Troubleshooting Guide

VT-751D and VT-752D
Master Appliance Corp.
2420 18
th
St.
Racine, WI 53403-2381 USA
Tel: [phone]
Email: [e-mail]
www.masterappliance.com
58279E REV A
pg. 7 of 7
TROUBLESHOOTING GUIDE
SYMPTOM
CAUSE
SOLUTION
Excessive Vibration
Motor screw not tight or missing
Recheck that all screws are present and tighten
to correct torque
Blower wheel loose or damaged
Tighten or replace blower wheel if damaged
Unusual Noise
Blower wheel not positioned correctly
on motor shaft
Ensure top of motor shaft is flush with top of
blower wheel hub
Wires rubbing on blower wheel
Ensure wires are in proper position and out of
way of blower wheel
Motor does not run
and element does not
heat
Unit is not plugged in
Plug in unit
Outlet is non-functional
Ensure outlet is live
Switch is not wired properly
Ensure switch is wired properly
Switch is damaged
Test switch and replace if defective
Motor does not run
but element heats
Switch is not wired properly
Ensure switch is wired properly
Switch is damaged
Test switch and replace if defective
Motor is damaged
Replace motor
Motor runs but no
heat
Heating element not install properly
Ensure male terminals of element were fully
seated in female contacts of element connector
Heating element damaged
Check element to see if coils are open, replace if
defective
Element connector damaged
Inspect element connector to see if damaged, if
damaged replace
Element connector, circuit board or
switch not wired correctly
Ensure element connector, circuit board and
switch are wired properly
Circuit board damaged
Test circuit board and replace if defective
Switch damaged
Test switch and replace if defective
Heating element
heats, but does not
adjust when dial is
turned
Dial and gear are not position correctly
Remove dial, turn gear fully counter clockwise,
reassemble dial with the “9” aligned with pointer
Circuit board is damaged
Test circuit board and replace if defective
Dial does not turn, or
full range of
movement not
available
Pot stem not turned or turned fully in
correct direction
Remove dial, turn gear fully counter clockwise,
reassemble dial with the “9” aligned with pointer
Dial is loose
Wave spring not installed
Remove dial and ensure wave spring is present,
reinstall dial