Bosch Wall Oven Repair in Toronto — Broiler not working

• The single most diagnostic Bosch broiler-not-working signature is "bake works, broil is dead" on a GAS oven, and it points straight at the dual gas valve 00415497 (AP2832926). This is the same fail-safe bimetal valve already in our gas no-ignite workup, but the broil context matters: the valve carries TWO independent circuits — one for the bake burner, one for the roof broil burner — so one side can fail with the other still firing perfectly (AppliancePartsPros documents 00415497 as the dual valve that feeds both burners, and that a single circuit can fail in isolation). When the broil igniter glows and draws full current but the roof burner never carries flame, we meter the broil leg of the valve and replace 00415497 ONLY after the broil igniter passes its amp test — an owner shouldn't be sold a dual valve (roughly $150-plus) when a weak broil igniter is the real cost.
• On a gas oven the broil-specific igniter is its own part, NOT the bake igniter 00492431: the roof broil burner is fired by the Bosch broil igniter 00492429 (AP3725649; current PartSelect PS8722791, legacy alias PS3472539; genuine OEM on bosch-home.com, fits Bosch/Thermador/Gaggenau gas ranges). A weak broil igniter is the classic broiler-not-working cause — it can still glow orange yet draw under the ~3.2A the safety valve's bimetal needs to open, so the broil burner never lights even though the bake side is fine. The well-sourced field test is the amp clamp: a healthy igniter pulls 3.2A or more, while a tired one glowing orange may only pull 2.8-2.9A and never opens the valve (Fix.com / AppliancePartsPros / PartSelect broil-igniter and safety-valve guidance). We clamp the broil igniter's amp draw before condemning anything; with the igniter glowing we also read roughly 2-3V AC at the broil terminals of the safety valve — voltage present plus no flame points at the valve, low or no voltage points at the igniter.
• On ELECTRIC Bosch wall ovens the broiler-not-working complaint is most often an open roof broil element while the bake element 00367649/00367648 still heats normally — bake-fine/broil-dead because each is an independent 240V circuit. On HBL5451UC and Benchmark HBLP752UCC columns the genuine broil element is 11021971 (replaces 00791643, PD00049954; RepairClinic/Sears/Parts of Canada), and on range/oven roofs the 3259W element is 00436789 (AP3464683/ForeverPRO, PartSelect PS8714970). We ohm the broil element cold — a healthy recessed broil element reads in the low tens of ohms and glows fully red across its whole length; an OL reading or a section that stays dark with the rest red confirms the element over the board.
• A broil element that meters good on continuity but still won't heat is the tell that the fault is the relay control board's broil channel, not the element — confirmed by the field case where a broil element reads ~23 ohms and good continuity yet produces no heat (DoItYourself / voltnvector). Bosch board 00492069 carries a dedicated broil relay separate from the bake and convection channels; a relay that no longer switches the broil circuit cleanly leaves a perfectly good element cold. We put an AC voltmeter on the broil element terminals with broil called — full 240V present and a dead element is the element; no voltage at the terminals with a good element is the broil relay channel. On these BSH columns 00492069 is diagnosed as a pair with display/control board 00702450/00702451 before either is condemned, so a board that runs into the high hundreds doesn't go on a quote a $30 broil leg explains.
• A drifting or grease-fouled NTC thermistor 00422222 (AP3729929, ~1080 ohms at room temp) reads on a broiler call as a broil that fires briefly then cuts out, or never holds, because broil is the highest-heat mode and the most sensitive to a probe feeding the board a false-high cavity temperature. The board reads the cavity as already at the broil ceiling and stops driving the element. The honest first move (cheaper than any broil part) is to unplug, clean the probe tip and harness connector — broil grease loads the sensor first — and re-meter against ~1080 ohms before condemning anything; a recovered probe restores broil with no part. Error E118/F118 is the NTC read-fault code that surfaces here.
• Error E115/F115 presents on a broiler call as "broil ran a minute then everything quit and the door locked": broil drives the cavity toward its high-temperature ceiling fastest, so a false-high NTC 00422222 reading or a welded broil relay on board 00492069 trips the protective overtemperature shutdown faster under broil than under bake. The control latches the elements off and locks the door (the cooling fan keeps running until the cavity drops below the unlock threshold), which the owner reads as the broiler killing the oven. This is a fire-risk code — we prove sensor resistance versus a stuck broil relay before ever clearing it, never reset-and-return.
• Two free, non-part broiler ruleouts we confirm first: on a gas oven a roof broil burner that's been through a spill or steam needs its ports dried and cleared before the igniter's spark can find gas — a wet broil burner mimics a dead igniter or valve; and on either fuel a loose 240V leg or partly-tripped breaker can leave bake limping on one leg while broil, which demands the full load, simply won't fire. We verify gas actually reaches the broil burner and confirm both 120V legs at the terminal block before quoting any broil igniter, valve, element or relay — and all gas-valve and orifice work on these ranges is TSSA-certified gas-fitter scope in Ontario.

Bosch broiler not working in Toronto — the local specifics

• The recurring Bosch-broiler pattern we see across Toronto is the clean bake-works/broil-dead split, and it sorts cleanly by fuel: on gas columns it's overwhelmingly a weak broil igniter 00492429 that still glows but can't pull the ~3.2A to open the broil side of the dual valve 00415497, with the valve itself the second suspect only after the igniter fails its amp test; on electric wall ovens it's an open roof broil element (11021971 / 00436789) with the bake element untouched, and a smaller tail of genuine broil-relay faults on board 00492069 where the element meters good but gets no voltage. Grease-loaded NTC 00422222 probes that cut broil short and E115 overtemp trips from broil's high heat round out the calls. No counts — this is the qualitative shape of the fault, not a tally.
• We carry to a Toronto Bosch broiler call: the gas broil igniter 00492429 and the dual gas valve 00415497 (gas units), the roof broil elements 11021971 and 00436789 (electric units), the NTC sensor 00422222, plus a clamp meter and AC voltmeter to amp-test the broil igniter and prove broil-terminal voltage before any part comes off the van. The relay/display board pair 00492069 + 00702450 is confirmed by model/serial and ordered only when the broil element meters good but the broil terminals read no voltage.

For the full Bosch wall oven module — every fault, part number and code — see Bosch wall oven repair in Toronto, and for the same fault across all brands the wall oven broiler not working guide.