Question about Presto HeatDish® Plus Footlight® Electric Heater

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Unit is inoperative- have checked wiring and appears ok, seams to have 120 volts to switch, but not beyound.

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OK, first use a meter to check that the switch actually closes and allows the current through the switch. If the switch is OK, then usually heaters have a "Thermal Fuse" or an Overheating Switch, if the heater is overheated this device will go permanently "Open Circuit' and stop the flow of current to the element.
The circuit is usually from the phase to the switch, through the switch on to the thermal fuse, possibly then if it has a thermostat through those contacts, and on to the "Hot" side of the element, the "Other" or "Cold" side of the element then is connected to the neutral,or return, thus the circuit is complete.
The element should have a resistance, of between 12 to 18 OHMS.. it shouldn't be Open Circuit.
When closed the switch should be Zero 0 OHMS. (Short Circuit) Same as for a "Good" thermal Fuse.
You should in a good working system have 120 V AT the "Hot" side of the element, (The side closest to the switch)

Posted on Nov 15, 2010

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