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Model reference

Miele H 7870 BM Built-in Combination Microwave and Convection Speed Oven

Combination microwave and convection oven where sparking, a dead keypad or a stopped turntable are the usual reasons to book.

Reviewed by Miele Repair Editorial Team · Last reviewed November 2, 2026

At a glance

Overview

Model number H 7870 BM
Appliance category Microwave

The H 7870 BM is a built-in combination microwave and compact convection oven 29 13/16 inches wide (757 mm). It runs on 120/208-240 V, 60 Hz and 30 A, and its M Touch display responds to MotionReact when someone walks up to the appliance. A food temperature probe is included, and WifiConn@ct lets the owner follow cooking from a mobile device. This Miele unit joins two cooking methods in one cavity, so a fault can start on the microwave side or the convection side. Across the metro areas we cover, sparking and a keypad that does not respond are the first details to describe. In the booking form, give the symptom, the full model number from the rating label and any code on the display.

Combining a microwave and a compact convection oven in one unit gives two cooking routes, so the owner can choose a short reheat or a slow roast without changing appliances. The linen-textured stainless cavity with a PerfectClean coating is easier to wipe than bare steel, and the roast probe with WifiConn@ct lets the owner follow a joint from another room.

Known problems

Common issues for this model

Sparking inside the cavity

Turntable or light not working

Keypad not responding

Vent fan noise (over-the-range models)

Diagnostics

Related error codes

Helpful notes

Troubleshooting resources

Note whether the light and turntable still work when it fails to heat.

Model-information disclaimer.

Confirm your exact model number and specifications with your appliance documentation before booking a repair. Model pages are for identification and compatibility reference.

FAQ

Frequently asked questions

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At a glance

ModelH 7870 BM
Appliance30-inch built-in combination microwave and convection speed oven
Common symptomssparking inside the cavity; turntable or light not working; keypad not responding; vent fan noise (over-the-range models)
What you can checkNote whether the light and turntable still work when it fails to heat.
When to call a technicianIf the symptom comes back after the simple checks, or you see a code, leaking water or a burning smell, book a visit.

Specifications

DimensionsOverall width is 29 13/16 inches (757 mm).
PowerRequires 120/208–240 V, 60 Hz, 30 A.
FeaturesCombines microwave and compact convection-oven functions. Includes a food temperature probe. WifiConn@ct supports monitoring from a mobile device.
ControlsUses an M Touch display. MotionReact responds when someone approaches the appliance.
CareOven compartment has a linen-textured stainless steel surface with PerfectClean coating.

Service notes for the H 7870 BM

Sparking inside the cavity is a stop-now symptom: switch the oven off at the breaker and leave it unused until a technician has inspected the cavity and its waveguide for damage. A turntable or light that stops can come from a loose drive or socket, which the owner can check by lifting the turntable and reseating it. If the keypad does not respond, note whether the display still lights and whether MotionReact woke the panel. Do not run the microwave empty, and keep metal out of the cavity while testing.

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(844) 459-5005
Hours Mon–Sat: 8:00 AM – 7:00 PM
Service area Serving Miami, New York, Houston, Los Angeles and San Diego metro areas.
Response time Same-day and next-day appointments in most areas.