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Ranges, wall ovens and cooktops fail in fairly predictable ways. An electric oven stops heating because a bake or broil element burns open. A coil burner on the cooktop runs only on high, or not at all, because the infinite switch or the receptacle has failed. A gas oven takes forever to light, or never lights, because the igniter has weakened. None of those problems require a new range. They require the right replacement part, matched to the model.
This category covers the parts we see replaced most on cooking appliances: bake and broil elements, surface elements, infinite switches, gas oven igniters, surface element receptacles, drip pans, range power cords, range hood filters and thermocouples. Supco builds these to fit the major platforms, including Whirlpool, GE, Frigidaire, Kenmore, Maytag, Amana and many others. Appliance techs, landlords and property maintenance teams rely on them to keep units in service without the cost and lead time of a full replacement.
Start every repair by locating the model and serial tag (often behind the storage drawer, under the cooktop, or on the oven frame) and matching the OEM part number.
Electric ovens run on 240 volts and use two main heating elements. The bake element sits at the bottom of the cavity, sometimes hidden beneath the floor panel, and the broil element is mounted at the top. The control or thermostat cycles them on and off based on a temperature sensor in the cavity.
Electric coil cooktops use plug-in surface elements that seat into receptacles (terminal blocks). Each burner is controlled by an infinite switch, which cycles power on and off at a rate set by the knob position. A setting of 3 does not lower voltage; it simply keeps the element on for a shorter share of each cycle. Drip pans sit beneath each element to catch spills and reflect heat.
Gas ovens on most modern ranges use a hot surface igniter wired in series with a safety gas valve. The igniter heats up and its resistance drops, allowing enough current to flow to open the bimetal valve. If the igniter is weak, it may glow orange but never pass enough current to open the valve, so the oven never lights. Older gas ranges and some commercial-style units use a standing pilot and a thermocouple, which generates a small voltage when heated by the pilot flame and holds the gas valve open. If the pilot goes out, the thermocouple cools and the valve closes.
Range hoods use grease filters (aluminum mesh or baffle) on ducted models, and charcoal filters on ductless or recirculating models to capture odors.
Ordering by OEM part number is the safest path, and Supco product pages list the OEM numbers each part replaces. A few selection rules by part:
| Part | Appliance Type | Key Match Points | Replace When |
|---|---|---|---|
| Bake element | Electric oven | OEM number, wattage, shape, terminals | Open circuit, blistered or cracked |
| Broil element | Electric oven | OEM number, wattage, shape | Open circuit, visible damage |
| Surface element | Electric coil cooktop | Size (6 or 8 in.), wattage, terminals | No heat, warped, burned terminals |
| Infinite switch | Electric cooktop | Voltage, amperage, shaft, terminals | Stuck on high or no control |
| Receptacle | Electric coil cooktop | Terminal style, mounting | Burned or loose terminals |
| Oven igniter | Gas oven | Flat or round, current rating | Glows but oven won't light |
| Thermocouple | Standing pilot gas | Length, valve fitting | Pilot won't stay lit |
| Range cord | Electric range | 3-wire 10-50 or 4-wire 14-50 | Damaged, or receptacle change |
Supco has been building replacement parts since 1945, with components engineered to match OEM fit and function. HVAC365 product pages include OEM cross-reference numbers and spec details so you can verify compatibility before ordering. Parts in this category ship in 3-5 business days.
Usually, yes. A weakened igniter can glow but not draw enough current to open the safety valve. Testing amperage in the igniter circuit confirms it. Because this is gas work, have a qualified technician make the diagnosis and replacement.
If the old element's terminals or the receptacle show burning, pitting or discoloration, yes. A damaged receptacle will quickly burn out a new element.
A 3-wire cord (NEMA 10-50) uses two hots and a combined neutral and ground. A 4-wire cord (NEMA 14-50) adds a separate ground. Most current codes require 4-wire for new installations. Match the cord to the wall receptacle.
Only if the replacement is listed for your OEM number. Slight differences in wattage, terminal position or mounting plate can cause poor fit or uneven baking.
Metal grease filters can usually be cleaned and reused until damaged. Charcoal filters cannot be cleaned and should be replaced periodically, typically every few months with regular cooking, or per the hood manufacturer's recommendation.
On standing-pilot appliances, it senses the pilot flame and holds the gas valve open. If the flame goes out, it cools and the valve closes to stop gas flow. A weak thermocouple lets the pilot go out repeatedly.
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