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Error code reference

GE Range Error Code F33

Warming drawer sensor failure when warming drawer is active (fault limit 20 sec).

GE codesGE range codes

Warming drawer sensor failure when warming drawer is active (fault limit 20 sec).

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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
  • Verified part numbers when replacement is required
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What F33 means on a GE range

The F33 error code on a GE range indicates a warming drawer sensor failure detected while the warming drawer is actively operating. Specifically, the control board monitors the warming drawer temperature sensor (a thermistor or RTD-type sensor) and expects valid resistance or voltage readings within a defined window. If the sensor signal falls outside acceptable parameters for 20 continuous seconds while the warming drawer is energized, the control board logs F33 and typically shuts down the warming drawer circuit as a safety measure.

The warming drawer sensor is responsible for providing real-time temperature feedback to the control board, allowing the system to regulate the heating element and maintain the set temperature. When this sensor fails, opens, or shorts, the board loses the ability to safely control drawer temperature. Common failure points include a broken sensor element, degraded wiring connections at the sensor harness, or corrosion at the connector pins that introduces resistance into the signal circuit.

Because the fault threshold is tied to active drawer operation (not standby), the error will only trigger when the warming drawer is turned on. This means intermittent faults may be difficult to reproduce during initial inspection. Technicians should inspect the sensor wiring harness for heat damage, chafing, or loose connectors before condemning the sensor itself. The control board is a less common but possible cause if sensor and wiring check out within specification.

Source: manufacturer service documentation.

Common causes of F33

  1. 01

    Faulty warming drawer temperature sensor

    Part replacement

    The sensor itself may have developed an open circuit or short, causing it to send an invalid signal to the control board. Testing the sensor's resistance with a multimeter and comparing to the specified range will confirm this failure.

  2. 02

    Loose or disconnected sensor wiring harness

    Wiring / connection

    The connector between the warming drawer sensor and the main wiring harness can loosen over time due to vibration or heat cycling. Inspect the connector for corrosion, bent pins, or a loose fit at both the sensor and control board ends.

  3. 03

    Damaged sensor wiring

    Part replacement

    Wires routed near the warming drawer heating element can experience heat damage, insulation breakdown, or chafing against metal edges, causing intermittent or complete signal loss. Visually trace the full wire path for burns, nicks, or bare conductors.

  4. 04

    Corroded connector pins

    Wiring / connection

    Moisture or grease contamination at the sensor connector can cause corrosion that increases resistance in the signal circuit enough to push readings outside the acceptable range. Cleaning or replacing the connector may resolve the fault.

  5. 05

    Defective control board

    Part replacement

    If the sensor and all wiring test within specification, the control board's input circuit for the warming drawer sensor may have failed. This is the least common cause and should only be considered after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about F33

What does F33 mean on a GE range?
F33 on a GE range signals a warming drawer sensor failure that occurred while the warming drawer was actively in use. The control board monitors the drawer's temperature sensor continuously, and if it receives an invalid or absent signal for 20 seconds, it triggers F33. The warming drawer circuit is typically disabled until the issue is resolved. The fault points to the sensor, its wiring, or in rare cases the control board.
Can I fix the F33 error myself?
Some causes of F33 are DIY-friendly, such as reseating a loose wiring connector or cleaning corroded pins at the sensor harness. However, replacing the warming drawer sensor or control board requires comfort working around electrical components and disassembling part of the range. If you are not experienced with appliance repair, a qualified technician is the safer choice.
Is it safe to use my GE range while the F33 code is active?
The main oven and cooktop burners are separate from the warming drawer circuit, so they may continue to function normally while F33 is present. However, the warming drawer should not be used until the sensor fault is diagnosed and repaired, since the control board cannot regulate drawer temperature without a functioning sensor. Continuing to use a heating element without temperature feedback creates a potential overheating risk.
Will resetting the range clear the F33 error code?
Resetting the range by cutting power at the breaker for a few minutes may temporarily clear the F33 code, but if the underlying sensor or wiring problem still exists, the fault will return once the warming drawer is turned on again and the 20-second threshold is reached. A reset alone is not a repair. The root cause must be identified and corrected for the error to stay cleared.
How much does it cost to repair a GE range F33 error?
Repair costs depend on which component has failed. A warming drawer temperature sensor typically costs somewhere in the range of $20 to $60 for the part, while professional labor to diagnose and replace it can add $75 to $150 or more depending on your area. If the control board is at fault, board replacement costs generally range from $150 to $350 or higher for parts alone. Getting a diagnostic visit from a technician before purchasing parts is usually advisable.

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