
September 2026
Blodgett BDO-100-G-ES gas convection oven
ProblemThe oven would sometimes stop heating.
What we didOur technician repaired the oven's start and gas ignition system, finishing on a return visit once the ordered part arrived.
✓ Repaired

Commercial Kitchen · Convection Oven Repair · Fan, Igniter & Thermostat Diagnostic
Blodgett Mark V, Vulcan VC4/VC6, Southbend Marathoner Gold across LA, OC, Ventura. $120 commercial diagnostic. BHGS #A49573.
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10 service territories across Southern California
01 · Convection oven service
A commercial convection oven that won't ignite, heats unevenly, or won't hold temperature usually traces to one of three patterns our techs at Same Day Appliance Repair diagnose first across LA's restaurants and bakeries running Blodgett Mark V and ZEPHAIRE, Vulcan VC4 and VC6, Southbend Marathoner Gold, and Garland convection ovens. (1) Convection fan motor wear (year 6-9), the most common service item, worn bearings drop fan RPM so air stops circulating and the oven heats unevenly; $480 to $720, and on the belt-driven Blodgett Mark V a slipping or stretched drive belt ($180 to $280) causes the same symptom. (2) Igniter failure on gas models (year 5-8), the spark electrode pits and won't light reliably; $180 to $320, we multimeter-test it before condemning. (3) Door gasket compression (year 4-7) leaking heat past the seal, or thermostat drift cycling the oven off early. $120 commercial diagnostic, waived with repair. Gas valve and gas-line work runs under our BHGS #A49573.
Commercial convection ovens (Blodgett Mark V and ZEPHAIRE, Vulcan VC4 and VC6, Southbend Marathoner Gold, Garland Master Series, Bakers Pride Cyclone) are the dominant convection equipment in Los Angeles, Orange, Ventura, Santa Barbara, San Bernardino, Riverside, and San Diego restaurant and bakery kitchens. Mid-tier commercial price ($3,000 to $12,000 new). Most common type. Most accessible parts pipeline.
The failure modes are predictable. Convection fan motor at year 6 to 9. Drive belt wear (Blodgett Mark V specifically, belt-driven fan adds a routine wear item). Igniter on gas models at year 5 to 8. Door gasket compression at year 4 to 7. Thermostat drift over time. None of these are catastrophic. All are repairable through year 15 to 18 of service life with annual maintenance.
We service convection ovens across all seven Southern California counties. $120 commercial diagnostic, waived with repair. BHGS #A49573. EPA 608 Universal certified (#1346255700410).
02 · Common convection oven failures
Across the commercial convection oven service calls our techs at Same Day Appliance Repair dispatch in LA, the work clusters predictably, and the failure modes are refreshingly accessible. About 30 percent convection fan motor (year 6-9, the single most common service item). 15 percent drive belt wear on belt-driven Blodgett Mark V units. 15 percent igniter on gas models (year 5-8). 15 percent door gasket compression (year 4-7). 10 percent thermostat drift. 10 percent gas valve coil, flame sensor, or thermocouple. 5 percent heating element on electric models. The ranked list below walks each, and we measure fan-motor amperage and RPM before condemning a motor.
03 · Recent convection oven repairs
Four convection oven jobs from the past 90 days. Names omitted; the technical scenarios are typical of what we see weekly.
Uneven bake, top rack cooking faster than bottom. Diagnosed: convection fan bearings worn (reduced RPM) plus drive belt stretched. Replaced fan motor and drive belt as a paired set (always replace together on Mark V, mismatched belt and motor fails again within months). Total: $120 + $580 motor + $120 belt + $30 supplies = $850.
Won't ignite reliably. Diagnosed: spark igniter electrode pitted plus thermostat drift (reading 25°F low). Replaced igniter and thermostat, recalibrated. Total: $120 + $280 igniter + $260 thermostat = $560 (labor included in part pricing on this size job).
Oven won't fire when door is closed normally but will fire if door is held in a specific position. Diagnosed: door switch interlock contacts worn. Replaced switch. Total: $120 + $260 switch + $60 labor = $440.
Loud noise from convection chamber. Diagnosed: fan motor bearings end-of-life. Replaced fan motor with OEM Bakers Pride part. Total: $120 + $480 motor + $80 supplies = $680. Customer set on annual maintenance to catch the next failure earlier.
04 · Honest scope
We service: Blodgett Mark V and ZEPHAIRE, Vulcan VC4 and VC6, Southbend Marathoner Gold, Garland Master Series, Bakers Pride Cyclone, plus comparable mid-tier convection ovens. Gas and electric. Single and double-stack configurations. Convection fan and motor service, drive belt replacement, igniter, thermostat, door gasket, door switch, heating element.
We don't do:
05 · Pricing
Diagnostic is $120 (commercial tier), waived with repair. Written estimate before any repair work begins.
| Repair | Cost |
|---|---|
| Diagnostic | $120, waived with repair |
| Convection fan motor | $580 to $850 |
| Drive belt (Blodgett Mark V) | $180 to $280 |
| Igniter (spark or hot-surface) | $280 to $440 |
| Thermostat / temperature controller | $320 to $480 |
| Door gasket | $320 to $480 |
| Door switch / interlock | $240 to $380 |
| Heating element (electric) | $580 to $880 |
| Annual maintenance contract | $280 to $440 per visit |
| Multi-component repair | $900 to $1,800 |
| Warranty | 90 days parts plus labor |
06 · Brands
07 · Why operators call us
Sister sub-services: combi oven repair, rotisserie oven repair. Overview: commercial oven repair.
A real job from our service records, named with the business owner’s permission.

September 2026
ProblemThe oven would sometimes stop heating.
What we didOur technician repaired the oven's start and gas ignition system, finishing on a return visit once the ordered part arrived.
✓ Repaired
08 · FAQ
Most common cause on gas convection ovens: igniter failure (year 5 to 8 typical). On Vulcan VC4 and VC6, the spark igniter electrode pits and stops sparking reliably. Replacement runs $180 to $320. Less common: failed gas valve coil, flame sensor coated with combustion residue, thermocouple weak. We diagnose with multimeter test on the igniter, gas pressure check, and visual inspection of the burner assembly.
Yes. Blodgett Mark V is one of the most common LA bakery and restaurant convection ovens. Common service: convection fan motor (year 6 to 9), drive belt wear (Mark V uses belt-driven fan, replacement $180 to $280), thermostat, door gasket. ZEPHAIRE service tree is similar with stronger door hinge components. See Blodgett oven repair brand page.
12 to 18 years with proper maintenance. Heavy-use bakery ovens skew toward 12, lower-volume restaurant ovens to 18+. The convection fan motor is usually the limiting component (year 6 to 10 typical wear). Brass burner ovens (Vulcan VC, Southbend Marathoner Gold) outlast cast iron alternatives. Door gasket is a routine replace at year 4 to 7 across all brands.
Most likely the convection fan is not circulating air effectively. Possibilities: fan motor speed reduced from worn bearings (motor still runs but at lower RPM), drive belt slipping or stretched (Blodgett Mark V especially), or fan blade itself loose on the shaft. Also check door gasket compression, a leaky door drops oven temperature on the door side. We diagnose with infrared thermometer at multiple rack positions and fan RPM measurement.
Yes. Annual contracts include door gasket inspection, fan motor amperage measurement, igniter and burner inspection (gas), thermostat calibration, drive belt tension check (where applicable). Contract pricing reduces per-visit cost vs reactive scheduling. Bakery and high-volume restaurant operations especially benefit from annual contracts because the failure modes are predictable.
Honest answer. Vulcan VC4 and VC6 (ITW Food Equipment Group) have the broadest LA install base and the most accessible parts pipeline through ITW distribution. Blodgett Mark V (Middleby) is the bakery favorite for even bake but has the belt-drive fan that adds a routine wear item. Southbend Marathoner Gold (Middleby) sits between, slightly less common in LA. All three are repairable through year 15+ with parts availability. We don't push customers toward any specific brand, we work with what you have.
90 days SDAR labor warranty on every repair. Component manufacturer warranties (Vulcan, Blodgett, Southbend, Garland) processed separately through the manufacturer's authorized network. BHGS #A49573. EPA 608 Universal certified (#1346255700410).
The Blodgett Mark V uses a belt-driven convection fan, unlike most convection ovens with a direct-drive motor, so the drive belt is a routine wear item the Mark V has that other brands don't. The belt slips or stretches over time, and once it does the fan loses RPM and the oven heats unevenly even though the motor still runs. Belt replacement runs $180 to $280, much cheaper than a fan motor, which is why we check belt tension first on a Mark V before condemning the motor. We include a belt-tension check in annual maintenance on Mark V units. Same Day Appliance Repair, $120 commercial diagnostic, waived with repair.
On a commercial convection oven, temperature that won't hold the set point is usually thermostat drift, the control cycles the oven off before it reaches temperature or lets it swing through service, or, on a gas model, a weak gas valve or a flame sensor coated with combustion residue. A leaking door gasket (year 4-7) also drops temperature on the door side. We verify with an infrared thermometer at multiple rack positions and a gas-pressure check before recalibrating or replacing the thermostat. Brass-burner ovens like the Vulcan VC and Southbend Marathoner Gold hold calibration longer than cast-iron alternatives. Same Day Appliance Repair, $120 commercial diagnostic, waived with repair.
Blodgett, Vulcan, Southbend specialists. BHGS #A49573. $120 commercial diagnostic. Same-day across LA, OC, Ventura.