This 5.5KW Sundance Sentry 850/750 Smart Heater Complete Assembly includes Body, Element, Case and Manual Bimetallic Hi Limit with wiring harness. Factory-equivalent unit equipped with BiMetallic Backup high limit and board connection wires matching original specifications. Troubleshooting Tip: If breaker trips during testing, disconnect heater—if breaker remains on when unplugged but trips upon reconnection, heater requires replacement. Otherwise, use Ohm meter across terminals (proper reading: approximately 10.5K ohms; 0K indicates open circuit). If breaker doesn't trip and continuity tests normal, investigate alternate no-heat causes: Flow Switch malfunction, clogged filter, water circulation failure, defective Circulation Pump, or board circuit issues.

Compatible With:
All 2005+ Sundance 800-850 Models for USA/Canada 60HZ
All 2000-2004 Sundance 850/Portofino Models for USA/Canada 60HZ

Replaces Part Numbers:
AI #2-00-0158 / MFG #E2550-3314
AI #SD6500-301 / MFG #6500-301

CRITICAL INSTALLATION NOTE: This Smart Heater features a reduced-diameter dry well. For spa installations manufactured before April 2007, the original Hi-Limit Sensor will NOT fit the new heater's sensor well. Both Smart Heater AND Hi-Limit Sensor must be replaced together as a matched set.