1. Dirty or wet spark electrode (gas — clicks but won't light)
What it is: Every gas burner has a ceramic-tipped electrode that throws a spark to ignite the gas. Food spillover, water from a boil-over, or grease on the electrode shorts the spark to ground — you hear clicking, but no flame catches. Symptom: one burner clicks endlessly with no light, or every burner clicks when only one knob is turned (a wet electrode on ANY burner makes the whole cooktop click). We find this on roughly 4 in 10 'gas burner won't light' calls.
Fix: Pull burner cap and head, scrub electrode tip with a soft toothbrush (no metal), verify burner ports are clear, reseat cap squarely. Test ignition on every burner.
Typical all-in: DIY · $0 if it's a cleaning
2. Failed surface element (electric coil)
What it is: Electric coil burners (Whirlpool / Frigidaire / GE / Maytag plug-in coil platforms) open up after 6–10 years — the nichrome wire inside cracks. Symptom: one coil never gets hot, or only one half (the 'inner' or 'outer' loop of a dual-zone coil) heats. The 5-minute swap test (move a known-good coil to the dead spot) confirms it on the first try.
Fix: Swap-test to confirm element vs receptacle, replace OEM surface element. Always inspect the porcelain receptacle for arc burns — burned receptacles take out new elements within weeks.
Typical all-in: $245–$365 all-in
3. Failed infinite switch (electric — knob behind the cooktop)
What it is: The infinite switch behind each surface knob cycles power to the element. When it fails open, the element never heats; when it fails closed, the element runs full power and won't shut off (a safety problem). Symptom: one specific burner dead at every setting; the swap test rules out the element. Common across every electric brand at year 8+.
Fix: Pull the cooktop / range backsplash, test switch continuity at OFF / LO / HI, replace OEM infinite switch. Verify the burned receptacle isn't dragging the new switch down.
Typical all-in: $245–$365 all-in
4. Cracked radiant element (glass-top — visible crack or open coil)
What it is: Glass-top ranges use radiant elements under the ceramic surface. The coiled element can crack from thermal shock (cold water onto a hot burner) or simply age out. Symptom: one burner ring stays cold or only partially glows, often a hairline crack visible in the coil when on in a dim kitchen. Whirlpool / GE / Frigidaire / Samsung NE glass-tops are the most-frequent service.
Fix: Lift the glass top (requires special suction-handle / two techs on large ranges), inspect element, replace OEM radiant. Verify the glass-top thermal limiter and the surface control board.
Typical all-in: $285–$425 all-in
5. Failed gas valve / safety valve (gas — won't light, no clicking)
What it is: If the knob turns but you hear no clicking AND no gas hiss, the burner's safety valve or the spark module isn't firing. On modern sealed-burner cooktops (KitchenAid / Whirlpool / Samsung / GE), this is usually the spark module or a failed switch in the knob assembly. On older units, a failed safety valve.
Fix: Test spark module 120V input and click output, test knob switches for closure, replace OEM as found. Verify gas supply (other burners light, range gas shutoff is open).
Typical all-in: $285–$425 all-in
6. Failed induction zone or generator board (induction)
What it is: Induction cooktops (Bosch, KitchenAid, Samsung NZ, LG, GE Profile) use a generator board to drive each zone's coil. When one zone's generator board fails, that zone shows a fault code (F47, E2, etc.) or just doesn't respond to a touch. Symptom: one zone dead, others fine, sometimes a fan that won't shut off. Common on induction units past year 5.
Fix: Read fault log, test generator board outputs, replace OEM generator board. On Bosch and Samsung, the board is zone-specific — confirm part number against the dead zone.
Typical all-in: $385–$565 all-in
7. Burned surface element receptacle (electric coil — the part the coil plugs into)
What it is: Loose coil-to-receptacle contact arcs over time, burns the receptacle terminals, and either kills the element or runs the new element hot enough to fail in weeks. Symptom: swap test confirms the receptacle is dead, you can see black burn marks at the contact points. Common at year 10+ on Whirlpool / Frigidaire / GE coil platforms.
Fix: Replace OEM receptacle (sometimes called the surface unit kit), trim wire ends back to clean copper, secure new terminal block. Always paired with a fresh element on the same burner.
Typical all-in: $265–$385 all-in
8. Failed surface control board (rare — last suspect)
What it is: Past everything above, the surface control board has failed to drive the relay for one specific burner. We find this on under 5% of 'one burner out' calls — usually after a power surge or a long-term boil-over that wicked into the control bay. Most common on Samsung NE / NX glass-tops and GE Profile.
Fix: Verify relay-call voltage at the failed burner output, replace OEM surface control board. Always confirm the element / switch / receptacle are good before swapping a $250 board.
Typical all-in: $385–$565 all-in