Question about Marvin W.B. 5460 Quartz Humidifier/Heater

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Thermostat control knob

Mine is broken and I can not find where to buy a new one. Thanks

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  • Anonymous Nov 02, 2008

    Thermo control knob got hot and melted the plastic case. The unit still heats fine but i feel it unsafe to use without replacing themostat control knob.

  • rer0628 Jan 05, 2009

    thermastat controll melted on my 5460 quartz heater and i need to replace it along with the plastic knob. where to purchase?



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  • 79 Answers

(937) 653-7131 is the phone number of W B Marvin, according to my Google search. They should be able to help you get a new knob.

Posted on Mar 22, 2008


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Servicing the Thermostat Control
©2006 Publications International, Ltd.
Thermostat controls regulate the temperature of the refrigerator
and freezer. Remove the control panel to reach the controls.

The thermostat control is usually mounted inside the refrigerator. Its visible control knob is turned to regulate the refrigerator/freezer temperature. The workability of this control can be tested in various ways, depending on the problem. To test the thermostat control:

Step 1:
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Step 2:
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Step 3:
If the refrigerator or freezer runs but the box doesn't cool, unplug the unit and remove the thermostat with a screwdriver. Disconnect both wires from the thermostat. Tape the ends of the wires together with electrical tape, and plug in the appliance. If the refrigerator starts and runs normally, the thermostat is faulty. Replace it with a new one of the same type. Connect the new thermostat the same way the old one was connected.

Step 4:
If the freezer compartment is normal but the refrigerator box doesn't cool, set the dials that control both compartments to mid-range. Remove these knobs (they're usually friction-fit). Then unscrew the temperature control housing; you'll see an air duct near the control. Replace the knob on the freezer thermostat and turn the control to the OFF position. Open the refrigerator door and look closely at the air duct. If this duct doesn't open wider in about ten minutes, the control is faulty. Replace the control with a new one of the same type. Connect the new control the same way the old one was connected.

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