Dacor Stove Repair in Toronto — Knob not turning or igniting

• On a Dacor sealed-burner cooktop the surface knob is a friction-fit D-shaft cap, so the most common 'knob not working' call is a cracked or stripped-out knob whose D-bore has rounded off and now spins on the valve stem without turning gas. Dacor ships two confirmed OEM caps for this platform: 82977 (superseded to Samsung DE81-08738A, also AP3390330 / PS4271638; fitment confirmed SGM304 / SGM365 / SGM466) and the matte-black DE81-10313A (legacy 82974; D-shaped shaft with spring clip, no logo, fitment confirmed SGM304 / SGM364 / SGM365 / SGM464 / SGM466). The two caps are the same D-shaft knob - 82977 carries the Dacor logo, 82974 / DE81-10313A is the matte-black no-logo version - so we match the exact cap by model/serial and finish rather than fitting a generic round knob that won't seat the D-shaft.
• A knob that turns but produces NO spark and no click on that one position - while the other knobs spark fine - is a contaminated or open burner igniter switch on the valve shaft behind the dial, not a knob fault. The switch is legacy Dacor 103789, superseded to Samsung DE81-07625A (fitment confirmed DCT305 / DCT365 cooktops). A boil-over or cleaning water runs down the stem and opens the switch contact, so the shared module never gets the L-side signal to fire that electrode. We meter the switch for continuity with the knob turned to LIGHT; no continuity in the ON position condemns the switch, not the knob or the order-only module.
• Turning ANY knob produces no spark on any burner (all-or-nothing) - that isolates the one shared multi-point re-ignition module that feeds every electrode, not the individual knobs. Dacor uses the 4-point 86526 (Samsung DE81-03926A) and the 5-point 86527 (DE81-03927A, RI305) by point-count. Because the module is order-only and authorized-distributor-gated, before we condemn it we verify it is actually getting 120VAC (N straight to line neutral, L fed through the surface switches) - a dead-on-every-knob cooktop with no voltage at the module input is a lost-neutral or harness fault, not a module job.
• A knob whose burner clicks on every position but throws NO spark of its own points to a cracked or fouled surface spark electrode on that burner, not the knob. On the SGM cooktop family the single-burner igniter kit is DE81-02696A (legacy 76482-001, also superseding 66915 / 66281 / 1194752; fitment confirmed SGM304 / SGM365 / SGM466) - it packs one electrode, spring, C-clip and heat-shrink per burner. The ceramic insulator develops a hairline crack and the spark jumps to ground inside the body instead of arcing to the cap, so that one knob position stays dark. A single-burner electrode swap restores that position before anyone touches the shared module.
• A knob that turns but the burner WON'T SHUT OFF in the OFF detent - or a stem that won't rotate at all - is a defective surface burner valve, not the knob cap. Per RepairClinic's Dacor burner-won't-turn-off diagnostic, we pull the cap and try the bare stem by hand: if the stem won't rotate or the burner stays lit at OFF, the valve has seized or its detent failed and the valve is replaced (gas-fitter scope), and we never leave a Dacor burner that won't reach a true OFF. This is the one knob-symptom that is a gas-safety call, not a parts-cosmetic one.
• A knob that feels stiff, gritty, or jammed - common after a boil-over or oven self-clean heat soak - is usually grease and carbonized spill baked into the valve stem and the switch area behind the dial, not a failed part. We pull the cap, clean the stem and switch zone, dry thoroughly and re-test before quoting any 82977 / DE81-08738A knob, 103789 / DE81-07625A switch, or a valve - a meaningful share of 'knob won't turn / won't spark' calls clear here with zero parts, which is why we clean and re-test first and condemn hardware second.
• Important platform note for the dual-fuel ER / HDPR / DOP ranges: the OVEN side has NO mechanical knob - the bake/broil/temperature controls are an electronic touch membrane on the ERC, so a 'oven knob not working' on those models is really a stuck touch key (F0 function / touch-key-stuck code) or a failed control, not a knob. Only the gas SURFACE burners carry physical D-shaft knobs (82977 / DE81-08738A, DE81-10313A). We confirm whether the complaint is a surface-burner knob versus an oven touch control before staging any part.

Dacor knob not turning or igniting in Toronto — the local specifics

• The recurring Toronto pattern on Dacor 'stove-knob-not-working' is a split: cosmetic stripped/cracked D-shaft knob caps that spin on the stem, versus the harder call where a spill has tracked down the shaft into the 103789 / DE81-07625A igniter switch or the surface burner valve - so that one knob either won't spark or won't shut the burner off. We diagnose stem-by-hand before condemning, because a stripped cap and a seized valve present identically at the knob.
• We carry the common D-shaft knob caps (82977 / DE81-08738A and DE81-10313A), the 103789 / DE81-07625A burner igniter switch, and the DE81-02696A single-burner spark kit to these calls, plus a meter to prove the switch and electrode before any order-only 86526 / 86527 (DE81-03926A / DE81-03927A) module is named. Surface burner valve replacement is staged by model/serial and done as TSSA gas-fitter work.

For the full Dacor stove module — every fault, part number and code — see Dacor stove repair in Toronto, and for the same fault across all brands the stove knob not turning or igniting guide.