Frigidaire Stove Repair in Toronto — Knob not turning or igniting

• Split the fault first, exactly like the rest of this Frigidaire/Electrolux range platform: a 'knob not working' call is NOT an EOC board fault. The F-codes this platform throws (F10 runaway-temp, F30 RTD open, F31 RTD short, F90-family door-lock) are oven-control faults and never appear for a dead, spinning, or stripped knob - so a knob complaint is a mechanical/switch isolation job (the knob itself -> its D-shaft/bushing -> the switch or valve behind it), worked in that order, and we never quote the 316418/316557-family EOC for it.
• Knob spins freely / nothing happens when turned (the #1 'knob not working' cause) = the plastic knob's D-socket is stripped or cracked so it no longer grabs the flatted shaft. The verified OEM burner knobs are model-coded: 316220009 (black, PS1991531/AP4322122; replaces 1379610) and its white sibling 316220008, the silver metal-insert 5304502763 (PS11724147/AP5984069; replaces 4279473) for FGGF/DGGF Gallery gas ranges, the newer black 5304507386, and 5304525746 (replaces 5304504839) on FFGC3026/FFGC3626 gas cooktops. The D-shaft has its flat at 6 o'clock with OFF at 12; a rounded-out socket is a sub-$15-$45 snap-on knob swap that never touches the switch or valve behind it - we confirm by feeling whether the bare shaft still indexes the burner before condemning anything deeper.
• Knob feels loose, jiggly, or wobbles on the shaft (turns the burner but rattles) = a worn knob bushing, not necessarily the knob. Per PartSelect's Frigidaire range-knob guidance the fix is the knob bushing PS8769455 (a black sleeve sold separately) first; if that doesn't tighten it, the model-coded burner knob itself (e.g. 316220009 / PS1991531) is replaced. We seat the bushing and re-check side-to-side play before quoting a knob, because a $10 bushing routinely cures a 'loose knob' that looks like a worn knob.
• GAS range, knob turns smoothly but the burner won't change from low to high (or won't shut down) = the surface burner valve stem behind the knob is damaged, not the knob. RepairClinic/AppliancePartsPros are explicit: if the flame doesn't track the knob and the valve stem feels loose or wiggles, the surface burner valve is replaced - the verified OEM valves are 5303935308 (genuine Frigidaire surface burner valve) and the position-specific right-front valve 5304506550 (white stem, 1500 BTU), color-coded on the stem by BTU. This is gas work that under Ontario rules must be done by a TSSA-certified fitter, and we meter/feel the stem before ordering rather than blaming the knob.
• GAS range, knob and shaft are fine but that one burner won't spark when turned to LITE = the spark ignition switch behind the knob has failed open, not the knob. The verified part is genuine Frigidaire 318163400, supplied on harness-fed models as the Spark Ignition Switches WITH wire harness 316580615 (PS3409151; replaces AP4566012 / 316219025), with the Frigidaire-badged 316032002 / 316032000 sibling. The switch only closes at the LITE position to feed the spark module; a switch whose contacts failed open feeds nothing so that position is dead even though the knob turns normally - per PartSelect we meter it for continuity at LITE (and check it isn't shorted/continuous at OFF) before quoting the switch-and-harness assembly.
• ELECTRIC (smoothtop/coil) range, knob turns but the element stays cold at every setting = the surface element control (infinite) switch behind the knob, not the knob. The verified large-element switch is Frigidaire 318293821 (the 8-inch/large-element variant, superseded by 318293827; PS2342883); coil-range siblings are the large-element 316436001 (8", AP3885460/PS1145040) and small-element 316436000 (6", PS1145039). With 240V proven at the switch's L1/L2 we turn the knob to HIGH and meter H1-H2 - no output means the switch is condemned, never the radiant element until the switch tests good. A failed infinite switch can also leave a burner stuck full-on regardless of knob position, the mirror symptom of the same part.
• Confirm the burner zone before ordering, because the surface knob, its knob shaft, and the oven knob are different parts on the same range. The white 316442500 (PS1528151/AP3960207; replaces 1197115) is a SURFACE-BURNER control knob on FFEF/FGEF builder-grade ranges, and 316354300 is a genuine Frigidaire range knob shaft / heat shield that can be the worn piece behind a knob that no longer indexes. A heat-warped knob whose socket has shrunk reads as 'knob not working' even though the switch or valve behind it is healthy, so we verify the bare shaft indexes before condemning anything deeper.

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

• The recurring Frigidaire-in-Toronto pattern for this fault is the stripped or rounded-out D-socket knob: the silver metal-insert FGGF/DGGF Gallery knob (5304502763) and the older black/white builder-grade burner knobs (316220009 black, 316220008 white, 316442500 white) wear at the socket and spin without turning the shaft, and a close second is a moisture-shorted or open spark ignition switch (318163400) behind a knob that turns fine - both far more common than the valve or infinite-switch behind them. Loose-and-jiggly knobs that turn out to be a worn bushing (PS8769455) rather than a bad knob are a steady repeat. Qualitative pattern from GTA service - no job counts implied.
• We carry the Frigidaire burner-knob family (316220009 black, 316220008 white, silver 5304502763, black 5304507386, cooktop 5304525746) and the white surface-burner knob (316442500) in the common finishes, the knob bushing (PS8769455) and range knob shaft (316354300), plus the spark ignition switch (318163400 / switch-and-harness 316580615) and the large-element surface-element infinite switch (318293821) so most knob calls close on the first visit; surface burner valves (5303935308 / 5304506550) and position-specific right-front valves we order to model/serial and bring on a booked TSSA-certified gas return.

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