How do infinite switches work

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Alumni Pictures. Electric stoves became popular as replacements for solid- fuel wood or coal stoves which required more labor to operate and maintain. Darcel Pundit. How do you test an infinite switch? Remove all wires from the switch terminals. Remember to label them! Set the infinite switch on high and place your ohmmeter on the L2, H2, P and H1 terminals to check for continuity. If there is no continuity between L1 and H1 or between L2 and H2, the infinite switch is defective.

Mateusz Barrameda Reviewer. How do you replace a GE Profile glass cooktop? Disconnect the power to the range, and ensure that all components are completely cool.

Open the oven door, then remove the two vertical bolts from under the front lip of the glass top. Lift the glass top up from off the stove, then unscrew the two connectors on the brackets securing each burner to the glass top.

Oleg Kirsch Reviewer. What is a surface element switch? The surface element control switch —also called a surface burner switch or infinite switch —turns the associated surface element on and off, and controls the heat level for the surface element. Attila Tangara Supporter. Do electric stoves turn off automatically? Automatic Electric Stove Shut Off. Severo Hubenthal Beginner. Do electric ovens have an automatic shut off? Most ovens and ranges with touch pad clock controls will automatically shut off after 12 hours.

The benefit of this is the peace-of-mind and energy savings if the oven is accidentally left on. The internal construction of the control either connects the heater in series with the controlled element or in parallel with it. A series connection causes on-time to be proportional the current in the controlled element which is the line voltage divided by the temperature dependent resistance of the element while a parallel connection is proportional only to the line voltage.

The parallel connection delivers more power to a lower resistance cool element, while the series connection delivers less. The constraint is that the series connected control has to contain a heating element that matches the power rating of the controlled heating element instead of one that matches the national standard voltage.

That allows a range to have reconfigurable cartridges e. The disadvantage is that the control regulates on time percentage, not power input of temperature so the control setting for a particular task depends on the line voltage which varies during the day and its more difficult to control the power input when the temperature of the heating element is held constant, for example by a boiling liquid.

A capillary sensing element was housed in the center of the calrod coil in a spring loaded button that made contact with the center of the cooking pan. Unfortunately, as obviously promising as this idea is, a couple of practical problems have made it uncommon. More than 40 years after the first products a semiconductor based control with equal reliability remains much more expensive than the electromechanical control, and no one has figured out a good way to use a photodiode to peek at the temperature of a pan if you put the lid on.

Very annoying. While my original answer to the original question was largely correct - ie the actual load in the element has no effect on timing, it was substantially wong in another area. I'll go back and edit everything in due course, but for now, original answer is left intact below. I originally could not find a diagram of the internal connections of an "infinite switch" anywhere.

Based on what is written elsewhere it sounded as if the heating coil connected across AC mains. However, this diagram which Dave found on this very interesting fire investigation site tells a different story. More detail below, but a surprising conclusion is that Doubling the element wattage will, for a given setting. You asked about affect of load eg pot on element power. Notionally pot does not load element BUT I'd expect for a given power that element would get hotter due to loss of radiation path and some convection losses and pot reflection.

If element is eg Nichrome this will not effect it. This should be a small effect and depends on Relement being PTC. The above lower ower wity more Watts element effect suggest manufacturers may want to make switches to suit element powers. The electronic circuit below dos not depend o an element in series with the element, unlike the mechanical one.

When the heater is cold the switch is on and the range element will be turned on. The heating energy will be governed by the element current which will depend on the element' Wattage.

So doubling the wattage doubles the current. HOWEVER the series heater will only dissipate a small percentage of the main voltage and the voltage drop across the heater element will be proportional to current if the heater resistance remains constant.

As a consequence heater watts will rise with the square of the current. Please note: This action will also remove this member from your connections and send a report to the site admin.

Please allow a few minutes for this process to complete. How does an infinite switch sense temperature on a steam table. I'll just throw a comment in as well, and since most simply want a fast answer, the fast answer is: An infinite switch has NO idea what the temperature of the steamtable, heatlamp, stove element or warmer. Log in to reply. Original Post 0 of 0 posts June