Thermador Wall Oven Repair in Toronto — Broiler not working

• The defining electric broiler-not-working fault on a Thermador (BSH) wall oven is an open-circuit upper broil element while bake still heats normally. Because the bake and broil units run on independent relay channels of the relay control board, a dead broil mode with a working bake oven isolates to that one element, not the control. The broil element is 00143944 (a top-mounted 8-pass element, 3600W @ 240V; cross-references AP3777846 / PS8695457 / legacy 143944). We pull and meter it at its spade terminals: for a 3600W/240V element a healthy reading is roughly 15-17 ohms cold (R = V^2/P = 240^2/3600 ~ 16 ohms nominal), and an open / 'OL' reading or a visible blister or break at the loop condemns it. We run broil and bake separately first - broil dead with bake fine = the broil element; BOTH modes dead moves the fault upstream to the relay board or power feed.
• On the BSH/Thermador platform the broil heat path is switched by a dedicated relay on relay control board 00492069. A failed-open broil relay won't close to feed the 00143944 broil element, so a known-good element still won't glow and a meter shows no AC voltage at the element legs during a broil call - even though bake (a separate relay channel) works fine. This board carries the documented BSH fault set 'oven does not reach temperature' and 'exceeds the set point or will not turn off,' and throws intermittent F1/F2/F3/F4 codes (F1 = oven control / relay-board failure, F2 = oven too hot, F3 = open RTD sensor, F4 = shorted RTD sensor). We confirm 240V is reaching the element block and that the element tests good before condemning the board - never the reverse.
• Relay control board 00492069 is discontinued as a new part on most Thermador wall ovens, so a proven broil-relay failure is a rebuild/board-repair job rather than an off-the-shelf swap. On these models the relay board pairs with main/display control board 00702450 or 00702451, and BSH service practice is to address both together because a degraded relay board and a flaky display board produce overlapping no-broil and won't-reach-temp symptoms - the relay-board repair kits are explicitly documented to cure F-codes and broiler failures. We isolate the broil relay specifically with an AC-voltmeter check at the element terminals during a broil cycle before sending the board for rebuild.
• On a GAS Thermador (Pro Harmony / Pro Grand) the broiler-not-working signature is the broil-burner ignition no longer firing, not an electric element. Depending on the model the broil burner is lit either by a spark-ignition electrode that arcs from its tip to a shield to light the gas, or by a hot-surface (glow-bar) igniter; a cracked porcelain insulator, a damaged spark tip, or a failed glow-bar kills ignition so the broiler clicks or warms but never lights. We visually inspect the ignition component, confirm the spark gap or that a glow-bar reaches temperature, and verify the exact broil-igniter part number against the unit's model/serial parts diagram before naming any part - bake and broil run independent ignition circuits, so broil-dead-bake-fine isolates to the broil igniter, not the control.
• When a gas Thermador broil burner ignites normally (spark or glow-bar present) but still won't light, the fault moves to the broil safety valve, which is far less common than the igniter. The safety valve works with the ignition to admit gas to the broil burner; if its coil or bimetal fails the burner gets ignition but no fuel. Per RepairClinic / AppliancePartsPros guidance the safety valve is the LAST part to suspect - we confirm the broil igniter is firing cleanly first, then check the valve coil for continuity and listen for gas, so we never parts-cannon a valve before clearing the cheaper, far-more-likely ignition component.
• An intermittent or no-broil complaint paired with a temperature code points at the NTC oven probe, not the broil hardware. On the BSH/Thermador platform errors E101-E104 (upper oven) and E201-E204 (lower oven) are genuine temperature-sensor (NTC) faults - check the harness first, then the probe resistance. The listed probe 00414152 reads about 1080-1100 ohms at room temperature (verify per Bosch/Thermador spec for the model); an open (OL) or off-baseline reading feeds the board bad data so it won't drive the broil relay correctly. The honest first step is to unplug, clean the probe and connector, and re-meter before ordering the sensor - a cleaned probe sometimes recovers. (Note: E305 is predominantly a control-board/baseplate communication fault, or a door-lock fault on self-clean models, with temperature-sensor only a secondary possibility; and E011 is a stuck-key / control-panel fault, not an NTC sensor code - neither belongs in the temperature-sensor family.)
• A broil element that worked, then quit, with a charred or discolored spade terminal is a receptacle-and-wire failure, not just a dead element. The broil unit is the highest-current connection in the cavity (3600W), so heat-cycling loosens the push-on spade, resistance rises, and the connector burns. We inspect BOTH broil terminals for char before condemning element 00143944 - when one is burnt we replace the element AND repair the receptacle/wire with a high-temp ceramic receptacle kit, because a new element pushed onto a charred receptacle just re-burns.

Thermador broiler not working in Toronto — the local specifics

• The recurring Toronto pattern on Thermador broiler-not-working calls is broil-dead-while-bake-works on built-in electric wall ovens: an open upper broil element 00143944, or - more often than owners expect on these premium boxes - a failed-open broil relay on the discontinued 00492069 control board, which presents identically until we meter voltage at the element legs during a broil cycle. On gas Pro models the recurring tell is a clicking-or-warming-but-no-light broiler from a failed broil igniter (spark electrode or glow-bar, confirmed by model/serial). We isolate element vs. relay vs. igniter on the meter before quoting, because the board is the expensive path and we don't condemn it until the element and feed are cleared.
• We roll to Toronto Thermador broiler calls carrying the top-mounted broil element 00143944 (3600W/240V) and a high-temp ceramic receptacle/wire kit for charred broil terminals, plus a BSH-spec NTC oven probe (OEM 00414152, now discontinued-new) for sensor-driven no-broil codes (E101-E104 / E201-E204). For gas Pro models we identify the correct broil igniter (spark electrode or glow-bar) by model/serial and order it in. Relay/display control boards 00492069 and 00702450/00702451 are confirmed on-meter first, then staged as model-coded rebuilds rather than carried blind.

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