WB28K10190 GE Oven Left Front orifice ā¢is a precision gas ā¢metering orifice used onā¤ GE gas ranges and ovens to ā¢regulate the volume ofā fuel delivered to the left-front ā£burner. The component is aā£ small, machined ājet that sits between the gasā manifold/valve outlet and the burner assembly; by providing a defined orifice diameter itā establishesā¤ the flow rateā¢ for aā given inletā¢ pressure and is a fundamental part of the appliance’s fuel meteringā system.
Insideā£ the applianceā¤ the ā¤orifice works inā¢ concert with the gas valve, manifold, pressure regulator and burner ports āto establish the correct air-fuel ratio ā¤and flameā characteristics at the left-frontā£ cooking position.It directly ā£affects flame size,stability and ā¢combustion quality and therefore āinteracts with ā¤the ignition system āand primary-air adjustment on ā£theā¤ burner; incorrect orifice āsize,clogging or damage can lead to weak or uneven flame,soot,yellow tipping,orā¤ difficulty maintaining āignition. Because it determines the fuel flowā for a singleā£ burner, proper selection andā¢ installation of the orificeā£ isā important forā£ consistent heating performance and āforā¤ preventing combustion-related problems.
In āthis article readers will findā£ a technical overview of theā¢ WB28K10190 orifice’s function and typicalā£ installationā location, ā¤guidance on compatibility and how to verify correct āpart selection, common failureā¢ symptoms to ālook for, āstepābyāstep troubleshooting and diagnostic checks (visual inspection, cleaning,ā manifold pressure verification and flame observation)andā practical ā¢replacement considerations such as matching orifice diameter/partā£ number, sealingā and leakātest procedures. The contentā£ is aimed at technicians, engineers āand informed appliance owners who need factual,ā£ serviceāoriented details to assess,ā diagnose and replace āthe component safely and correctly.
Table ofā¢ Contents
- Functionā and Role ofā¤ the left ā¤Front Orificeā¢ in Gasā Delivery and Burner Performance
- How the ā¢WB28K10190ā¢ GE Oven Left Front Orificeā Works Inside the Appliance
- Common ā¢Failure Symptoms and Diagnostic āIndicators of a Faulty Left front Orifice
- Compatibility, Replacement Considerationsand Installationā Best Practices forā theā Left Front āOrifice
- Q&A
- In Conclusion
Functionā¢ and Role of the Left Front Orifice in Gas Delivery ā¤and burner Performance
The WB28K10190 GE Oven Left ā¤Front Orifice is a precision-machined gas ā¢jetā¢ that metersā the ā¤volume of āfuel ā¢delivered to ā¤the left-front burner. located between the manifold/valve outlet and the burner head, this component establishes the primary flow characteristicā£ that the valveā£ and burner ports then shape into a usable flame;ā the orificeā£ diameter, expressed in thousandths of an inch (or an equivalent metric āsize), directly correlates to the nominal BTU output at a ā£given manifold pressure. Replacing or installing theā¤ WB28K10190 GEā Oven Left ā¤Front Orificeā with an incorrect size or a partially obstructed unit will change flame geometry, combustion ā¢efficiencyand ā£ignition performance, so matching āthe orifice to the oven’s gas ātype and manifoldā¤ pressure is necessary forā¢ safe, predictable operation.
In āoperation the orifice behaves as a ā£fixed-flow restriction: it does not regulate pressure but sets a repeatable flow ā¤rate for the downstream burner ports and āmixing tube. Technicians evaluateā¢ orifice condition ā¢by observing flame shape (a short, steady blue ācone indicatesā£ correct flowā¢ at ā¢theā£ set manifold pressure) and by checking ā¢manifold āpressure againstā the oven specification; symptomsā such as a lazyā£ or yellow-tippedā flame, inconsistent ignitionor flameā¢ lift can indicate a wrong size or partial blockage. The WB28K10190 is commonly used in specified GE ranges and may be replaced during gas-typeā conversion (natural to LP or vice versa) or after corrosion/clogging; always āverify ā£the appliance model, required orifice codeand any conversion ā£kit documentation beforeā substitutionand āfollow safe isolation procedures while ā£servicing.
- Primary functions: flow metering, establishing BTU ā¢baseline,ā affecting āflame geometry
- Common symptoms of mismatch: weakā¤ flame, yellow tipping, ignition failure, soot
- Compatibility factors: gas type (NG vs LP), manifoldā pressure, thread/type and ā¤OEM part ānumber
| Item | Description |
|---|---|
| Orifice size | Physical diameterā determines volumetric ā£flow and ānominal burner BTU at specified manifold pressure |
| Gas type | Different diameters ā¢used for Natural Gas vs liquid Propane;ā conversion requires matched orifice |
| Role | Serves as the primary metering element upstream of the burner ports for the left-front position |
How the āWB28K10190ā£ GE Oven Left āfront Orifice Works Inside the Appliance
The WB28K10190 GE āOven Left Front Orifice isā£ a precision āgas metering component fitted into the left-front burner assemblyā that constrains volumetric flow to achieve the oven’s designed BTU output forā¢ that position. It mounts betweenā¢ the oven manifold/valve outlet ā£and the burnerā tube, presenting a calibrated orifice through āwhich gas passes ā¢beforeā¤ mixing with primary air; the orifice diameter andā thread form āmust āmatch the valve andā burner tube geometry to maintain correct ā¢pressure drop and flame characteristics. Because it is a ā¤passive flow element, its behaviour is governed by upstream manifold pressure and the static āorifice area – any ā¤deviation from the specified size orā£ contamination (carbon, debris) directly alters mass flow, resulting in low ā£flame, ā¢sootingorā¤ unstable ignition patterns.
Inside the appliance the gas path is: valve ā orifice ā burner tube ā āprimary air mixing ā igniter/combustion. The orifice’s role is primarily hydraulic:ā it creates a predictableā pressure differential that sets the mass flow for the left-front burner;ā¢ changes in inlet pressure, āconversion between natural ā¢gas and propane,ā¢ or altitude require matching orifice specifications rather than adjusting āthe valve. For service, technicians āshould inspect the orifice for blockage, ā¢verify threadā engagement and sealing ā¤with appropriate torque, āand replace with the identicalā£ WB28K10190 or an approved ā¢equivalent to ā£preserve combustion performance. Practical indicators that the āorifice is compromised include uneven heating across the cooktop, yellow-tipped flames,ā£ orā a louder-than-normal hissā¤ atā the burner.
- Keyā features: calibrated diameter,threaded mounting,corrosion-resistant material.
- Common āsymptoms āof malfunction: reduced flame height, sooting, delayed ignition.
- Service ā¤actions: visual inspection, careful cleaningā or replacement, confirm part number and gas type compatibility.
| Item | Description |
|---|---|
| Part number | WB28K10190 – left-front burner āorifice for specified GE oven models |
| Function | Meter gas flowā and establishā correctā¢ pressure dropā toā£ the left-front ā¤burner |
| Installation notes | Match threadā£ and diameter to ā¢valve/manifold; use correct torque and sealant per service manual |
Common Failure Symptoms and Diagnostic Indicators of a Faulty Left ā¢Front Orifice
The WB28K10190 GE Oven Left Front Orifice is the calibrated jet thatā meters āgas flow to ā¤theā¤ left-front burner; its aperture size and spray pattern determine flame ā¤shape,heat output,and low-power simmer capability.When the orifice ā£is partially blocked by carbon,grease,or foreign debris,or when the wrong diameter is installed for the oven’s manifold pressure,commonā¤ symptoms include a āweak orā yellow-tipped flame,flame lift or flicker at highā¢ settings,and reduced ability toā£ hold a stableā low ā¢flame. As orificeā function ā¤interactsā directlyā with ā¢valve outletā characteristics andā£ manifold pressure, an orifice that appears ā¤physicallyā intact can still cause performance problems if it is indeed incorrectly sized for the appliance model or if the threads ā£or seatingā are damaged, affecting āthe alignment andā£ spray pattern āinto the burnerā throat.
Diagnosing a faulty left-front orifice combinesā visual inspection, comparative testsand simple measurements: visually inspect āthe orifice holeā£ for pitting or blockage, compare flame appearance āto adjacent burners, perform āa swap test by installing the suspect orifice onā a different port to see if the symptom follows the partand verify ā¤manifold pressure ā£with aā manometer before concluding the orifice is atā fault. Cleaning with āa non-metallic probe can ā£clear debris ā£in ā¢some ācases, but any deformation, thread ā£damageor discrepancy between measured ā¤and specified aperture requires āreplacement rather than repair.ā The following list summarizesā key symptoms and diagnostic checks commonly used by technicians.
- Persistent yellow or sooty flame on the left-front burner (partial blockage or rich mixture).
- Delayedā¢ ignition ā¢or ā¤continuous sparking despite correct valve operation (restricted gas flow affects ignition timing).
- Significant difference in heatā¢ output between left-frontā and other burners (swap test isolates orifice vs valve/pressure).
- Visible obstruction, āpittingorā¢ thread damage on the orificeā (replace if structural defects are present).
- Normal ā¤flameā after cleaning but recurrence of symptoms (indicates recurring contamination or wrong āorifice sizing).
| Item | Description |
|---|---|
| Recommended diagnosticā action | Visual inspection, swap ātest withā¢ another burner portand manifoldā pressure check;ā£ replace the orifice if aperture, threadsorā sizing do not match service specifications. |
Compatibility, Replacement Considerationsandā¤ installation ā£Best Practices for the Left Front Orifice
The WB28K10190 GE Oven Left Front Orifice isā a small, threaded metering component that controls the volume of āgas delivered to the left front burner. ā¢The orifice diameter andā thread seating determineā¢ steady-state flow rate and flame geometry; mismatched diameter, thread formor seating surface can produce weakā¢ flames, excessive sootingor an unsafe gas leak path. āCompatibility depends on the oven’s manifold and valve family and on the gas type:ā£ natural āgas and propaneā¤ (LP) installations use different bore sizes and sometimes ādifferent thread or seat designs. Technicians should verify appliance model and conversion requirements before selecting a replacement orificeā¢ rather than relying on visual similarity alone, because severalā¢ GE models share external ā£burner hardware while ādiffering in internal metering specifications.
Replacement and installation require controlled, methodical practice to preserve ā£safe operation and accurate combustion. Shut off gasā andā electrical power, keep ā¤passages clean of debrisand replace āthe orifice with the exact OEM part or aā£ manufacturer-specified equivalent; ādo not enlarge or file the bore. After installation, verify āsealing at the thread interface and inspect flame pattern under low and high settings-an acceptable flame is predominantly blue with a defined innerā¢ cone and ā¢no persistentā yellow tipping. If conversionā between gas typesā£ is intended, use theā OEM conversion kit and replace all affected orificesā¢ on the range to maintain ābalanced burner output.
- Verify: confirm āoven model number and declared gas type ābefore ordering a part.
- Install: use manufacturer torque specifications and avoid deforming the seatā¤ or bore.
- Seal & test: avoid introducing sealant into the orifice bore;ā¢ test for leaks and properā flame shape after installation.
- Conversion:ā replace allā related orifices per conversion kit instructions āto retain balanced heat ā£output.
| Item | Description |
|---|---|
| Part | WB28K10190 GE Oven Left Front Orifice – OEM metering component for ā¤specified āGE ā¤models |
| Compatibility | Dependent onā oven model,ā manifold valveā£ familyand gas type; verify model and conversion ā¤requirements |
Q&A
What is the āWB28K10190 GE Oven Left Front Orifice and what does it do?
The WB28K10190 is theā small ā¢brassā¤ gas orifice that meters gas toā the left-front burner (or left-frontā£ oven burner assembly on some models) of certain GE ā¢gas ranges. It screws into ā¢the burner manifold and restrictsā the flow āto produce the correct flame size andā heat for that burner. Proper orifice ā£size and condition are important for safe, āefficient combustion ā£and even cooking.
How do I know ifā¤ my left-front orifice is ā£the WB28K10190 or if it fits my range model?
confirm fitment by checking your range’s parts ā¢diagram or the appliance modelā£ number against OEM parts lists (availableā on GE’s parts website or appliance ā£parts retailers). the part number should match the diagramā for the left-front burner.If you have theā£ old ā£orifice, the replacement should have the same ā¢part number stamped on it or be listed asā a direct replacement in theā¤ parts lookup. Whenā£ in doubt, āuse your āfull appliance model number ā¢to verify compatibility before ordering.
What symptoms āindicate the left-front orifice might potentially be clogged, damagedor wrong size?
Common signs includeā¢ a weak or uneven flame āon theā¤ left-front burner, yellow/orange flame colorā£ (sooting), āsputtering or popping, the āburner ā¢failing to light or going out under load,ā and āuneven heating in that burner area.ā A wrong-size orifice (forā example,ā LP vs NG) will cause ā¤improperā¤ flame size āand combustion problems. If otherā¢ burners are fine while only the left-front behaves poorly, theā orifice is āaā likely suspect.
Can I clean aā clogged āorificeand how should I do ā¢itā safely?
You can often cleanā a clogged orifice, ā¤butā you must not enlarge the orifice ā¤hole. Remove the burnerā parts (grateā andā cap),ā¤ shut off the gas ā¢supplyand remove the orifice using the correctā wrench or socket. Blow out debris with compressed air or use aā¢ thin, non-abrasive tool (like a wooden toothpick) toā gently āclear soft debris. Avoid drilling,reaming,or using ā¤wire that ācan deform theā¤ hole. If theā orifice is corroded, damagedor plugged with āfixedā¤ deposits, replace it.
What are the safe steps and ātoolsā¤ for replacing the āWB28K10190 orifice?
Turn off the gas supply at āthe rangeā and, if present, the house shutoff. ā¤Remove theā burner grate and cap, then use the appropriate-sized āwrench or orifice toolā to unscrew the old orifice from the manifold. Install theā new WB28K10190 by hand-starting the threads to avoid cross-threading, then tighten snugly-do not over-torque.Reassemble the burner,turn ā¢onā gas,and perform a leak check with soapy water at āthe connectionā¤ (bubbles indicate ā¤a leak). Lightā the burner and verify a steady, blueā¢ flame.If you smellā gas or see persistent leaks, shut off gas and contact a qualifiedā¤ technician.
do I āneed a different ā¢orifice when converting between natural gas and LP (propane)?
Yes. natural ā¢gas and LP requireā different orifice sizes because LP isā£ denser and delivered at different pressure; using the wrong orifice causes improper āflame and can be hazardous. ā£Converting a range usually requires a conversion kit that includes the ācorrect orifices ā¤and instructionsand frequently enough āan adjustment or replacement ā¢of the regulator. Follow ā¤the manufacturer’s ā£conversionā instructions exactly or have a qualified technician ā£perform the conversion.
Howā do I test theā burner after installing āa new āWB28K10190 to ensure it’sā working correctly?
After reinstalling and restoring gas, light the left-front ā£burnerā and ā£observe the flame. A correct orifice yields aā steady, mostly blueā flame with minimal yellow tipping. The flame should ignite promptlyā and remain steady across ā¢low-to-high settings without excessive noise or ālifting.If āthe flame is soft, yellow, noisyor does not respond to control changes, recheck the orifice āinstallation, check for obstructionsand verify the correct part and gas type. If problems persist,call a qualified service technician.
Can I replace the orifice myself or should I ā¢hire a technician?
Replacing an orifice is a task many owners canā do if they areā comfortable workingā with gas appliances, ā¢can safelyā shut off the gasand follow leak-testing procedures. āHowever, if you’re unsure, uncomfortableor ā£the job involves converting gas type or replacing other gas-system components, āhire a qualified appliance technician.ā Gas work carries safety risks-improperā¤ installationā can cause ā£leaks, fireor carbon monoxide hazards-so when in ādoubt, call a ā¤professional.
In Conclusion
The WB28K10190 ā£GE Oven Left Front āOrifice is aā small butā critical componentā that regulates āthe flow of gas to theā left front burner, helping to produce the correct flame size and heat output for consistent, efficient cooking. āBecause the orifice determines the amount of fuel delivered āto theā¢ burner, its āproper size,ā¤ condition ā£and installation directly āaffect burner performance, ā¤energy use and safe combustion; a worn, clogged or incorrect orifice can lead to uneven heating, poor cooking āresults,ā£ and combustion issues āsuch as sooting orā£ unstable flames.
Accurate diagnosis and ātimely replacement of the WB28K10190 āGE Oven Left Front Orifice are critically important to restore oven performance and maintain safety. Whenā symptoms such as uneven heating, abnormal flame color, weakā¢ output or persistent performance problems āare āobserved, a qualified technician should inspectā£ theā¢ burnerā¢ assembly, verify ā£theā£ correct orificeā specification and install a compatible replacement if ā£needed. Using the correct āpart and following proper diagnostic ā£procedures ā¤helps ensure reliable operation, efficient fuel use and safe combustion ā¢over the ālife ā¤of the appliance.
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