Failure mode · Spark Module · Electrode · Cap Alignment · Gas Valve
Residential gas cooktops across LA, OC, Ventura, Riverside. About 30% of these calls resolve at the diagnostic with cap re-seat plus cleaning, no parts. $89 diagnostic, waived with repair. (424) 325-0520
8 service territories across Southern California
Gas Cooktop Burner Repair
Southern California
01 · Customer-side first checks
Three things to try before booking a service call. (1) Re-seat the burner cap. The cap and head must align exactly, even a 1mm offset distorts gas flow and the burner appears to fail. Lift, rotate, set down flush. (2) If you cleaned the cooktop or had dishwasher splash recently, the spark electrode might be wet. Dry it 30 minutes. (3) Confirm the gas supply: another burner lights, or you smell gas faintly when you turn the knob (gas is flowing, ignition is the issue).
If those don't resolve it, the failure tree is short: spark module, electrode, or gas valve. We test in that order at the diagnostic. BHGS #A49573, EPA 608 Universal certified (#1346255700410). Phones answered 24/7.
02 · Spark module failure
The spark module is a single electronic unit that drives all the burner electrodes. When it weakens or fails, you'll see one of two patterns: (1) one burner won't click while the others do (rare, usually wiring at that one electrode); (2) all burners click together when any knob is turned but no ignition (module driving them all but at insufficient energy).
Diagnostic: test module output voltage and frequency at the diagnostic. Healthy module produces a strong, regular spark; weak module produces erratic or low-energy sparks visible to the eye. Replacement $260 to $420 mid-tier, $380 to $580 pro-style.
03 · Spark electrode (ceramic igniter)
The electrode is a ceramic-encased metal pin that sits next to each burner. The module sends a high-voltage pulse to the electrode tip; the spark jumps to ground (the burner cap), igniting gas. Failure modes: ceramic cracked (often from impact, like a heavy pot dropped on the cap), tip fouled with cooked spillover, or wet from cleaning.
Cleaning resolves about 60% of "weak spark" cases at the diagnostic. Replacement $200 to $340 per zone if the ceramic is cracked or the tip is corroded past cleaning.
04 · Pro-style sealed-burner architecture
Pro-style cooktops (Wolf SRT, Viking VGSU, Thermador Masterpiece, BlueStar RBCT, Capital) use sealed-burner construction (gas ports sealed at the base to prevent spillover from entering the cooktop body) and premium spark modules. The diagnostic test sequence is identical to mid-tier; only the parts cost differs.
Pro-style spark module: $380 to $580. Pro-style electrode: $260 to $440 per zone. Worth the cost on a $4,000 to $8,000 cooktop designed for 18 to 25 year service. Don't replace a year-7 Wolf cooktop because the spark module failed; replace the module.
05 · Recent jobs
Composite examples; model numbers, ages, and prices are accurate to typical scope.
Single front-left burner not lighting; other three fine. Diagnosed: ceramic electrode cracked at the tip (likely from a dropped pot). Replaced electrode, tested ignition cycle. Total: $89 plus $230 part plus 45 minutes = $290.
All burners clicking together but only two igniting. Diagnosed: spark module output dropping below ignition threshold. Replaced module (Wolf OEM), tested all five burners. Total: $89 plus $440 module plus 1 hour = $560 (premium parts but identical diagnostic logic to mid-tier).
All burners clicking on every knob turn. Module issue. Replaced module, calibrated ignition timing. Total: $89 plus $480 module plus 1 hour = $560.
Customer reported "burner won't light" after running dishwasher next to the cooktop. Spark electrode wet from splash. Dried, retested, working. No parts. Total: $89 diagnostic only. Customer kept the dishwasher's wash arm pointed away from the cooktop afterward.
Two burners with weak ignition. Both electrodes corroded at the tip (sealed-burner architecture is generally cleaner but coastal salt air still affects electrode metal over years). Replaced both electrodes. Total: $89 plus $480 parts plus 1.5 hours = $580.
06 · Honest opinion
The most expensive avoidable mistake on burner-not-igniting calls: replacing the gas valve when the actual problem is a weak spark module or fouled electrode. Module $260 to $420, valve $440 to $680. Online forums full of customers who paid for valve replacement when the module would have fixed it.
About 30% of these calls resolve at the diagnostic with cap re-seat plus port cleaning, no parts. We charge $89 diagnostic and bill nothing else when that's the answer. The other 70% are module or electrode work.
07 · Pricing
| Service | Cost |
|---|---|
| Diagnostic visit | $89, waived with repair |
| Cap re-seat plus port cleaning (no parts) | $89 diagnostic only |
| Spark module (mid-tier) | $260 to $420 |
| Spark module (pro-style) | $380 to $580 |
| Spark electrode per zone (mid-tier) | $200 to $340 |
| Spark electrode per zone (pro-style) | $260 to $440 |
| Burner head replacement | $200 to $440 |
| Gas valve safety (rare) | $440 to $680 |
| Multi-component repair | $500 to $900 |
| Warranty | 90 days parts and labor |
Residential $89 diagnostic, applied toward repair. About 30% of these calls resolve at the diagnostic with no additional parts.
08 · Why us
Sister sub-services: electric element failure, induction not working, surface cracked. Parent: cooktop repair. Related: range repair, stove repair. Credentials: BHGS license, EPA 608.
09 · FAQ
Click means the spark electrode is firing. If you see the click but no flame, three causes in order of likelihood: (1) burner cap misaligned, the cap and head must seat exactly, even a small offset disrupts gas flow; re-seat and try again. (2) Spark electrode fouled or wet, common after cleaning or dishwasher splash, dry it 30 minutes. (3) Spark module has weakened, sparking but not at the energy needed to ignite gas. We test module output at the diagnostic.
Spark module. Modules drive multiple burners simultaneously when one knob is turned, then individual burner switches isolate which one actually fires the gas valve. When all click together but the activated burner won't light, the module is firing but losing energy to the dead burner's electrode. Module replacement $260 to $420. Diagnostic confirms by isolating each electrode.
Yes. These pro-style sealed-burner cooktops use premium spark modules and ceramic electrodes. Module replacement runs higher than mid-tier ($380 to $580 versus $260 to $420), but the diagnostic logic is identical: test module output, test electrode resistance, check cap alignment, verify gas valve function. We carry common Wolf and Viking ignition components on the van.
Yellow flame means incomplete combustion, almost always a clogged burner port (food spills baked into the brass). Cleaning resolves most cases at the diagnostic. If burner ports are damaged from corrosion (year 10+ unit, especially if hood ventilation was undersized), burner head replacement is needed, $200 to $440 depending on brand.
$89 diagnostic, applied toward repair. About 30% of 'won't light' calls resolve at the diagnostic with cap re-seat plus port cleaning, no parts billed. The other 70% are spark module ($260 to $420), electrode ($200 to $340 per zone), or rare gas valve ($440 to $680). We quote on-site after diagnosis.
90 days parts and labor on every repair. BHGS #A49573, EPA 608 Universal certified (#1346255700410), BBB A+ accredited.
$89 residential diagnostic, waived with repair. Same-day across LA, OC, Ventura. About 30% of these calls resolve with no parts. BHGS #A49573, EPA 608 Universal certified (#1346255700410).