Lights Then Dies · Thermocouple · Gas Pressure · Wind Sensor · LA Same-Day
Patio Heater Flame Out Repair Los Angeles
Lights initially then flames out, runs briefly then dies, won't stay lit through normal operation. Same-day diagnostic across LA, Orange, Ventura, San Bernardino, Riverside. $120 outdoor diagnostic, waived with repair. (424) 325-0520
Our Branches
8 service territories across Southern California
Patio Heater Flame Out Repair
Southern California
Flame-out service
Lights, then dies. Different from "won't ignite." About 30 to 40 percent of flame-out calls resolve at $120 plus thermocouple replacement.
Flame-out is mechanically distinct from not-igniting. Not-igniting means the unit never lights at all (covered on our not-igniting page). Flame-out means the unit lights initially, runs for seconds to minutes (sometimes longer), then flames out. The diagnostic logic is different because something in the system was working long enough to establish a flame.
Top causes cluster around five mechanisms. (1) Thermocouple weak signal, year 5 to 7 typical, $220 to $340 replacement. (2) Gas pressure drop mid-cycle (regulator fatigue), $200 to $400 regulator referral. (3) Gas valve diaphragm leak (year 7 to 10 commercial), $480 to $680 valve replacement. (4) Burner head erosion (commercial duty cycle), $260 to $420 head replacement. (5) Wind sensor false-trip on Bromic Platinum Smart-Heat, $200 to $360 calibration or replacement.
Coastal LA installs (Manhattan Beach, Malibu, Pacific Palisades, Santa Monica, Marina del Rey) see marine layer salt corrosion on gas valve seals starting year 4 to 6, roughly half the inland service life. We test cheap-first sequence on every call. $120 outdoor diagnostic, waived with repair. BHGS #A49573. EPA 608 Universal certified #1346255700410. BBB A+. Phones answered 24/7. Parent: patio heater repair.
Field observations
Top causes of flame-out by frequency.
- Thermocouple weak signal (year 5-7). Lights briefly, runs 30-90 seconds, dies. The thermocouple still generates some signal but not enough to hold the valve open through full operation. Single most common flame-out cause. $220-340.
- Gas pressure drop mid-cycle (regulator fatigue). Lights at startup, runs 5-10 minutes, chokes as flow demand exceeds regulator capacity. Tank regulators year 7-10 typical. $200-400 regulator-side fix.
- Wind sensor false-trip (Bromic Platinum). Auto-shuts at lower than spec wind speed (5-8 mph instead of 12+). $200-360 calibration or replacement.
- Gas valve diaphragm leak (year 7-10 commercial). Flame instability, occasional flame-out, faint gas smell at unit. Bubble test confirms. $480-680 valve replacement.
- Burner head erosion (commercial Schwank, restaurant duty). Year 6+ at 8-14 hr daily. Pitted or warped burner ports. Flame lifts off, dies under wind. $260-420 head replacement.
- Marine layer salt corrosion (coastal year 4-6). Gas valve seal degradation. About half inland service life. Sealed-seam inspection annual on coastal commercial.
- Pilot orifice partial blockage. Pilot lights but burns weak, can't sustain main burner. $120-200 cleaning.
Diagnostic walkthrough
Practitioner sequence on every flame-out call.
- Reproduce the failure. Light the unit, time the flame-out interval (under 90 seconds points to thermocouple, 5-10 minutes points to pressure drop, intermittent points to wind sensor or valve diaphragm).
- Visual flame quality assessment. Strong steady blue at startup (thermocouple suspect) vs lifting/erratic from start (burner or pressure suspect).
- Multimeter test thermocouple under flame. Voltage output during full operation; degradation visible on the meter.
- Manometer gas pressure under load. Inlet pressure with burner at full demand; below-spec triggers regulator-side investigation.
- Wind sensor verification (Bromic Platinum). Anemometer at unit during cutoff; sensor calibration check via service mode.
- Visual burner head inspection (commercial / year 6+). Pitting, warping, port erosion, discoloration; photo documentation for the customer.
- Gas valve bubble test (year 7+). Soap solution at valve seams under operating pressure; diaphragm integrity check.
Honest opinion
Time the flame-out interval. The interval names the cause.
The single most useful diagnostic input on a flame-out call is the customer's stopwatch description of how long the unit ran before dying. Under 90 seconds: thermocouple replacement is the standard fix, $220 to $340. Several minutes to 10 minutes: gas pressure drop investigation, regulator referral $200 to $400. Intermittent (sometimes runs an hour, sometimes dies in 2 minutes): wind sensor on Bromic, valve diaphragm on year 7+ units. We ask this question at the dispatch call and bring the right parts on the truck. Cuts the average flame-out repair from 2 visits to 1.
Pricing
Flame-out repair costs.
$120 outdoor diagnostic, waived with repair. Universal pricing across residential and commercial. Duty cycle (residential 50-200 hr/yr vs commercial 8-14 hr daily) accelerates parts wear timeline; pricing structure stays $120 universal.
| Repair | Typical Cost |
|---|---|
| Diagnostic | $120, waived with repair |
| Thermocouple replacement (most common) | $220 to $340 |
| Wind sensor calibration or replacement (Bromic) | $200 to $360 |
| Burner head replacement (commercial) | $260 to $420 |
| Pilot orifice cleaning service | $120 to $200 |
| Gas valve diaphragm or full valve replacement | $480 to $680 |
| Gas pressure / regulator diagnostic | $120 plus plumber-side $200-400 |
| Coastal sealed-seam annual inspection | $160 to $240 |
| Multi-component (year 8+ commercial coastal) | $680 to $980 |
| Warranty | 90 days parts and labor |
FAQ
Flame-out questions.
My patio heater lights, then flames out after 30 to 90 seconds. What's the cause?
Most common: thermocouple weak signal. The thermocouple needs to generate a steady millivoltage from the pilot flame to hold the gas safety valve open. As thermocouples age (year 5 to 7 typical), they still produce some signal during the start-hold period (which is why the unit lights), but the signal weakens as the metal heats and they can't hold the valve open through normal operation. Result: lights, runs briefly, dies. $220 to $340 thermocouple replacement is standard fix. Distinct from a fully failed thermocouple (won't even light).
Lights, runs 5 to 10 minutes, then flames out. Different cause?
Often gas pressure drop mid-cycle, especially on propane (LP) units. Tank regulator fatigue (year 7 to 10 on tank-mount regulators), partial frost on the regulator at higher demand, or upstream regulator restriction. Symptom: unit runs fine at startup with full cylinder pressure, then chokes as actual flow demand exceeds regulator delivery capacity. We measure manometer pressure at the unit inlet under full burner load. If below spec (typically 11 inches WC for natural gas, 28 for propane), regulator referral or replacement, $200 to $400.
It's wind. My Bromic shuts off when a breeze starts.
Bromic Platinum Smart-Heat units have a built-in wind sensor that auto-shuts the unit off when wind exceeds approximately 12 mph (a real safety feature for outdoor gas combustion). The sensor can drift over time and false-trip at lower wind speeds (year 5 to 8). We diagnose with anemometer measurement at the unit during cutoff. If the sensor false-trips at 5 to 8 mph, calibration or replacement runs $200 to $360. Some installs benefit from windbreak repositioning rather than parts replacement; we discuss both options.
Gas valve diaphragm leak. What does that look like?
Year 7 to 10 on heavy-duty units (commercial restaurant patios especially). The valve diaphragm controls modulation between full and pilot flame; as the rubber ages, micro-cracks let gas leak past the diaphragm seal during operation. Symptom: flame instability, occasional flame-out, sometimes a faint gas smell at the unit (very small leak). Diagnostic: bubble test at valve seams under operating pressure. Replacement valve runs $480 to $680 installed, but we always check for the cheap fixes first.
Burner head erosion on a 6-year commercial Schwank. Real?
Yes, real, and we see it on Schwank Patio and supraSchwank installs at restaurant patios running 8 to 14 hours daily. The burner head ports erode from years of high-temperature operation, gradually changing the flame pattern and stability. Visible as discolored, pitted, or warped burner head. Symptom: flame burns unevenly, occasionally lifts off, flames out under wind or cold-air influence. Burner head replacement runs $260 to $420 for the part plus install. On year 10+ commercial units we discuss whether full burner assembly replacement makes more economic sense than head-only.
Marine layer salt corrosion. Does that affect coastal SoCal?
Yes. Coastal patios in Manhattan Beach, Malibu, Pacific Palisades, Santa Monica, Marina del Rey see salt-air corrosion on gas valve seals and pilot tube fittings starting around year 4 to 6 (about half the inland life expectancy). Symptom: intermittent flame-out as corroded seal allows gas pressure variation. We see gas valve replacement happening 4 to 6 years sooner on coastal installs vs inland. Standard service interval for coastal commercial installs is annual sealed-seam inspection. Worth discussing on any 4+ year-old coastal commercial unit experiencing flame-out symptoms.
What's your warranty?
90 days SDAR labor and parts warranty on the work we perform. Brand component warranties (thermocouple, gas valve, burner) where applicable processed separately. BHGS #A49573, BBB A+ accredited, EPA 608 Universal certified #1346255700410.
Related sub-services and brands
Other patio heater service.
Patio Heater Lights Then Dies? Call Today.
Same-day across LA, OC, Ventura. $120 outdoor diagnostic waived with repair. BHGS #A49573, EPA 608 Universal #1346255700410.