Try to read the data plate on a NGM8658UC and you will see why we ask owners to keep their paperwork. Bosch fixed that plate to the underside of the appliance, so identifying the machine means lifting the cooktop or finding the documents. As for the cooktop, it is a discontinued 800 Series model: 36 inches wide, five sealed burners, 42,700 BTU.
A photo of the plate taken at installation saves real trouble a decade later, when nobody remembers what was fitted. It matters because parts for similar-looking cooktops are not interchangeable, and a wrong guess from a photo of the top costs time.
With age, the wear is quiet and mechanical. Valve stems stiffen from grease and years, and the electrode leads can chafe as they run through the burner enclosure. We check the knobs and valves first, then trace the leads for rubbing, and confirm the model from your records before ordering anything.
The plate is on the underside, so look for receipts, the manual or an installation photo first. If none exist, we can read the plate during a visit and match parts to the model before ordering.
Usually an electrode lead has chafed or an igniter ceramic has cracked, so the spark finds another path. Turn the burner off and call us. We would trace the lead before ordering parts.
Yes, in most cases. Grease and age stiffen the valve stem. Do not force the knob. We free the stem and test that the burner shuts off cleanly.
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.