Desa R35D Service Manual page 17

OBSERVED FAULT
Possible Causes External to Heater
Circuit Breaker is Tripped
Check for Broken or Frayed Wires
on Power Cord or Extension Cord
If External Thermostat is Used,
Plug Heater Directly Into AC Source
to Isolate Source of Problem
TEST PROCEDURE
1 Bad Electrical Connection(s) or Wired Incorrectly
Verify that all connections to the ignition control assem-
bly are secure and wired according to the wiring diagram
on page 23.
Checking Fuse
2 Blown Fuse on Ignition Control Assembly
Remove fuse cover and inspect fuse. Check for continu-
Remove fuse cover and inspect fuse. Check for continuity
ity with an ohmmeter. If fuse is open, replace with a fuse
with an ohmmeter. If fuse is open, replace with 113752-01
of the same type and rating (GMA-10).
or a fuse of the same type and rating (GMA-10).
3 Defective Ignition Control Assembly
With motor and ignitor wires disconnected, connect volt-
meter leads to the ignitor terminals. Use the 0 to 200
V.A.C. scale on the voltmeter. Apply power (120V/60Hz)
to the control. The meter should read 120 volts for ten
seconds and then drop to 0 volts. Remove power to con-
trol. Connect meter leads to the motor terminals. Apply
For replacement parts contact:
Hot Surface Ignition Models Service Manual
Ignitor Does Not Heat Up and Motor
Does Not Start Within 5 Seconds
Fuse
Clips
Fuse
Possible Causes Internal to Heater
1 Bad Electrical Connection(s) or
Wired Incorrectly
2 Blown Fuse on Ignition Control
Assembly
3 Defective Ignition Control Assembly
power to control. Meter should read 0 volts for five sec-
onds, 120 volts for 3 to 4 seconds, then drop to 0 volts. If
measurements differ from those described, control is de-
fective and should be replaced.
Meter Leads
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17
Ignitor
Motor
Motor
Ignitor