Hood Thermal Cutout; Bottom Thermal Cutout; Magnetron Thermal Cutout - Kenmore 401.85052010 Service Manual

6. Alignment and Adjustments

6-8-3 Hood Thermal Cutout

This cutout will protect the touch control from excessive heat
by turning the vent fan on at low speed . If the surface units
of the range are used for long periods of time heat will build
up and could damage the microwave control . In order to
prevent this a thermal cutout is installed on the duct behind
the control . This cutout will close (158°F/70°C - vent fan
energized)and open (104°F/40°C - vent fan de-energized)
depending on temperatures it sense .
To Remove hood Thermal Cutout :
1. Disconnect power and remove grill .
2. Remove control box assembly .
3. Remove two wire leads and unscrew one screw capturing
cutout on duct .
NOTE : It this cutout were to open it would be difficult to detect.
The only time it functions is during an overheat condition . It
will be normally open when checked with an ohmmeter .

6-8-4 Bottom Thermal Cutout

THIS COMPONENT REQUIRE REMOVAL OF MICROWAVE OVEN FROM INSTALLATION FOR SERVICING.
During a fire on the stove the heat could be intense enough to close the Hood Thermal Cutout and force the fan
to run. While at moderate high temperature we do want it to run, however during a fire it is advantageous to NOT
have the vent fan running. So if a fire were to start on the stove top the Bottom Thermal Cutout would open at
248°F(120°C) and remove all power to the microwave oven .
This cutout is designed to not be resetable .
To Remove Magnetron Thermal Cutout :
1. Disconnect power and remove grill .
2. Remove control box assembly .
3. Remove two wire leads and unscrews one screw capturing cutout on base plate .

6-8-5 Magnetron Thermal Cutout

The magnetron thermal cutout is located above the leads
to the magnetrons . It is designed to prevent damage to
the magnetron if an overheated condition develops in the
tube to cooling fan failure, obstructed air ducts, dirty or
blocked air intake . Under normal operation, the magnetron
thermal cutout remains closed . However, when abnormally
high temperatures are reached within the magnetron, the
magnetron thermal cutout will open at 302°F(150°C) causing
the oven to shut down . After the temperature drops to 140°
F(60°C) it will reset and cooking will be able to resume .
To Remove Magnetron Thermal Cutout :
1. See 'Removing Magnetron' .
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