XPart Supply Ltd. / aftermarket universal replacement; documented equivalent to Supco SH502 Refrigerator Drain Heater – Universal Fit 502XP

Universal 120-volt, 15-watt silicone drain heater for commercial and domestic refrigeration systems. The documented SH502 specification is 13 inches long with 18-inch leads and a 7/16-inch-diameter heater tip. It is designed to prevent drain-line ice buildup; the heater cannot be cut, spliced, extended, overlapped, or otherwise altered.

Is This the Right Part?

Common Symptoms

• Water pooling beneath the crisper drawers or at the bottom of the fresh-food compartment
• Water leaking onto the floor from a backed-up defrost drain
• Ice buildup near the evaporator or freezer drain area
• Drain blockage or refreezing that returns after manual defrosting

Check Before Replacing

• With the appliance unplugged, inspect the drain area for visible ice blockage or water backup.
• After safely clearing accessible ice, observe whether water drains freely rather than backing up.
• Check the heater’s visible insulation, braid, leads, and connections for damage without cutting, splicing, or altering the heater.
• Verify that the heater is not overlapped or positioned where it can sit submerged in water.
• Have a qualified technician verify heater electrical operation against the appliance’s service instructions and the heater’s 120-volt, 15-watt rating.

Pro Tip

Part Details

Key Features

• 120-volt, 15-watt rating
• 13-inch heater size with 18-inch leads
• 7/16-inch-diameter heater tip
• Silicone construction
• Durable metal braid
• Designed for continuous use in commercial and domestic refrigeration systems

Installation Notes

• Disconnect power before servicing the appliance.
• Access and clear the drain area before installing the heater; do not rely on the heater to melt an existing heavy blockage immediately.
• Install the heater in the drain location according to the appliance service instructions and the heater instructions, maintaining proper contact with the drain area.
• Route the leads without pinching, overlapping, cutting, splicing, extending, or otherwise modifying them.
• Ensure the heater cannot remain submerged in standing water, then restore covers and wiring exactly as specified by the appliance service instructions.