97-610, 97-6152 • REV. 7/04
23
PRESSURE
W
ASHER
T
ro
u
b
leshooting Guide
MAINTENANCE & SERVICE
C. System Resistance Check
(“C” Reading = Switch contacts CLOSED - Gas
Cock “ON” - Main burner should be ON)
If the “C” Reading is more than that specified
for the system being checked, this indicates the
resistance in the system is excessive and must
be reduced. To correct:
a. Clean and tighten switch leads and connec-
tions.
b. Shorten switch lead wires and/or replace
with heavier gauge wire.
c. Cycle switch rapidly to clean contacts.
D. Automatic Pilot Dropout Check
1. Hold gas cock dial depressed in pilot position
until maximum output is observed. Then extin-
guish pilot and observe meter.
2. Dropout of automatic pilot magnet (sound should
be audible) should occur between 120 millivolts
and 30 millivolts. If dropout occurs outside these
limits, change the automatic pilot magnet assem-
bly.