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TROUBLE SHOOTING PROCEDURES FOR QUALIFIED
PROBLEM
Water fails to heat
Water does not
stop filling
Water does not fill
SERVICE PERSONNEL ONLY
POSSIBLE CAUSES
Line Fuse
or
Circuit Breaker
Hi-Limit Switch
No voltage reading at
element
a. Defective
thermostat
b. Defective Hi-
Limit switch
Thermostat
Stuck valve
Worn valve seat
Float ball filled
with water due to
leak
Stuck filling
valve
Hung up float
Water line
clogged
5
SOLUTIONS OR REMEDIES
Check for circuit overload before resetting
breaker or replacing fuse.
If Hi-Limit switch opens when water temp.
reaches 200 degree F, replace switch.
Check voltage across terminals 1 and 3 of
Hi-Limit switch. If no reading replace
thermostat.
Check voltage across terminals 2 and 4. If
no reading — depress red button. Still no
reading — replace Hi-Limit switch.
Pilot light should be on when thermostat
is in the full on position (#5 position). If
not — replace thermostat and recalibrate
(see calibration). Power supply should
meet or exceed power requirements of
water boiler. Check data label on control
box for power requirements.
Replace valve
Replace valve
Replace float ball
Check float ball. It should move easily up
and down. If not — replace valve.
If float ball linkage does not move freely,
replace valve
Shut off water supply. Disconnect inlet
line. Clean or replace.
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