Whirlpool Wall Oven Repair in Toronto — Gas oven won't ignite (igniter glows weakly)

• The single most common Whirlpool gas-wont-ignite call is a weak hot-surface (glow-bar) igniter that still glows. The oven igniter W10918546 (PS11770066, supersedes 98005652) ages high-resistance so it glows orange for more than 90 seconds but no longer draws the current it must pull through the safety valve to open it. This part is rated 3.4-3.6A; in the field we treat a sub-3.2A draw as a failing igniter. The trap is that a resistance/ohm test CANNOT catch this fault — an igniter reading inside the normal flat-igniter band (~40-400 ohms) can still be too weak to open the valve. We clamp the amp draw in the igniter leg during a bake call: an orange (not white-hot) glow with a sub-3.2A draw confirms the igniter, and an open (OL) igniter that won't glow at all is the simpler confirm-and-swap.
• Whirlpool gas cavities use two physically different igniter shapes, and ordering the wrong one strands the second truck roll: the flat Norton-style igniter kit 12400035 (PS1573892, rated 3.2-3.6A, paired with NC4100-series valves) is the newer common style and explicitly does NOT replace the round Carborundum-style igniter found in older ranges. We identify the cavity's igniter shape and valve family before ordering — the flat kit's own listing warns it won't substitute for round or blue-ceramic igniters, so a model/serial match comes before the part order.
• When the igniter glows fully white-hot and draws good current but the oven still won't light, the fault shifts off the igniter to the oven gas safety valve. The igniter and valve are wired in series — the igniter's current draw is what opens the valve — so a valve with an open or out-of-spec coil never opens even behind a strong igniter. The field check is continuity and resistance: each valve coil leg should read roughly 210 ohms, and the control must see continuity in BOTH the bake and broil coil or it won't energize the circuit at all. A white-hot igniter (>3.2A draw) with no gas is the valve; an orange igniter is still the igniter.
• An igniter that glows correctly but sits in the wrong position relative to the burner is a real no-light cause that looks like a failed part. After a DIY or prior-tech igniter swap, the new glow-bar can be mounted so the flame path doesn't cross it — gas reaches the burner but never contacts the hot surface, so it glows full-bright, the valve opens, yet ignition is delayed or absent (and raw gas can pool). We verify the igniter sits where gas contacts it immediately before condemning anything; a mispositioned W10918546 mimics a valve fault while both parts are good.
• A gas RANGE whose surface burners click but won't light is a separate ignition path from the oven bake igniter and gets diagnosed separately on a 'won't ignite' call. The surface-burner spark electrode WP8523793 (PS11746068, AP6012852, supersedes 74007473 / 7432M126-60 / 8273061 / 939943) produces the cooktop spark; a cracked ceramic, fouled electrode tip, or moisture under a spilled-on cap throws the spark to ground so it clicks without lighting. We clean and gap the electrode and check the spark wire before condemning the spark module — a single burner that won't spark is usually the electrode or a soaked switch, all burners sparking-or-dead points upstream.
• On a no-ignition call where the igniter never glows at all, we confirm the cavity isn't being held off by a control fault before blaming the igniter. Whirlpool gas ovens run the same F#E# dialect as the range line: an F2E1 (stuck/shorted keypad key) can lock the panel so Bake never engages and no ignition sequence starts, reading to the owner as 'won't ignite' with a perfectly good igniter and valve. A one-minute power-down clears a false F2E1 trip; a persistent code is a keypad/control fault kept separate from the gas-train parts above.
• After a household power blip, a gas oven that 'won't ignite' is often just the PF power-failure flag holding the control — not a gas fault at all. The PF flag means only that line power was interrupted; it clears on reset and the oven re-arms its ignition sequence. We rule out PF and a tripped breaker on the oven circuit first, because re-igniting a strong igniter behind a control that's simply flagged PF wastes a parts order on a train that was never broken.

Whirlpool gas oven won't ignite (igniter glows weakly) in Toronto — the local specifics

• The recurring Toronto pattern on Whirlpool gas-wont-ignite is the orange-glow-but-no-flame igniter: the customer reports the oven 'tries to light, glows, then nothing,' which is the textbook weak hot-surface igniter that still passes a resistance test but can't draw enough current to open the valve. The second recurring pattern is the post-DIY call — a homeowner or prior tech already swapped the igniter but mounted it out of the flame path or fitted the wrong shape, so it glows full-bright and still won't light.
• We roll these calls carrying both Whirlpool igniter shapes (flat W10918546 / 12400035 Norton kit and a round Carborundum-style spare), the WP8523793 surface spark electrode for range cooktops, and an amp clamp to prove the igniter draw before any part comes off the van. Oven gas safety valves are model/serial-matched and brought next-day when the amp test clears the igniter.

For the full Whirlpool wall oven module — every fault, part number and code — see Whirlpool wall oven repair in Toronto, and for the same fault across all brands the wall oven gas oven won't ignite (igniter glows weakly) guide.