Most modern gas ovens use either a hot-surface "glow-bar" (bake) igniter or an electronic spark ignition; the glow-bar both provides the heat to light the gas and acts as the current-draw/sensing element in series with the oven safety gas valve so the valve opens only when the igniter draws sufficient current or becomes hot enough.[2][3][4]
Typical symptoms of igniter problems include an igniter that glows but the burner never lights (delayed ignition), much slower preheating, failure to reach set temperature, or the smell of gas during preheat; delayed ignition carries a burn and fire risk, and the CPSC recommends stopping use and following manufacturer or recall guidance if delayed ignitions occur.[2][4][1]
Safety-first checks before any inspection or testing
Disconnect electrical power. The igniter circuit is fed by 120 VAC; disconnect the oven from power (unplug or switch off the dedicated breaker) before doing any testing that exposes wiring or the igniter assembly to avoid electrical shock.[5][4]
Don’t touch or attempt gas-line or valve repairs unless qualified. NFPA 54 / IFGC and manufacturers require qualified personnel for fuel-gas appliance or valve work; do not loosen gas fittings or attempt gas-valve service yourself.[6][7][5]
If you smell gas or observe delayed ignitions: stop using the appliance and contact a qualified technician and follow manufacturer/CPSC guidance; delayed ignition behavior is a documented consumer hazard.[1][4]
Simple, non‑intrusive homeowner checks
Before opening panels, do these observation checks while the oven is powered and set to Bake:
Set the oven to a Bake temperature and watch: a functioning glow-bar igniter should begin to glow within seconds and a flame should appear within about 1–2 minutes on many models; if the igniter glows but no flame appears after an extended period, stop use and call a professional.[2][4][1]
Note preheat time and top temperature: much slower preheat or failure to reach the set temperature are classic signs of an igniter problem.[2][3]
If you smell gas during attempted ignition, power off the oven and contact a qualified technician immediately; do not attempt further cycling of the range.[1]
Meter tests you can do (safely)
1) Resistance / continuity test (out of circuit)
With the appliance power disconnected and the igniter unplugged from the harness, measure resistance across the igniter element with an ohmmeter. An open circuit (no reading) indicates a burned-out element and is a clear replacement indication.[5][2]
Many parts guides and manufacturer service notes show a typical new glow-bar resistance around ~75 ohms for many models, but exact "good" resistance varies by model and part; for accuracy, compare to the part specification or a new-part measurement for your exact oven model.[2][5]
2) In‑circuit current draw test (more definitive)
With power restored and the oven calling for heat, use a clamp ammeter on the igniter lead to measure operating current. The oven safety valve is designed to open only when the igniter draws enough current; if the measured amperage is below the valve's opening threshold the valve will not open even if the igniter glows.[3][4]
Reported valve‑opening current expectations vary by manufacturer and model; many repair guides list typical values in the roughly 2.5–3.6 amp range and flag readings under about 2.6–2.7 A as weak for many ovens. Because these numbers are model‑dependent, use the valve or part specification where possible to judge a reading.[3][4]
How to interpret combined tests (practical decisions)
If out‑of‑circuit resistance is open (infinite), the igniter is burned out — replace it.[2][5]
If resistance looks plausible but in‑circuit amperage is below the valve's required operating current, the igniter is weak and should be replaced even if it glows.[3][4]
If the igniter draws sufficient current yet no flame appears, suspect the safety valve, gas pressure, or supply — stop and call a qualified technician for gas‑system diagnosis and valve work.[2][3]
Keep in mind published resistance and amperage diagnostic numbers differ by source and model; treat the ~75 Ω and ~2.5–3.6 A figures as common examples and confirm exact values for your appliance model where possible.[2][3][4]
Safe DIY replacement workflow (high-level)
Follow your model's service manual for details; the generalized safe sequence is:
Do not loosen or modify gas‑line fittings or safety valves unless you are qualified — defer any gas work to a licensed technician.[6][7][5]
Remove oven racks and any access panels needed to reach the igniter per the manual.[4]
Disconnect the igniter's electrical quick‑disconnect and remove the mounting screws; swap in an OEM‑correct replacement igniter and reassemble.[2][4]
Restore power and test; if ignition issues persist after a correct replacement, stop and call a qualified technician to check the safety valve and gas supply.[4][3]
How much will parts and service cost?
Replacement bake/glow-bar igniters (OEM or aftermarket) commonly cost roughly $20–$100 depending on style and brand; exact part selection must match your model.[2][8]
Typical professional replacement (parts plus labor) is commonly reported in the roughly $150–$300 range for many homeowners, though high‑end models or emergency callouts may be higher and local quotes vary by market and provider.[8][4]
When to call a qualified service technician
If you smell gas, observe delayed ignitions, or see repeated failure-to-light events — stop using the appliance and contact a professional; delayed ignitions are a documented hazard.[1][4]
If in‑circuit current is sufficient but there's still no flame — the safety valve or gas pressure likely needs professional diagnosis.[3][2]
Any time gas-line fittings, pressure checks, or valve work are required, engage a qualified technician per NFPA/IFGC and manufacturer instructions.[6][7][5]
Bottom line — safe, systematic troubleshooting
Observe first (glow and timing), then do safe out‑of‑circuit resistance checks, and—if you can—use an in‑circuit clamp ammeter for the most reliable diagnosis. Replace weak or open igniters with the correct OEM part; defer any gas‑valve, pressure, or supply work to qualified technicians. If you see delayed ignition or smell gas, stop using the oven and follow CPSC and manufacturer guidance to get the appliance serviced.[2][3][4][1]
Abodivo Tool
Do these signs mean your oven igniter needs attention?
Quick check
Quick reference checklist to decide whether to proceed to diagnostics, replace the igniter, or call a technician.
If none of these checklist items apply, observe glow and timing and follow the article's safe troubleshooting steps or consult the service manual.
Defer any gas-line, pressure, or valve work to a qualified technician and follow manufacturer/CPSC guidance.