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KitchenAid Microwave

KitchenAid KHMS1850SSS

Model # KHMS1850SSS

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The KHMS1850SSS is a KitchenAid microwave oven. No published specification for this model was recovered, so there is no dimension or capacity quoted on this page. A number lifted from a sibling model would be worse than silence. It was on KitchenAid’s US product site from September 2011 to May 2012 and gone after that.

KitchenAid appends a production-revision code to the base number on the rating plate, and the codes actually observed for this model are KHMS1850SSS0, KHMS1850SSS1, KHMS1850SSS2. A plate reading one of those is still a KHMS1850SSS; the suffix identifies which production revision you have, and it occasionally decides which version of a part fits. That puts a KHMS1850SSS roughly ten to fifteen years into service, the point at which the door latch, the interlock switches and the turntable drive tend to need attention. Being out of production, a KHMS1850SSS has its parts position checked at the outset rather than after a diagnosis.

Key Features

  • No published specification for this model was recovered
  • Recorded on KitchenAid's US product site from September 2011 to May 2012
  • Rating-plate revision codes observed for this model: KHMS1850SSS0, KHMS1850SSS1, KHMS1850SSS2
  • A KitchenAid owner's manual for this model is on record

Most Common Issues on This Model

01

Door hinge and latch wear, so the door sits proud of the frame and the interlocks no longer line up

02

Exhaust fan noise or failure, where the unit is installed over a range

03

Grease and charcoal filters left unchanged, which shows as poor extraction and a labouring fan

04

High-voltage component failure, which is bench work for a technician rather than anything an owner can inspect

Error Codes Common to This Model

Registration Error

KitchenAid Over-the-Range Microwave Registration Error Message

Flashing ":" or PF in display

KitchenAid Over-the-Range Microwave Flashing Colon or PF Display

FC E8

KitchenAid Over-the-Range Microwave FC E8 Error Code (Registration)

F3T4

KitchenAid Over-the-Range Microwave F3T4 Error Code (Magnetron Temperature Thermistor)

F4E1

KitchenAid Over-the-Range Microwave F4E1 Error Code (Cavity Temperature Thermistor)

F4E4

KitchenAid Over-the-Range Microwave F4E4 Error Code (Humidity Thermistor)

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FAQ

KitchenAid KHMS1850SSS FAQ

KitchenAid gives the location for its microwave ovens as inside the door, and that is where the KHMS1850SSS plate sits. It is an adhesive label, typically silver on major appliances, carrying the model number and the serial number together. Read the whole KHMS1850SSS string off the label rather than from memory, because it sits in a family of very similar numbers.

Production of the KHMS1850SSS ended some time ago. That does not rule out a repair - the wear items are largely shared across a generation - but it does mean the parts question on a KHMS1850SSS is settled before any figure is put on the work.

It usually means an interlock switch or a high-voltage component has failed. With the KHMS1850SSS unplugged at the wall, the door latch and interlocks are what a technician checks first. Nothing behind the outer casing of a KHMS1850SSS is owner-serviceable, because components in there hold a charge even after the oven is unplugged.

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