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Error code reference

Moffat Oven Error Code Err 001

Oven temperature probe fault.

Moffat codesMoffat oven codes

Oven temperature probe fault.

First step from the service manual

Check temperature probe resistance values and connection to controller.

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
  • Verified part numbers when replacement is required
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What Err 001 means on a Moffat oven

Err 001 on a Moffat oven indicates a fault with the oven temperature probe, also known as the oven temperature sensor or RTD (resistance temperature detector). This probe is responsible for continuously monitoring the internal cavity temperature and sending resistance-based readings to the oven controller. The controller uses these readings to regulate the heating elements and maintain accurate cooking temperatures. When the controller detects a resistance value outside the expected range, either too high, too low, or an open/short circuit condition, it triggers Err 001 and typically halts normal oven operation.

The temperature probe is a passive resistive sensor whose resistance changes predictably with temperature. At room temperature, a functioning probe should read within a specific resistance range. If the probe has failed internally, the resistance may read as infinite (open circuit) or near zero (short circuit), both of which the controller interprets as a fault condition. Wiring faults between the probe and the controller board, such as corroded terminals, loose connectors, or damaged insulation, can produce the same erroneous signals.

Diagnosing Err 001 begins with measuring the probe resistance using a multimeter and comparing the reading to the expected value at a known temperature. The connection points at both the probe end and the controller harness connector should also be inspected for corrosion, heat damage, or mechanical looseness. If resistance and wiring check out, the controller board itself may be misreading the signal, though this is a less common cause.

Source: manufacturer service documentation.

Common causes of Err 001

  1. 01

    Failed temperature probe

    Part replacement

    The probe itself has developed an open or short circuit internally, causing it to send an out-of-range resistance signal to the controller. Measuring the probe resistance with a multimeter will confirm this if the reading is significantly outside the expected range.

  2. 02

    Loose or disconnected wiring connector

    Wiring / connection

    The connector linking the temperature probe to the controller harness may have worked loose due to vibration or thermal cycling. Inspect both the probe terminal and the controller board connector for secure seating.

  3. 03

    Corroded or damaged probe terminals

    Wiring / connection

    Heat and moisture over time can corrode the probe terminals or the connector pins, increasing resistance at the connection point and producing a false fault reading. Visual inspection will often reveal discoloration or buildup at the terminals.

  4. 04

    Damaged probe wiring

    Part replacement

    The wiring between the probe and the controller can suffer insulation damage from prolonged heat exposure, leading to shorts or intermittent open circuits. Check the wire routing for any sections in contact with hot oven components.

  5. 05

    Faulty controller board

    Part replacement

    In cases where the probe and all wiring test within specification, the controller board may have a defective input circuit that is misinterpreting the probe signal. This is the least common cause and should only be considered after the probe and wiring are confirmed good.

See the test procedure for each cause

Frequently asked questions about Err 001

What does Err 001 mean on a Moffat oven?
Err 001 indicates that the oven controller has detected a fault with the temperature probe, the sensor that monitors internal cavity temperature. The controller reads the probe as an RTD (resistance temperature detector) and flags this error when the resistance value falls outside the acceptable range. This typically means the probe has failed, a wiring connection is loose or corroded, or the probe circuit has an open or short condition.
Can I fix Err 001 on my Moffat oven myself?
Some causes of Err 001 are within reach of a knowledgeable DIYer. Checking and reseating wiring connectors or replacing the temperature probe are relatively straightforward tasks if you are comfortable working with appliances. However, if the fault traces back to the controller board, professional repair is recommended. Always disconnect power before inspecting any internal components.
Is it safe to use my Moffat oven when Err 001 is displayed?
No, you should not attempt to use the oven while Err 001 is active. Without a functioning temperature probe, the controller cannot accurately regulate oven heat, which creates a risk of overheating or erratic operation. Stop using the oven and diagnose the fault before resuming cooking.
Will resetting my Moffat oven clear the Err 001 code?
A power reset by turning off the oven at the circuit breaker for a few minutes may temporarily clear the error display, but the code will return if the underlying fault is still present. A reset does not repair a failed probe, damaged wiring, or a faulty connection. The root cause must be identified and corrected for the error to be permanently resolved.
How much does it cost to repair Err 001 on a Moffat oven?
If only the temperature probe needs replacement, parts and labor typically fall in the range of $75 to $200 depending on the specific model and local labor rates. If the controller board is at fault, repair costs can range from $200 to $450 or more. Getting a diagnostic assessment from a qualified technician before ordering parts will help avoid unnecessary expenses.

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