JennAir Stove Repair in Toronto — Gas burner clicks constantly

• Shorted spark-ignition switch under a knob (whole top clicks even with every knob OFF): on JennAir gas tops each burner has its own spark switch that closes to fire the module - the verified Jenn-Air/Whirlpool OEM switch is WP74007774, supplied on many models as the switch-and-harness assembly 12002792 / 12002790. When a boil-over or spray cleaner seeps down the knob shaft the switch shorts closed and feeds continuous voltage to the spark module, so the cooktop clicks nonstop no matter where the dials sit. We dry the unit first (24h unplugged, or cool air from a blow dryer onto the knob shaft with knobs off), then bench-test each WP74007774 switch for a short to ground - only a genuinely welded-closed switch gets replaced, never the module.
• Cracked or fouled surface spark electrode leaking the arc to ground (one burner clicks constantly): the verified Jenn-Air-compatible electrode is WP74009336 (AP6011124 / PS11744318), mounted under the burner. A hairline crack in its ceramic insulator lets the spark bleed to ground instead of jumping the gap, so that burner clicks continuously and weakly while the others behave. We inspect the ceramic for cracks and watch the spark in a darkened kitchen; WP74009336 vs the KitchenAid-sibling electrode WP8523793 (AP6012852 / 74007473) is model-coded, so we confirm the right one by model/serial before swapping - both are valid Whirlpool/Jenn-Air surface electrodes.
• Burner lit but still clicking - flame-rectification ground path lost (the misdiagnosed one): JennAir surface burners sense light-off by flame rectification - moisture in the flame between the electrode and the burner base completes a path to ground that tells the spark module to stop. If the orifice holder/burner base is misaligned, corroded, or not grounding, the module never gets that signal and keeps re-sparking even though there is a good flame. Per JennAir's own guidance we clean the electrode tip, reseat/reground the orifice holder and burner base, and replace the holder if it is bent or no longer grounding - this is the classic 'flame is on but it won't stop clicking' fault that gets the WPW10475147 module needlessly condemned.
• Burner cap seated off-centre keeping the flame off the spark tip (clicks-constantly, weak or no light): JennAir Product Help lists a cap not seated flush as a primary cause of constant sparking - a cap sitting proud or rotated moves the ports and flame away from the electrode gap, so the burner either won't catch or, once lit, the flame never reaches the spark tip to satisfy the rectification circuit and it keeps clicking. We reseat the cap to its locating tabs and confirm it doesn't wobble before touching any ignition hardware - a no-parts fix that resolves a large share of these calls.
• Downdraft blower dispersing the flame off the igniter (the JennAir-signature constant-click): on the proprietary JGD/JX3 gas downdraft cooktops and JES/JDS downdraft slide-ins, the integral vent blower can blow the flame away from the spark electrode so the module reads the burner as un-lit and re-sparks continuously. JennAir's published fix is to lower the downdraft vent blower speed or raise that burner's flame setting - this is unique to the downdraft line and is a setup/condition fix, not a parts swap, so we check it before quoting any igniter or module on a downdraft unit.
• Re-ignition spark module (WPW10475147) - condemned last, not first: the 4-point re-ignition module under the cooktop powers and monitors every electrode. A truly failed module sparks multiple burners at once or clicks with everything off and bone-dry. Per JennAir/RepairClinic procedure WPW10475147 is only condemned after the electrodes (WP74009336 / WP8523793), the spark switches (WP74007774), the orifice-holder ground and the caps all check out - most 'dead module' constant-click calls on this platform are moisture in the switches, a cracked electrode, or a lost flame-sense ground, so replacing the module first is the misdiagnosis we avoid.
• Reversed line/neutral polarity at the receptacle (post-install or post-move constant click): documented on Jenn-Air gas tops (e.g. CCG-series) - if hot and neutral are swapped at the outlet, the spark module sees the wrong reference and the burners spark continuously even when lit. On any unit that started clicking right after an install, move, or receptacle change we confirm hot and neutral are not reversed at the receptacle with a 3-light polarity tester before condemning a single ignition part (on a correctly wired polarized outlet the narrow/smaller slot is hot, the wider slot is neutral, and the round pin is ground; on the appliance cord the ribbed/ridged conductor is the NEUTRAL wire and the smooth conductor is hot).

JennAir gas burner clicks constantly in Toronto — the local specifics

• The recurring JennAir constant-click pattern we see across Toronto is moisture-driven: a recent cooktop cleaning, a boil-over, or condo-kitchen humidity gets into the WP74007774 spark switches under the knobs and the whole top clicks with every knob off - so we dry and bench-test the switches before quoting hardware. The second recurring pattern is the burner that is clearly lit but still clicks, which on this platform is a lost flame-rectification ground at a misaligned orifice holder or a cracked WP74009336 electrode, not a dead WPW10475147 module - naming that correctly is what keeps a constant-click call from becoming an unnecessary module replacement. On the downdraft JES/JGD line we also check blower speed vs flame setting before any parts.
• We bring the WP74009336 surface electrode, the WP74007774 spark-ignition switch (and the 12002792 switch-and-harness assembly when the harness is suspect), and the WPW10475147 re-ignition spark module, plus a polarity tester and a blow dryer to dry switches on site - the verified KitchenAid-sibling electrode WP8523793 is confirmed by model/serial if that turns out to be the fit. Downdraft/cartridge trim is confirmed by model before ordering.

For the full JennAir stove module — every fault, part number and code — see JennAir stove repair in Toronto, and for the same fault across all brands the stove gas burner clicks constantly guide.