Older Monogram rangetops sometimes used a standing pilot rather than electronic ignition, so a pilot that won’t stay lit is diagnosed at the thermocouple and pilot orifice directly — the same approach used on any standing-pilot gas appliance regardless of brand or age.

Compact 12″ rangetops like the ZGU122LPSS are often installed as a supplemental cooking surface next to a main cooktop or range, but the burner and ignition parts are diagnosed exactly the same as on Monogram’s larger rangetops.

The precision simmer burner on the ZGU30RSLSS uses a smaller gas orifice than the other burners to hold a very low flame — when it can’t hold that flame, the orifice and regulator for that specific burner are checked first, since the issue rarely affects the rangetop’s other burners.

With six burners sharing one gas manifold, the ZGU366 occasionally shows a startup lag on certain burners that isn’t present on smaller rangetops — usually a manifold pressure or individual valve issue rather than a problem affecting the whole unit, since the other burners continue lighting normally.

A weak flame at a high setting on a natural-gas rangetop like the ZGU364NR often points to a partially blocked burner port or an incorrect regulator setting rather than a burner that needs full replacement — worth diagnosing before assuming the whole burner assembly has failed.

If you smell gas near a rangetop burner, leave the home and call the gas utility or 911 from outside; clicking without a flame and no odor is routine.