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Model library · KitchenAid Microwave

KHMS1850S

KitchenAid KHMS1850S Microwave Hood Service

KitchenAid microwave

Most common issues on this model

  1. Worn hinges and latch that leave the door crooked and the interlocks misaligned
  2. Exhaust fan that has turned loud or stopped
  3. Spent charcoal and grease filters that choke extraction
  4. High-voltage part failure, which is technician bench work

A KHMS1850S hangs over the range, and it is also sold as KHMS1850SSS and KHMS1850SWH. Years of opening the door with oven mitts and wet hands take their toll on the hinges, so a door that sits slightly proud of the frame is a typical reason we get called.

Door alignment matters more than it looks. The latch hooks press on safety switches, and when the door drifts, the oven may beep and refuse to start or stop heating halfway. We adjust or replace the worn hinge parts, then test the switches in sequence. After that we look at the vent side: grease screens, the charcoal filter and the blower, because a blocked filter makes the fan loud and weak. If the oven still does not heat, the high-voltage section is tested last, as that is not something an owner should open.

Our price is written down before any work begins, and the repair comes with a 30-day workmanship warranty.

Key features

  • KHMS1850S microwave oven mounted above the range
  • Variants: KHMS1850SSS, KHMS1850SWH
  • Exhaust fan with grease and charcoal filters
  • Discontinued model
→Codes

Error codes this model can show

KHMS1850SKHMS1850S questions
The door of my KHMS1850S no longer closes squarely. Why does the oven stop?

A shifted door can miss one of the safety switches, so the oven stops or will not start. We repair the worn hinge and latch parts, then verify each switch engages.

Is it normal for the KHMS1850S fan to get louder over time?

It happens when the filters fill with grease, forcing the blower to work harder. We clean the screens, replace the charcoal filter if needed, and check the motor for bearing noise.

Can I open my KHMS1850S to look for why it will not heat?

We advise against it. Parts inside stay dangerous after unplugging. We test the door switches first, then the high-voltage section safely discharged, and tell you the cost in writing.

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Book repair for your KHMS1850S

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.

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