter check across the sensor terminals will confirm whether it is out of specification.

  3. 03

    Damaged or broken sensor wiring

    Part replacement

    The wiring between the evaporator sensor and the control board can develop breaks, shorts, or corrosion, particularly where it passes through cabinet openings or near moisture-prone areas. Visual inspection and continuity testing will identify the fault location.

  4. 04

    Corroded or damaged connector terminals

    Wiring / connection

    Even when the connector is seated, moisture or corrosion on the terminal pins can create high resistance in the circuit that mimics a sensor fault. Inspect the connector pins closely for oxidation or physical damage.

  5. 05

    Faulty control board

    Part replacement

    If the sensor and all wiring test correctly, the control board may be misinterpreting the sensor signal due to an internal board fault. This is the least likely cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about E1

What does E1 mean on a Dacor range, oven, cooktop?
On the Dacor DTF364SIWS, the E1 code specifically indicates a freezer evaporator sensor error, meaning the control board has detected an open, shorted, or disconnected condition in the freezer temperature sensor circuit. Despite being listed under range, oven, and cooktop categories, this code applies to the refrigerator model. The appliance cannot reliably read freezer temperatures until the sensor circuit is repaired.
Can I fix the E1 error on my Dacor refrigerator myself?
A knowledgeable DIYer can check for a disconnected sensor connector and inspect visible wiring for obvious damage without specialized tools. Testing the thermistor resistance with a multimeter is also within reach for someone comfortable with basic electrical diagnostics. However, if the sensor or control board needs replacement, comfort with disassembling refrigerator panels and working around refrigerant lines is helpful, and some may prefer a qualified technician.
Is it safe to keep using my Dacor refrigerator while the E1 code is active?
With the E1 code active, the refrigerator cannot accurately monitor freezer temperatures, which means defrost cycles and compressor control may not function correctly. Food safety could be at risk if freezer temperatures drift outside safe ranges without triggering proper responses. It is advisable to verify that the freezer is maintaining adequate temperatures with a separate thermometer and to address the fault as soon as possible.
How much does it cost to repair the E1 error on a Dacor refrigerator?
If the issue is simply a loose connector, there may be no parts cost at all, with only a service call fee to pay, typically in the range of $75 to $150. Replacing the evaporator thermistor is a relatively inexpensive repair, with parts generally ranging from $20 to $60 and labor adding $100 to $200 depending on your location. A control board replacement, if needed, is significantly more costly, with parts ranging from $150 to $400 or more.
Will resetting my Dacor refrigerator clear the E1 error code?
Resetting the appliance by disconnecting power for a few minutes may temporarily clear the E1 code, but the fault will return if the underlying sensor circuit problem has not been corrected. A reset is useful for confirming whether the code is persistent or intermittent, but it does not repair an open circuit, shorted sensor, or broken wire. Proper diagnosis and repair of the sensor circuit are required for a lasting resolution.

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