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Error code reference

Thor Kitchen Refrigerator Error Code E1

R-compartment (refrigerator) sensor error

Thor Kitchen codesThor Kitchen refrigerator codes

R-compartment (refrigerator) sensor error: sensor reading below -50°C (-58°F) indicating open circuit, or above 50°C (122°F) indicating short circuit.

First step from the service manual

Check R-compartment sensor resistance and wiring connections.

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

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What E1 means on a Thor Kitchen refrigerator

The E1 error code on a Thor Kitchen refrigerator indicates a fault with the R-compartment temperature sensor, which monitors conditions inside the fresh food (refrigerator) section. The control board determines sensor status by reading the resistance value returned by the NTC thermistor. When the sensor reading falls below -50°C (-58°F), the board interprets this as an open circuit condition, meaning the electrical path through the sensor has been broken. When the reading exceeds 50°C (122°F), the board interprets this as a short circuit, where resistance has collapsed abnormally low. Either condition prevents the board from receiving valid temperature data for the R-compartment.

The NTC thermistor used for the R-compartment is a passive resistive component whose resistance decreases predictably as temperature rises. A break in the sensor body, a corroded connector pin, or a severed wire will cause the circuit to read as open, pushing the apparent temperature below the lower threshold. Conversely, moisture intrusion into the connector or internal sensor failure can cause the two conductors to short together, driving the reading above the upper threshold. Both failure modes produce E1 and halt normal temperature regulation for the fresh food section.

Diagnosis begins with a physical inspection of the sensor wiring harness and connector for damage, corrosion, or loose seating. Following that, resistance should be measured across the sensor terminals and compared against the expected value at the current ambient temperature. If wiring and connectors test sound but resistance is out of range, the sensor itself requires replacement.

Source: manufacturer service documentation.

Common causes of E1

  1. 01

    Disconnected or loose sensor connector

    Wiring / connection

    The wiring harness connector linking the R-compartment sensor to the control board can work loose over time, especially after moving the appliance or performing interior cleaning. Inspect the connector at both the sensor end and the board end for proper seating.

  2. 02

    Failed R-compartment NTC thermistor

    Part replacement

    The sensor itself can fail internally due to age, moisture exposure, or physical damage, causing it to read outside the valid range. Measure resistance across the sensor terminals; a reading that does not correspond to the ambient temperature indicates a faulty sensor that must be replaced.

  3. 03

    Damaged or broken sensor wire

    Part replacement

    The wire running from the sensor to the control board can be pinched, cut, or develop an open due to fatigue from repeated door cycling. Visually trace the full length of the wire and perform a continuity check to locate any breaks.

  4. 04

    Corroded or moisture-damaged connector pins

    Wiring / connection

    Condensation inside the refrigerator compartment can migrate into the sensor connector over time, causing corrosion that increases resistance or causes intermittent shorts. Clean the connector pins carefully and check for discoloration or oxidation.

  5. 05

    Control board fault misreading sensor input

    Part replacement

    In less common cases, the control board input circuit responsible for processing the sensor signal can fail, causing it to report an out-of-range value even when the sensor and wiring are intact. This should only be considered after the sensor and wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about E1

What does E1 mean on a Thor Kitchen refrigerator?
E1 indicates a fault with the temperature sensor located in the R-compartment, which is the main fresh food section. The control board has detected a sensor reading either below -50°C (-58°F), signaling an open circuit, or above 50°C (122°F), signaling a short circuit. Both conditions mean the board cannot receive valid temperature data. The sensor, its wiring, or the connector between them is the most likely source of the problem.
Can I fix the E1 error code myself?
Some causes of E1 are DIY-friendly, particularly reseating a loose connector or cleaning corroded terminals. If the sensor wiring and connectors check out, replacing the R-compartment thermistor is a moderate repair that involves accessing the sensor inside the fridge compartment, disconnecting the harness, and installing a new sensor. If the control board is implicated, board replacement is more complex and may warrant professional service.
Will resetting the refrigerator clear the E1 code?
A power reset by unplugging the unit for a few minutes may temporarily clear the code if the fault was caused by a momentary glitch or a connector that reseats itself. However, if the underlying cause is a failed sensor, damaged wire, or corroded connector, the E1 code will return as soon as the board attempts to read the sensor again. A reset alone is not a fix for a hardware fault.
Is it safe to use my refrigerator while the E1 code is active?
When E1 is active, the refrigerator cannot accurately monitor the temperature in the fresh food section, which means cooling may be unreliable or absent. Food safety could be compromised if temperatures rise into the danger zone above 40°F (4°C). It is advisable to check the actual compartment temperature with a separate thermometer and limit the time food remains in the unit until the error is resolved.
How much does it cost to repair an E1 error on a Thor Kitchen refrigerator?
If only the R-compartment sensor needs replacement, parts typically fall in the range of $15 to $60 depending on the specific model, making it one of the lower-cost refrigerator repairs when done as a DIY project. If professional labor is required, total costs including parts and service time generally range from $100 to $250. A control board replacement, if needed, would increase costs significantly, typically ranging from $200 to $400 or more for parts and labor combined.

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