74 Part Number STH042 3/14
Safety Limit 3
Freeze time reaches 4 minutes and water is not
sensed.
Possible Cause Checklist
Improper installation
• Refer to “Installation/Visual Inspection Checklist”
on page 64.
Water System
• Dirty/defective water dump valve
• Low water float valve dirty or defective
• Vent tube not installed on water outlet drain
• Low water pressure (20 psig min.)
• Dirty defective water filter (when used)
• Loss of water from sump area
• Dirty/defective water inlet valve
Electrical system
• Water inlet valve coil defective
• Low water float valve defective
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