KitchenAid KHMC1857BSS1 microwave Parts

To hard reset your KitchenAid microwave/hood combo model KHMC1857BSS1, unplug it (or switch off the breaker) for about 1 minute, then restore power. After the reset, test heating by microwaving 1 cup of cold water for 2 minutes on 100% power.

Hard reset steps (power cycle)

• Unplug the microwave, or turn the circuit breaker OFF.
• Wait 60 seconds (this clears the control memory).
• Restore power.
• Set the clock if prompted.
• Run a quick heat test: 1 cup (250 mL) water, 2 minutes, 100% power.

If it still will not heat after a reset

A reset fixes control glitches, but it will not fix a failed heating circuit. For KHMC1857BSS1, these are common no-heat or no-run checks:

• Confirm the door closes firmly; a door not fully latched can prevent operation.
• Check the home breaker or fuse; reset/replace if tripped or blown.
• If the unit runs but does not heat, heating components may be involved (high-voltage parts should be handled by a qualified technician).

Parts commonly involved (when symptoms match)

Symptom	Common area to check	Example part for this model
Runs but no heat	High-voltage circuit	Microwave high-voltage diode W11256462
Dead or intermittent	Door safety circuit	Microwave door interlock switch W10269458
Runs then stops or overheats	Thermal protection	Microwave magnetron thermostat W10598693

Settings that can look like a “reset” issue

Some KHMC1857BSS1 features can change behavior without being a failure:

• Demo mode: lets you use controls without heating.
• Filter reset: clears the filter status reminder after cleaning/replacing filters.

We recommend checking the control settings and options in the owner's manual if the display or behavior seems unusual.

Why it matters

A proper hard reset quickly separates a temporary control glitch from a real problem with the door interlock, power supply, or heating system. The 2-minute water test is the fastest, most reliable confirmation.

Last updated: February 2026

On a KitchenAid KHMC1857BSS1 microwave/hood combo, an F2E1 code points to a keypad or user interface (touch panel) input problem, or a related control or wiring issue. Start by resetting power at the breaker for 1 minute, then watch the display for about 1 minute to see if the code returns.

Quick reset and checks

• Turn the circuit breaker for the microwave OFF for 1 full minute.
• Turn the breaker back ON.
• Do not press any keys for 60 seconds; watch for the code to reappear.
• If the code returns, press each key once to check for a stuck or non-responsive key.
• If the keypad seems to “type by itself” or beeps randomly, stop using the microwave and schedule service.

What usually causes F2E1

F2E1 is most commonly tied to the touch input path. On over-the-range units like this, steam, grease, and heat can also contribute to keypad issues over time.

Likely area	What you may notice	Typical next step
Keypad/user interface	Some keys do not respond, or act stuck	Power reset; then service if it returns
Control board communication	Code returns quickly after reset	Service diagnosis
Wiring/connector issue	Intermittent code, especially after door slams	Service diagnosis

Parts and service notes (what we recommend)

Because this code involves the control system, we recommend using the troubleshooting guidance in the owner's manual and having a qualified technician diagnose the exact failed component before ordering.

If you are also seeing door-related messages or the unit will not start, a door switch problem can sometimes overlap with control symptoms. These are common wear items on microwave/hood combos:

• Microwave door interlock switch W10269458
• Microwave door interlock switch W10269460
• Microwave door switch W10727360

Why it matters

The keypad and control system manage cooking power and safety interlocks. When the microwave detects invalid or stuck key input, it can disable normal operation to prevent unintended heating.

Last updated: February 2026

The KitchenAid KHMC1857BSS1 is an over-the-range microwave/hood combo; the exact overall dimensions and required cabinet clearances are provided in the model-specific installation guide. Use those measurements for a guaranteed fit because they include mounting and venting requirements.

Where to find the exact dimensions

The installation document is the right source for width, height, depth, and the cabinet cutout and hole pattern.

• Open the installation guide and look for “Product dimensions” or “Overall dimensions”
• Verify the required cabinet width and upper cabinet depth
• Check the minimum clearance above the cooktop listed for this model
• Match the upper-cabinet bolt hole pattern and rear-wall mounting plate layout
• Confirm venting option: top vent, rear vent, or recirculating (duct routing and clearances can change)

Typical planning ranges (not the KHMC1857BSS1 spec)

These ranges help you estimate fit while you pull the exact numbers from the guide.

Measurement	Typical over-the-range microwave range
Width	About 30 in
Height	About 16 to 17 1/2 in
Depth	About 15 to 17 in

Why it matters

Using the KHMC1857BSS1 installation dimensions prevents common install problems like misaligned upper-cabinet bolt holes, blocked venting, or insufficient cooktop clearance.

Last updated: February 2026