GE Stove Repair in Toronto — Surface element stuck on high

• A surface coil or radiant zone that stays on full power with the knob turned to LOW or OFF is the infinite (surface element control) switch failed closed - its internal contacts welded so the 240V to the element is never interrupted. This is the #1 element-stuck-on-high cause on GE/Hotpoint electric tops and it throws NO display code, because GE's F-codes are oven-electronics only and a cooktop switch fault is silent. GE's 8-inch / 2,500W infinite switch is WB24T10025 (genuine OEM, AP2024072 / PS236750; replaces 769692), the parts literature listing 'burner stuck on high' as its signature failure; the newer surface-element control switch on the JB6/JB7/JB8/JBS/JS6/JS7 platform is WB24X25013 (AP5999509 / PS11729102; replaces 4464832 / 191D4774P005). We pull the knob and meter the switch for continuity at OFF - a switch that still reads closed with the dial off is the welded part, condemned on the spot.
• A glass-top (radiant) GE zone stuck hot needs the radiant element itself checked for a short to its sheath/chassis before the switch is condemned - a coil that has arced internally to ground feeds one leg of 240V around the open infinite switch, so the zone sits on no matter where the dial is set. GE owners and RepairClinic both report shorted radiant elements and shorted terminal blocks producing exactly this. On the dual-zone tops the element is the WB30T-family radiant (e.g. WB30T10130 12-inch dual / WB30T10099 9-inch dual / WB30T10047 6-inch single); we meter the radiant for a short to chassis (not just for open continuity), since a grounded element and a welded switch produce the identical stuck-on-high symptom but are different parts and different fixes.
• On a coil-top GE range, a burner stuck hot traces to a burnt, pitted, or welded surface-element receptacle - WB17X5113 (AP2021559 / PS232646, the receptacle-and-wire kit) - paired with the WB30X253 8-inch coil. Arcing at the terminal block chars the receptacle contacts so they bridge and feed the coil continuously around the switch. Per RepairClinic the receptacle is replaced when its contacts look burnt; we swap the coil into a known-good receptacle to isolate, and if the prongs are pitted we replace BOTH the WB30X253 coil and the WB17X5113 receptacle so the new contact doesn't re-burn and re-stick.
• On the OVEN side, element-stuck-on-high shows as the cavity running away past setpoint and GE posts it as F2 (oven over-temperature / runaway - sensed above ~650F in cook mode or ~915F in self-clean). The most common true cause is a relay welded closed on the WB27T-prefix oven relay control board (e.g. WB27T10821) feeding the bake or broil element continuously - the element glows and the oven climbs past setpoint even when commanded off, the classic 'broil element stays on and won't shut off' presentation. The relay is part of the board and not separately serviced. We meter the relay load contacts with the oven OFF: continuity at rest condemns the model/serial-coded WB27T board, which we confirm by model rather than quoting a generic board. F2 runaway is a stop-using-it fault - a welded relay heats uncontrollably on the next power-up.
• A shorted oven temperature sensor (RTD) makes the control drive heat to the rail even though the relays are healthy: the GE probe WB21X5301 (AP2023670 / PS236043) reads about 1080-1100 ohms at room temperature, and a SHORTED sensor reads abnormally LOW resistance, so the control thinks the cavity is cold and holds the element on, overshooting toward stuck-on-high. A short typically flags F4 (sensor shorted / resistance too low, below ~900 ohms), while an open or disconnected sensor flags F3 (sensor open / resistance too high, above ~2900 ohms); either can roll into F2 once the cavity actually overheats. We meter the RTD at the two-wire plug on the control before condemning any board - low/out-of-spec resistance is a cheap WB21X5301 fix that mimics the far costlier WB27T relay board.
• A self-clean cycle is the classic trigger for an oven stuck-on-high: GE's high-heat clean pushes the cavity toward 900F, which pits and welds the WB27T board's bake/broil relay and stresses the WB21X5301 sensor and thermal limit - so the 'it ran away right after I cleaned it' call is usually a relay that welded under clean heat or a tripped/failed thermal cutout, with F2 thrown on the way. We check the thermal cutout continuity and meter the sensor together with the relay after any post-clean runaway, rather than condemning the element, which on a stuck-on-high fault is almost never the failed part.
• After replacing a welded infinite switch, an arced receptacle, a shorted radiant, or a stuck-relay oven board, a mis-wired terminal block, reversed line legs, or a floating neutral on the 240V circuit is the reason a stuck-on-high repeats or a new part fails the same way. GE electric ranges run on a dedicated 240V circuit; a bad terminal-block landing or back-fed leg can leave an element energized with the control off. On any REPEAT runaway we verify the terminal-block landing, the 240V legs, and ground before re-condemning a WB24T10025 / WB24X25013 switch, a WB17X5113 receptacle, or the WB27T board, so the new part doesn't die the same way.

GE surface element stuck on high in Toronto — the local specifics

• The recurring GE-in-Toronto stuck-on-high pattern splits clean by cooktop type: on coil and radiant electric tops it is almost always the infinite/surface-element control switch (WB24T10025 / WB24X25013) welded closed with no display code, and we confirm it by continuity at OFF; on the oven side it is the F2 runaway from a welded bake/broil relay on the WB27T board, and these cluster right after a self-clean cycle - the high-heat clean is what pits the relay. The trap we watch for is a shorted WB21X5301 sensor mimicking the costlier board, so we meter the probe before quoting.
• We arrive at GE stuck-on-high calls carrying the WB24T10025 8-inch infinite switch and the WB24X25013 surface-element control switch, the WB17X5113 coil receptacle kit with an 8-inch WB30X253 coil, and the WB21X5301 RTD sensor - the parts that resolve the cooktop and sensor faults in one visit. The WB27T-family oven relay board is the one part we confirm by the unit's model/serial and order in, since GE codes it to the platform.

For the full GE stove module — every fault, part number and code — see GE stove repair in Toronto, and for the same fault across all brands the stove surface element stuck on high guide.