The Quick Coil-Swap Test (Traditional Coil Tops)
If your electric range has plug-in coil elements, diagnosing whether the problem is the burner itself or the internal stove wiring takes less than two minutes without tools.
Make sure the stove is off and completely cool. Unplug the non-working 6-inch or 8-inch burner by pulling it straight out from its porcelain receptacle block. Take a known working burner of the exact same diameter from the opposite side of the range and plug it into the suspect socket. If the replacement burner heats up immediately, the original element has an open internal nichrome heating wire. If the replacement burner also fails to heat, the problem is downstream: either a melted terminal receptacle block or a dead infinite rotary switch.
1. Pitted Prongs and Melted Terminal Receptacle Blocks
Every time a heavy pot shifts on a coil burner, the two metal element prongs rock inside the brass contact clips inside the receptacle block under the cooktop. Over years of thermal expansion and microscopic arcing, these contacts oxidize, build electrical resistance, and overheat.
Lift your stovetop lid and inspect the black ceramic or plastic terminal block where the element prongs seat. If you see black scorching, melted plastic, or loose, pitted metal clips, the connection is broken. Technician rule: Never replace just the burner when the receptacle is scorched. A pitted receptacle will destroy a brand new $60 burner coil within three weeks. Always replace the terminal block and burner as a matched pair.
2. The Infinite Rotary Switch: Dead vs Stuck on Max Heat
Unlike light switches that supply steady power, an electric stove burner infinite switch regulates temperature by pulsing 240 volts ON and OFF using an internal bimetal strip and heater coil. When you select '3', the element stays energized for roughly 20% of each minute.
Infinite switches fail in two distinct ways:
Symptom A: Burner only runs on maximum (cherry red) regardless of knob position. The internal mechanical contacts have arced and physically welded together. The switch cannot cycle open. This is a severe fire hazard. Turn off the 40-amp double-pole range breaker immediately.
Symptom B: Zero heat at any setting, but element tests good. The bimetallic heater inside the switch has burned open, or the main power bus contact has broken. The switch requires direct replacement.
3. Smooth Glass Radiant Cooktop Element Burnouts
On smooth glass-ceramic cooktops, the heating elements do not plug into loose receptacles; they are suspended ribbon coils mounted in insulating ceramic trays clamped beneath the glass. Each radiant burner assembly contains an integral rod limiter (thermal cut-out switch) designed to prevent the ceramic glass from shattering if an empty cast iron pan is left on high.
If a glass-top burner refuses to illuminate, technicians test resistance across the two outer power spade terminals with an ohmmeter (breaker safely OFF). A standard 1500W to 2500W radiant burner should read between 20 and 50 ohms. If your meter displays OL (Open Loop / infinite resistance), the ribbon trace has broken and the burner assembly must be replaced.
4. Checking Your 240V Range Circuit Breaker
An electric range requires two separate 120-volt legs from your main electrical panel to produce 240V. Occasionally, one half of the double-pole 40A or 50A breaker trips while the other half remains connected. When this occurs, the clock, oven light, and digital display will light up normally (running on the surviving 120V leg), but none of the stove burners or bake elements will produce heat. Always fully reset the range breaker (flip completely OFF then ON) before replacing parts.
Professional Electric Range Diagnostics Across Victoria
West Coast Wrench provides licensed electrical appliance repair for freestanding and slide-in electric ranges from Whirlpool, Frigidaire, GE, Samsung, LG, and KitchenAid across Greater Victoria, Oak Bay, Saanich, and the Peninsula.