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Error code reference

Frigidaire Cooktop Error Code E37

Heat sink temperature sensor break (3 zones induction module / left side cooking zones).

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Heat sink temperature sensor break (3 zones induction module / left side cooking zones).

First step from the service manual

Replace the generator circuit board (LF/LR) in the 3 zones induction module.

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

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What E37 means on a Frigidaire cooktop

The E37 error code on a Frigidaire induction cooktop indicates a heat sink temperature sensor break within the 3-zone induction module, specifically affecting the left-side cooking zones. The heat sink temperature sensor monitors the thermal state of the power electronics within the induction generator circuit board. When this sensor circuit is open or broken, the control system loses its ability to track heat sink temperatures, triggering E37 as a protective fault condition to prevent uncontrolled overheating of the module's internal components.

The 3-zone induction module contains a generator circuit board for the left front and left rear cooking zones (designated LF/LR). This board houses the inverter electronics, IGBT transistors, and the associated heat sink assembly with its embedded or attached temperature sensor. A sensor "break" refers to an open circuit condition in the sensor or its wiring, meaning the control board receives no valid signal. This can result from a physically cracked or disconnected sensor, a failed sensor element, or damaged wiring between the sensor and the generator board.

Because the sensor is integrated with or closely coupled to the generator circuit board assembly, the primary diagnostic action is replacement of the LF/LR generator circuit board itself. Attempting to isolate a standalone sensor fault may not be practical if the sensor is not a separately serviceable component. Inspecting wiring harness connectors between the generator board and the main control board for corrosion, looseness, or heat damage is also a reasonable preliminary check before committing to a full board replacement.

Source: manufacturer service documentation.

Common causes of E37

  1. 01

    Failed generator circuit board (LF/LR)

    Part replacement

    The temperature sensor is integrated with or directly connected to the left-side generator circuit board. An internal failure of the sensor element or its connection on the board is the most common source of this fault and typically requires full board replacement.

  2. 02

    Broken or open-circuit temperature sensor

    Part replacement

    The heat sink temperature sensor itself may have developed an open circuit due to physical cracking, heat stress, or component fatigue. This breaks the signal path and triggers the E37 fault.

  3. 03

    Loose or damaged wiring harness connector

    Wiring / connection

    The connector between the heat sink temperature sensor and the generator board may be loose, corroded, or damaged. Inspecting and reseating these connectors is a useful preliminary step before replacing the board.

  4. 04

    Heat damage to sensor wiring

    Part replacement

    Prolonged high-temperature operation can degrade the insulation and conductors in the sensor wiring, causing an intermittent or permanent open circuit. Look for discoloration or brittleness in the wiring near the heat sink area.

See the test procedure for each cause

Frequently asked questions about E37

What does E37 mean on a Frigidaire cooktop?
E37 indicates a heat sink temperature sensor break in the 3-zone induction module that controls the left-side cooking zones. The cooktop has detected an open circuit in the sensor that monitors temperatures inside the left front and left rear induction generator board. This is a protective fault that disables operation to prevent potential overheating of the module's electronics.
Can I fix the E37 error myself on a Frigidaire induction cooktop?
The primary repair is replacement of the LF/LR generator circuit board in the 3-zone induction module, which requires disassembling the cooktop and working with high-voltage power electronics. A preliminary check of wiring harness connectors is something a knowledgeable DIYer can attempt, but the board replacement itself is best handled by a qualified appliance technician due to the voltages involved in induction cooking systems.
Is it safe to use my Frigidaire cooktop when E37 is displayed?
No, you should not continue using the cooktop while E37 is active. The error means the system can no longer monitor heat sink temperatures in the left-side induction module, removing a key safety protection against overheating. Operating the unit without functional thermal monitoring could allow the electronics to overheat, potentially causing further component damage or creating a fire risk.
Will resetting the cooktop clear the E37 error code?
A power reset by disconnecting the cooktop from its power source for several minutes may temporarily clear the error display, but the code will return if the underlying sensor circuit fault is still present. E37 reflects a hardware fault, specifically an open sensor circuit, so it requires a physical repair rather than just a reset to permanently resolve.
How much does it cost to repair an E37 error on a Frigidaire cooktop?
Repair costs will vary depending on parts availability and local labor rates, but you can generally expect to pay somewhere in the range of $150 to $400 or more for a generator circuit board replacement when including both parts and professional labor. Getting a service estimate before committing to the repair is advisable, especially on older units where repair cost versus replacement cost should be weighed.

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