Kenmore 79040459803 electric oven Parts

To tell how old your Kenmore wall oven model 79040459803 is, we use the serial number from the oven’s rating plate and decode the date code (the model number identifies the product line, but the serial number is what dates the unit). For exact label location and access, check the 79040459803 owner's manual.

Where to find the information you need

Look for the model and serial tag in common wall-oven locations:

• Along the oven frame behind the door (open the door and check the side trim)
• On the lower front frame area near the door opening
• Sometimes behind the lower vent trim area (access varies by installation)

If the oven is built-in tight, the 79040459803 installation guide helps you understand clearances and safe access before you try to pull the oven.

How Kenmore dating works (what to decode)

Kenmore is a brand label; the manufacturer and serial format determine the date.

What you have	What it tells you	What we do with it
Model number (79040459803)	Series and configuration	Confirms you are shopping the right parts list
Serial number (letters and numbers)	Build date code	Decode to find month and year
Rating plate location	Where to read it safely	Use manual guidance to access it

Quick steps to decode the age

• Write down the full serial number exactly as shown
• Note any letters at the beginning (often indicate plant or series)
• Decode the date portion using the manufacturer’s serial scheme
• If you are ordering parts, match the full model number and keep the serial handy

Why it matters

Knowing the build date helps us match the correct Kenmore parts revisions (for example, control components, wiring harness versions, or an oven temperature sensor) and prevents ordering a part that looks right but does not fit your production run.

Last updated: February 2026

To identify your Kenmore oven model, open the oven door and look for the model and serial plate on the interior side trim. For Kenmore model 79040459803, that plate is visible with the door open and lists the model number you need for parts and service.

Where to find the model number (fast checklist)

• Open the oven door fully.
• Look along the interior side trim (the vertical trim just inside the oven frame).
• Find the serial plate label.
• Record the model number and serial number exactly as shown.
• Use that model number when ordering parts or checking installation requirements.

What to write down (and why)

The serial plate typically includes several identifiers. Capture these so we can match the correct Kenmore wall oven parts and wiring requirements.

Item on serial plate	What it’s used for
Model number	Correct parts lookup and diagrams
Serial number	Production details for service
Lot number or letter	Helps match revisions/variations
Wattage rating	Helps determine circuit breaker/fuse sizing

Why it matters

Kenmore wall ovens can look similar across multiple series, but parts like an oven temperature sensor, terminal block, or door lock assembly can vary by model and revision. Using the exact model number prevents ordering the wrong component and helps confirm electrical requirements.

Helpful references for this model

• Use the 79040459803 installation guide to confirm serial plate location and electrical requirements.
• Keep the 79040459803 owner’s manual handy for operation details and feature-specific instructions.

Last updated: February 2026

An electric wall oven like Kenmore model 79040459803 is built around heating, temperature sensing, lighting, airflow, and safety components. The core parts you will interact with most are the bake and broil elements, oven temperature sensor, door and light components, and the electrical connection hardware listed in the 79040459803 installation guide.

Main parts you will find in most electric wall ovens

• Bake element: lower heating element used for most baking.
• Broil element: upper heating element used for high-heat broiling.
• Oven temperature sensor: tells the control how hot the oven is; a common cause of inaccurate temps.
• Oven light system: bulb, socket, and lens so you can see inside the cavity.
• Door components: hinges, handle, and (on some models) a door lock for self-clean.
• Vent and trim pieces: help direct heat and protect surrounding cabinetry.
• Electrical connection parts: terminal block, wiring, and junction box connections.

Model 79040459803 parts you can replace (examples)

These are common service parts for this model:

What it does	Part you may need	When it is commonly replaced
Lights the oven cavity	Appliance light bulb, 40-watt 316538904	Light does not turn on, bulb is darkened or broken
Measures oven temperature	Range oven temperature sensor 5304504897	Oven runs hot/cold, temperature swings, error symptoms
Provides baking heat	Frigidaire range bake element 318255101	No bake heat, slow preheat, visible damage on element
Supplies safe power connection	Terminal block 5304409888	Burnt wires, melted block, intermittent power

Why it matters

Knowing the major parts helps you troubleshoot faster. For example, if the oven will not bake but broil works, the bake element is a top suspect; if temperatures are consistently off, the temperature sensor is often the first part to test.

Safety and installation notes we follow

• Shut off power at the breaker before servicing any electrical part.
• Do not use an extension cord with a wall oven.
• Do not lift the oven by the door handle.
• Use 2 or more people to move or install a wall oven.
• Install anti-tip mounting screws during installation.

Last updated: February 2026

On the Kenmore wall oven model 79040459803, an F3 error typically indicates the oven control is sensing a temperature sensor (probe) problem or an open/short in the sensor wiring, so the oven may stop heating or heat unpredictably until the issue is corrected.

What to check first (safe, quick steps)

• Power reset: Turn the breaker off for 1 minute, then back on; see if F3 returns.
• Cancel the cycle: Press Cancel/Off and let the oven cool completely.
• Look for obvious wiring issues: If you can access the rear safely, check for loose, burned, or pinched wires at the sensor connector.
• Avoid self-clean until fixed: High heat can worsen marginal sensor or wiring problems.
• Confirm the code behavior: Note whether F3 appears during preheat, after reaching temp, or only in Bake/Broil.

Most common fix: temperature sensor circuit

In many Kenmore 790-series ovens, F3 points to the oven temperature sensor circuit. If the sensor is out of range or the harness connection is failing, the control interprets it as an over-temperature or sensor fault.

If replacement is needed for this model, the matching part is the range oven temperature sensor 5304504897.

Quick symptom guide

What you notice	Most likely cause	What we recommend
F3 appears right after starting Bake	Sensor circuit open/short	Inspect connector, then replace sensor if needed
Oven overheats or temperature swings	Sensor drifting out of spec	Replace sensor
F3 comes and goes when door moves	Loose connection or damaged harness	Reseat connector, inspect harness routing

Why it matters

The temperature sensor is the feedback device that tells the control board how hot the oven is. When the control cannot trust that signal, it may shut the oven down, trigger F3, or allow unsafe temperature behavior.

Helpful reference

For model-specific access, wiring routing, and safety steps, use the 79040459803 installation guide.

Last updated: February 2026

For Kenmore model 79040459803, the installation instructions show it fits a 24-inch wall-oven cabinet cutout. The cutout opening is typically about 22 to 23 1/2 inches wide and 27 5/8 inches high for a single oven; always confirm your exact cabinet and clearance requirements in the 79040459803 installation guide.

Key dimensions you should use (cabinet cutout)

These measurements are the most important “size” numbers for planning a replacement or verifying fit.

• Wall-oven size class: 24-inch (cabinet width minimum 24 inches)
• Cutout width range: about 22 to 23 1/2 inches
• Cutout height (single oven): about 27 5/8 inches
• Door clearance when open: allow at least 19 3/8 inches
• Support requirement: cabinet base must support about 150 lb (single oven)

Single vs. double oven sizing (quick comparison)

If you are comparing a single oven to a double oven, the cutout height is the big difference.

Configuration	Wall-oven size class	Typical cutout height range	Cabinet width minimum
Single oven	24-inch	About 27 5/8 inches	24 inches
Double oven	24-inch	About 48 to 49 inches	24 inches

Why the “auction dimensions” can be misleading

Some listings quote overall exterior dimensions for a different 790-series unit (or a double oven), which can look close but still install wrong. For built-in wall ovens, we size by cutout dimensions, door clearance, and junction box location, not just outside height and width.

Fit and safety checks before you buy or install

• Verify the cutout width and height in your cabinet with a tape measure.
• Confirm the door-open clearance so the door does not hit nearby drawers or an island.
• Make sure the cabinet base is strong enough for the oven weight.
• Keep the oven centered using any factory spacers (if equipped).
• Follow the electrical junction box placement guidance in the 79040459803 installation guide.

Last updated: February 2026