mypros+
Error code reference

Dacor Range Oven Cooktop Error Code F31

Discovery Range: RTD Short

Dacor codesDacor range oven cooktop codes

Discovery Range: RTD Short - shorted temperature sensor or shorted temperature sensor wiring.

First step from the service manual

Replace sensor or repair sensor wiring.

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

MyPros+ Max

Get the full diagnostic procedure for F31.

  • 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
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F31 means on a Dacor range oven cooktop

The F31 error code on a Dacor Discovery Range indicates a shorted RTD (Resistance Temperature Detector) sensor or shorted sensor wiring. An RTD sensor operates by changing its electrical resistance in response to temperature. When the sensor or its wiring develops a short circuit, the control board reads an abnormally low resistance value, which falls outside the expected operating range. This causes the board to flag the F31 fault and halt normal oven operation to prevent unsafe temperature control.

The RTD sensor itself is a probe mounted inside the oven cavity, connected to the control board via a two-wire circuit. A short can occur within the sensor element itself if the internal sensing element fails, or it can occur along the wiring harness if the insulation has worn through, been pinched, or been damaged by heat exposure. Both conditions produce the same low-resistance signal that the control board interprets as a shorted circuit.

Diagnosing F31 begins with identifying whether the fault lies in the sensor or the wiring. Disconnecting the sensor from the wiring harness and measuring resistance across the sensor terminals with a multimeter can help isolate the cause. A shorted sensor will read near zero ohms rather than the expected resistance value at room temperature. If the sensor reads correctly when disconnected, the wiring harness itself should be inspected for pinched, melted, or bare spots that could be causing the short to ground or to another conductor.

Source: manufacturer service documentation.

Common causes of F31

  1. 01

    Failed RTD Temperature Sensor

    Part replacement

    The RTD sensor probe inside the oven cavity can fail internally, causing a short circuit within the sensing element. This typically produces a near-zero ohm reading when measured with a multimeter at the sensor terminals.

  2. 02

    Damaged or Pinched Sensor Wiring

    Part replacement

    The wiring harness running from the RTD sensor to the control board can develop a short if the insulation is worn, pinched by oven components, or melted from heat exposure. Visually inspecting the wiring along its full run can reveal the damage point.

  3. 03

    Loose or Corroded Sensor Connector

    Wiring / connection

    A corroded or improperly seated connector at either the sensor end or the control board end can create a low-resistance path that mimics a short. Inspecting and reseating the connector may resolve the fault without replacing any parts.

  4. 04

    Heat-Induced Wiring Insulation Failure

    Part replacement

    Prolonged exposure to high oven temperatures can degrade the insulation on the sensor wires over time, eventually causing two conductors to contact each other and create a short. This is more common on older or heavily used units.

See the test procedure for each cause

Frequently asked questions about F31

What does F31 mean on a Dacor range, oven, cooktop?
F31 on a Dacor Discovery Range indicates a shorted RTD temperature sensor or shorted sensor wiring. The RTD sensor measures oven cavity temperature by varying its electrical resistance, and a short circuit causes the control board to read an abnormally low resistance value. The oven triggers this fault code to prevent unsafe or uncontrolled heating. Both the sensor itself and the wiring connecting it to the control board are potential sources of the short.
Can I fix the F31 error code myself?
A knowledgeable DIYer can attempt to diagnose and repair the F31 code by testing the RTD sensor resistance with a multimeter and visually inspecting the sensor wiring for damage. If the sensor tests shorted, replacing it is a straightforward repair involving disconnecting the old sensor and installing a new one. If the wiring harness is damaged, repairing or replacing the affected wiring section is also possible but requires care to ensure proper insulation in a high-heat environment.
Is it safe to use my Dacor oven when F31 is displayed?
Operating the oven while F31 is active is not recommended. A shorted temperature sensor means the control board cannot accurately monitor the oven cavity temperature, which could result in overheating or unpredictable heating behavior. It is best to discontinue use until the sensor or wiring has been repaired or replaced.
Will resetting the oven clear the F31 error code?
Resetting the oven by cycling the power may temporarily clear the F31 display, but the code will return if the underlying short in the sensor or wiring has not been corrected. A reset does not repair the sensor or wiring fault. The code will reappear as soon as the control board attempts to read temperature data and detects the short again.
How much does it cost to fix a Dacor F31 error code?
Repair costs vary depending on whether the fault is in the sensor or the wiring. An RTD temperature sensor replacement part typically costs in the range of $30 to $100 depending on the specific model, while professional labor for diagnosis and replacement can add $100 to $250 or more. If only the wiring needs repair rather than full replacement, the cost may be lower. Getting a diagnostic estimate from a qualified technician before committing to the repair is advisable.

Related Dacor range oven cooktop codes

All Dacor range oven cooktop codes
View all 115 Dacor range oven cooktop codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass