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Model library · KitchenAid Microwave

KHMC1857B

KitchenAid KHMC1857B Microwave Oven Service

Schedule Service(713) 903-2606
KitchenAid microwave

Most common issues on this model

  1. A chipped door seal edge that the switches read as an open door
  2. A tube that has lost strength, so heating drags on
  3. An oven that lights up and hums its fan but stays cold because a latch switch has failed
  4. A touch panel whose keys repeat or do nothing

Owners of the KHMC1857B, also listed as the KHMC1857BSP, usually call after the same quiet event: the oven starts, the fan runs, and nothing gets warm. Most of the time that points at the door.

The interlock switches only allow cooking when every one of them agrees the door is shut. A chipped seal face, a sagging hinge or a tired switch can break that agreement. We inspect the seal, test each switch with a meter, and close the door while watching for any play.

If the door passes, the water-load test comes next, then the touch panel. You see the price in writing before we order a part, and the finished repair is backed by a 30-day workmanship warranty.

Key features

  • Base model KHMC1857B
  • Microwave oven category
  • Versions KHMC1857BSP
→Codes

Error codes this model can show

Probe or Insert ProbeKitchenAid Combination Microwave Message "Probe" or "Insert Probe": Seat the meat probe in its jack PUSH or PSHKitchenAid Built-In Microwave Message PUSH or PSH: The oven is waiting for Start Registration ErrorKitchenAid Over-the-Range Microwave Message "Registration Error": Check the home network and try again Sabbath, Sab, 5Ab, or 5A6KitchenAid Built-In Microwave Display Sabbath, Sab, 5Ab or 5A6: Sabbath Mode is on SEKitchenAid Over-the-Range Microwave Code SE: Keypad or user interface problem F4E1KitchenAid Over-the-Range Microwave Code F4E1: Cavity thermistor circuit F9QKitchenAid Over-the-Range Microwave Code F9Q: Reset power and watch for a minute F4E4KitchenAid Over-the-Range Microwave Code F4E4: Humidity thermistor or its wiring
KHMC1857BKHMC1857B questions
My KHMC1857B starts but never warms. Is the magnetron gone?

Rarely the first suspect. A door switch that fails to close gives the same picture. We test every switch and the seal, then judge the tube by a water-load result.

Does a repeating key mean a new panel?

Often it is a worn membrane under the key. We test the pad directly. A replacement panel is ordered only when the membrane has actually failed.

Is the BSP version the same oven?

It is the same oven in another listing. The KHMC1857BSP sits under the KHMC1857B base model, so the internal parts match, and we check the rating plate on site to confirm before we order anything.

Book a visit

Book repair for your KHMC1857B

Book in about a minute, or call the desk. Same-day windows inside the Loop on most days, next-day across the rest of Houston.

(713) 903-2606
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