Viking Stove Repair in Toronto — Gas burner clicks but won't light

• Spark-module failure is the classic Viking 'clicks but won't light' (or won't click at all) on the cooktop, and the right module depends on whether the range is open-burner or sealed-burner. Open-burner ranges run the Iris spark module PA020058 - the Iris system uses one single-burner module per burner on a shared power/neutral/ground harness, so a single failed PA020058 typically kills spark at just that one burner. Sealed-burner ranges run the Invensys 0+4 re-ignition module PA020047 (AP5315193) or the Tytronics 0+4 PA020041 - these single modules drive up to four burners at once, so a bad sealed-burner module commonly kills spark across several burners or the whole top. These are not freely interchangeable - PA020047 is a functional replacement for the older PA020013 but is NOT electrically identical (different ignition-switch harness logic for sealed burners), so we match the module to the model's harness rather than to the terminal count. Whether the dead-spark pattern is one burner (Iris module or a single dead electrode) or several burners at once (sealed 0+4 module), only metering tells a failed module apart from a failed electrode.
• A single burner that won't light while the others spark normally points at the surface-burner igniter electrode (or, on an Iris open-burner top, that burner's own module), not a shared module. Viking's open-burner electrode is PA020028 (replaces AP5315182, 910113, G5007447 and the older PA020014); it carries the spark gap at the burner head. We check the electrode tip, the porcelain insulator for hairline cracks, and the lead routing - a cracked insulator or a lead arcing to the chassis bleeds spark to ground and you get clicking everywhere but no flame at the one burner. We replace the PA020028 rather than re-gap a cracked one, because a fractured insulator re-fails fast.
• Moisture in the spark switch is the most under-diagnosed Viking no-light call and the one we always rule out before condemning a module. After a boil-over or an aggressive cleaning, water wicks into the knob-actuated spark switch and the burner head, and the spark either shorts (constant clicking with knobs off) or dies entirely. Viking's own guidance is to dry the igniter area and let it air-dry; we pull the caps, blot the electrode and switch, and dry the switch contacts before we touch a part - a large share of 'sudden won't light' calls clear here with zero parts.
• Clogged burner ports and a mis-seated cap mimic an ignition fault: the electrode sparks fine but gas can't reach the spark gap. Grease and food crust over the ports, or the burner cap is reseated off-register after cleaning, so the burner clicks and clicks without catching. We clear the ports, confirm the cap sits flush and aligned, and verify the spark is actually jumping to the burner head before we order any PA020028 electrode or PA020-series module - a blocked port is a clean, not a part.
• On the oven side, a 'burner won't light' complaint is a different part entirely: the flat hot-surface oven igniter PB040001 (065650-000, replaces 792263 / AP5315579) on the bake or broil burner. A glow-bar igniter weakens with age and draws too little current to pull the safety gas valve open - it may glow dimly but never reach the temperature that opens the valve, so the oven clicks/glows but never lights. We meter the igniter's draw in series with the valve; a weak glow that won't open the valve means the PB040001 gets replaced, since glow-bar igniters fail by drifting out of spec, not by going fully dark.
• The 2015 CPSC recall - about 52,000 Viking gas ranges sold in the U.S. (plus roughly 8,300 distributed to Canada) that could turn a burner on by themselves, the defect that later drew the $4.65M civil penalty for failure to timely report - makes any Viking ignition call a serial-check job first. A burner that self-ignites or behaves erratically on the affected models is a safety condition, not a routine no-light, and we verify the serial against the recall window before doing spark-side work. We do the same for the 2022 5-Series VGR/VGIC gas-tubing recall (units built Aug 10-Dec 1, 2021) on any burner-feed complaint, since a gas-joint issue presents near the burner.
• Diagnosis on these is by measurement, not by fault code - Viking's mechanical-control gas ranges have no error-code display for a no-light burner. We meter the spark switch for continuity on knob-turn, confirm the module is outputting spark to each lead, and check the electrode gap and ground path. That measurement discipline is what stops a parts-cannon swap: the same 'won't light' symptom can be a wet switch (dry it), a clogged port (clean it), a cracked PA020028 electrode, or a dead PA020058/PA020047 module, and only metering tells them apart.

Viking gas burner clicks but won't light in Toronto — the local specifics

• The recurring Toronto pattern on Viking 'burner won't light' is that the call splits cleanly between a quick no-part fix and a module/electrode swap, and the split favours moisture and ports more than owners expect. After a boil-over or a holiday deep-clean, the knob-actuated spark switch wicks water and the top either clicks with the knobs off or goes dead - dried and cleaned, it lights. The genuine parts calls cluster on aging open-burner ranges where a cracked PA020028 electrode insulator arcs to ground, or a tired PA020058/PA020047 module quits spark (one burner on an Iris open-burner top, several at once on a sealed 0+4 module). We always serial-check the 2015 self-ignition and 2022 gas-tubing recall windows before spark-side work.
• We roll to these calls with the open-burner electrode PA020028, the open-burner Iris module PA020058, and the sealed-burner modules PA020047 (AP5315193) / PA020041 staged by serial-match, plus the flat oven igniter PB040001 / 065650-000 for oven-side no-light. We also carry the no-part essentials - port-cleaning tools and the means to dry a moisture-shorted spark switch - so a wet-switch or clogged-port Viking gets fixed on the first visit without an ignition-part wait.

For the full Viking stove module — every fault, part number and code — see Viking stove repair in Toronto, and for the same fault across all brands the stove gas burner clicks but won't light guide.