How To Set The Clock On A Whirlpool Electric Stove

4-1 NORMAL OPERATION

Note: The diagnosis sections of this chapter presume that all other electrical controls, i.e. timer and thermostatic-limit controls, equally described in chapter 2, are operating properly, and the malfunction has been isolated to the heating organization!!!

The heating element is just a big resistor wire, with enough resistance to generate a loftier heat. Usually these arenichrome wire, surrounded in ceramic insulation, with a steel sheath around the ceramic.

In a electric cooktop, the heater elements are coiled into a circular thing called a "surface unit of measurement." A single surface unit of measurement might comprise two or even 3 dissimilar elements all mounted together, with different resistance ratings. Sometimes the wiring is screwed directly to terminals on the ends of the surface unit. Some surface units plug into a receptacle mounted under the cooktop, which makes them more hands removable for cleaning, but too more susceptible to burned connections. (Effigy 4-B)

Figure iv-B: Typical Surface Units

TEMPERATURE CONTROL

To maintain a gear up temperature in an electric cooktop , the chemical element is cycled on and off, usually past a switch called an infinite switch, and then named considering it theoretically provides an infinite number of heat settings. This switch has its own little heater inside, which heats a bimetal switch. (see figure iv-C) A cam attached to the control knob changes bound tension on the bimetal, which changes the amount of heat needed to open the switch.

When the heating element is on, the heater inside the switch is on. The bimetal heats (along with the chemical element) until the contacts open. Then the bimetal cools (along with the elements) until the contacts close again.

There are also fixed-temperature switches that vary the voltage going to the heating elements to maintain fixed, pre-set temperatures. These are usually push-button or rotary switches with fixed settings such as warm, low, medium and high.

In fixed-temperature switch controls, rut levels are varied by applying different voltages (110V or 220V) to different coils of unlike resistances, as shown in figure 4-C.

In an oven, the temperature is controlled past a thermostat. Using a liquid-filled bulb and capillary, the thermostat senses temperature inside the oven and cycles the heating system on and off to maintain oven temperature within a sure range.

Figure iv-C: Temperature Control Switches

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four-two CLEANING HEATING ELEMENTS

Do not put any cleaning agents or solvents direct on heater elements or surface units. The steel sheath is semi-porous; cleaning solvents can penetrate the steel and damage the ceramic insulation or electrically brusque the element. Think almost information technology... when these elements are in operation, they glow red-hot. They will eventually incinerate anything that contacts them. If in that location is whatever carbon or other crusty residue left after that, just scrape it off as best you can.

The exception to this is the solid, or "euro-style" surface units. These units tin exist cleaned; your apparatus parts dealer has a special cleaner for this purpose.

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4-iii TROUBLESHOOTING

When troubleshooting electric cooking equipment, the very commencement thing to do is stand back and observe the big film. What's really going on? If nothing is operating, yous probably take a breaker, fuse or other power source problem. Do the surface units oestrus, but not the oven elements? Does the bake element oestrus, but not the broil chemical element? Does the oven cleaning simply piece of work on Tuesdays in July during a snowstorm? Knowing what's operating and what isn't, in conjunction with a wiring diagram, can betoken you towards the failed component.

In a moment, we'll talk about the general steps to follow. But first, I want to impress upon yous something really important. I know I said this in chapter 2, but it bears repeating. In electric cooking equipment, yous're usually dealing with 220 volt circuits. Practice Not Accept THIS LIGHTLY. 220 VOLTS Tin can KNOCK You OFF YOUR FEET, AND Practise YOUR Torso SERIOUS DAMAGE, VERY QUICKLY. Practice NOT Test LIVE 220 VOLT CIRCUITS.

Unless you are dealing with an obvious, simple repair like a burned chemical element, isolating the problem in a 220 volt cooking circuit basically boils downwards to shutting off the power, testing each component for continuity, and looking for burned or chafed wires. Electric oven or cooktop repairs can be broken down into 3 categories:

iv-3 (a) Ane Chemical element NOT HEATING

In surface units, this is usually caused past a burned out chemical element, terminal, or receptacle. (see figures 4-B and 4-D) It may also be an infinite switch or stock-still-temperature selector switch. Turn the breaker off or pull the fuse, and inspect the element, terminals and receptacle.

Most receptacles are mounted to the cooktop by one or two screws. Some receptacles tin can exist disassembled as shown in figure 4-D to inspect and supercede the internal terminals.

Usually the burned or melted expanse of terminals or elements will be visible, merely exam for continuity, even if it appears to exist OK. A bad chemical element volition show no continuity. A skilful element will evidence some continuity, even though in that location is a lot of resistance.

Figure 4-D: Receptacle Repair

A switch volition testify no continuity when off and proficient continuity when turned on. You should also run across continuity through the bimetal heater inside an infinite switch.

Supervene upon a burned or bad receptacle, terminal, element or switch; repair a broken wire end concluding. When replacing elements, make certain you lot get a replacement element of the right wattage; the element is matched to the command switch.

If an oven chemical element isn't working, exercise non forget rule number one from section two-6 (d): check the automatic baking cycle (timer) controls first! If those are OK, the interruption is usually where the wire attaches to the chemical element, inside the dorsum wall of the oven. Turn the billow off or pull the fuse, remove the screws holding the chemical element into the oven, and pull the element away from the back wall a lilliputian. There is a little bit of extra wire in there to allow you to access it from the front,but do not pull out any more than wire

than yous need to work on it. You may demand to tilt the element upward to become the terminals through the holes. If the wire is broken or burnt completely off the terminal, you may be able to fish the wire out of the hole with needlenose pliers, as long every bit the power is off.

If at that place is a burn in the chemical element, unremarkably it will be visible, but exam the element for continuity, even if information technology appears to exist OK. A bad element will show no continuity. A good element will show some continuity as described in section 2-six(e).

Replace a burned or bad element; repair a cleaved wire end last using special high-temp terminals, available at your apparatus parts dealer.

4-3(b) NO POWER TO OVEN

First, brand absolutely sure you lot have no ability. Check all heating elements, on all settings. Check the clock, timers, and the oven light if whatever. If at least 1 component is operating properly, you take power. Keep in heed that if one leg of the excursion is out due to a house wiring problem, you might take 110 volts but not 220. (encounter section 2-five, page xvi) This might mean the oven lite and clock and even some of the heating elements operate on low power, but the high-heat circuits exercise not work. Information technology too means you nevertheless have power, and you tin nevertheless go zapped.

If you're sure y'all have no ability, we need to figure out if the problem is in the house wiring or inside the oven or cooktop. Beginning, of course, check the business firm breaker or fuse. Next we need to test for power where it enters the oven.

This can sometimes present a problem. In nigh installations, at that place is a 220 volt wall plug. If this is the case, turn the billow off or pull the fuse, pull the oven or range away from the wall, pull the plug out of the wall, turn the breaker back on, and test the wall outlet as described in affiliate 2. As well check the last block for bug as described beneath. The terminal block is where the main ability cord attaches to the oven circuitry. Information technology volition exist merely inside the back somewhere. (see figure four-E)

In some installations, the electrical oven or electrical stove is wired directly into the house wiring. If so, the wiring volition exist connected directly to a concluding block within the unit. Yous demand to follow the steps as described higher up, but while the ability is off, locate the iii-wire final cake every bit shown in figure 4-E.

Figure iv-E: Principal Ability Terminal Block

Inspect the terminal cake for whatever signs of damage; overheating, melted terminals, etc.

Make sure all wiring is clear and brand certain yous don't touch any bare wires or terminals, turn the billow or fuse back on briefly, and cheque the terminal block for ability across all 3 legs every bit shown in chapter 2. Then remove ability again at the breaker or fuse.

If power is not getting to the terminal block, the problem is in your house wiring. During the 70'due south some houses were built with aluminum wiring, which is notorious for non being able to handle oven currents. House wiring repairs are beyond the scope of this manual. There are enough of good books on house wiring; get one of those, or call an electrician.

If power is getting to the terminal block, the problem is obviously somewhere within the oven. In that location may be a master fuse, or a principal switch that everything is routed through. Find your wiring diagram, isolate the problem and repair as described in section four-3(c).

4-3 (c) COMPONENT Problems

I adequately common failure with disruptive symptoms occurs when an infinite switch or a stock-still-temperature switch shorts internally to ground. The symptom volition exist that with the switch off, the indicator light remains on dimly. If this occurs, supplant the lacking switch.

Let'southward say that y'all have ability to the surface units but none to either the bake or broil chemical element. Or let's say the electrical oven comes on, but the cocky-clean function doesn't work. It's time for a wiring diagram. Find the wiring diagram for your automobile as described in chapter 3. Trace the circuits as all-time y'all can and exam components every bit described in chapter 2. The wiring diagram tin can be very complex and difficult to follow, merely the general objective is to trace the malfunctioning circuit equally described in department 2-5, detect the components in information technology and check them for continuity. Also check for burned wires, specially in the back of the oven. It might aid to make several copies of the wiring diagram and trace the circuit that you're interested in with a colored highlighter pen.

Replace the bad component, or repair damaged wires with special loftier-temp wire and connections, available at your appliance parts dealer.

This covers the basic for Electrical Oven Repair | Electrical Stove Repair.

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