Specifications

107
Trouble Possible causes Corrective action to be taken
Excessive heat
First repair the thermostat control.
Then replace or repair the sole-plate,
depending on its condition.
Blisters on
sole-plate
Rough spot, nick, scratch, burn on
sole-plate.
Remove these spots with fine emery
and polish the area with buff.
Thermostat switch contacts are
welded together.
Check the thermostat switch contact.
Open them by force. The contact
points should be in open condition at
off position of the control knob.
Loose connection.
Clean and tighten.
Broken wire.
Repair or replace.
Dirty sole-plate.
Clean.
Excessive starch in clothes.
Iron at a lower temperature. Use less
starch next time.
Wrong setting of the thermostat
knob.
Set the knob to correct temperature.
Iron too hot for fabric being ironed.
Lower the thermostat setting.
Disconnected earth connection.
Check earth connection and connect
properly.
Weak insulation of heating
element.
Check insulation resistance of heating
element; if necessary replace element.
Earth continuity with common
earth not available.
Check the main earth continuity and
connect properly.
Tears clothes.
Iron cannot be
turned off
Power cord
Sticks to clothes
Iron gives shock
QUESTIONS
Part - A
Choose the Correct Answer (1 Mark)
1. Pick the odd one out
A) Heating element B) Nichrome C) Sole plate D) Pressure plate
2. Heating element of electric iron box is made up of
A) copper B) Chromium C) Silver D) Aluminium
3. The upward traveling heat, developed in heating element of iron box, due to conduction and
radiation is prevented by
A) sole plate B) pressure plate C) Asbestos sheet D) Heel plate