Question about Presto HeatDish Compact Heater

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When it is in the off position it still comes on?

When I turn the switch to the off position the heat still comes on?

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  • dell_bean Jan 19, 2009

    My heater worked well until this, the 3rd winter of operation. At some recent point the footlight turned off, but occasionally comes on with coaxing. More important, the temp control dial fails to control output; the unit seems to run full power all the time, and even when switch is turned to the OFF position.

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Removed the 3 screws, the two wires to the heat control, then removed the 2 screws holding the heat control on.
Next, I cut one half off (length wise) the end of an emery board and filed the contacts down.
Now works perfect...

Posted on May 19, 2009

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The previous post is correct that the heat selector switch is at fault. One more detail to look at is how solidly the shaft of the switch is secured to the control body. It is threaded into the control and travels up and down as the shaft is rotated, forcing a little ceramic rod to press on the contacts that carry the heavy current, changing the "on time" of the coil. That rod is made of that material to insulate the shaft electrically from the current being controlled so that you are not exposed to a hefty electric shock by touching the metal shaft. I have seen the threads of the shaft strip and cause the shaft to be pushed back upwards, allowing the contacts return to their normally closed state. Without that downward pressure the contacts just stay closed permanently and the heat stays on full until the heater is unplugged. Eventually the shaft will probably come out completely .
I have tried to find a tap of the appropriate sized to rethread the control, to no avail. It seems to be a special size used only by the Presto factory. In any case just replace the heat control. There are three screws to hold the plastic cover to the dish and two more holding the control to it's mounting bracket. The two terminals on the control will work properly electrically if you accidently reverse them when reassembling the unit but try to return them to their original positions to prevent straining of the wires.

Posted on Feb 21, 2009

  • dsull585 Oct 05, 2010

    Where can you buy the heat control??

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This is most likely a bad selector switch or the contacts inside the unit have been bent out of place. If you take the back cover off of the unit and look at the contacts they should not touch when the selector is in the off position and when you turn it on they should make contact. This is all of course as long as it is not minus 20 in your area.

Posted on Dec 27, 2008

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