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Page 9 American Metal Ware Hot Water Boiler
C)
D)
Auto refill fails to
fill water tank
(continued).
Auto Refill is erratic.
PROBLEM
IV) Trouble Shooting Auto Refill, Low Water Cutoff, and Dual Level Control System (continued)
POSSIBLE CAUSE SERVICE CHECK REMEDY
3)
4)
5)
6)
7)
8)
1)
2)
3)
Water strainer clogged.
No power on Dual
Level Control.
Fill solenoid valve
clogged with scale
or frozen closed.
Fill solenoid valve
coil inoperative
Electrodes shorting to
ground.
Dual Level Control
faulty.
Electrode shorting to
ground completely or
intermittently.
Loose connection.
Dual Level Control
faulty.
Water pressure before
strainer and not after.
Check for 120V AC across
“H” and “N” terminals.
Disassemble.
Jumper from “FILL”
terminal to “H” terminal
does not start fill.
Tank fills with electrode
wire disconnected from
“HI” terminal.
Tank does not fill
with electrode wire
disconnected from “HI”
terminal.
Tank fills with
electrode wire
disconnected from “HI”
terminal
Visual. Check for “C” and
“HI” probe terminals as well
as “FILL.” Also check
neutral (white) wire at valve.
Tank does not fill with
electrode wires disconnected
from “XL” and “H” terminals.
Remove and clean micromesh screen
filter located in water strainer.
If voltage missing or incorrect,
check wiring for looseness, breaks,
and proper connections.
Clean out and/or replace plunger
assembly or entire valve. May require
new coil. Caution is advised to avoid
damage to valve. See valve instruction
sheet.
Replace coil. Also check for frozen
plunger. See valve instruction sheet.
Replace electrode assembly. If no
remedy, check for improper wiring
(cut insulation) or electrode tips
touching metal.
Replace Dual Level Control.
Replace electrode assembly.
Push wire lead connector securely
onto terminal(s). Replace connector
if wire is frayed or broken.
Replace Dual Level Control.