Using a multimeter set to volts AC

When troubleshooting Raypak heater pilot flickering or ignition failure

the RS-AD is built to handle the oil-water emulsions common in lubricated systems without clogging or seal failure

Industrial Durability: Features a rugged cast aluminum body and a long-lasting beaded molded neoprene diaphragm for extended service life in high-cycle environments

Fenwal 35-652505-003 Ignition Module Refrigerant Using a multimeter set toThe Fenwal 35 652505 003 Ignition Module is a professional grade, microprocessor based Hot Surface Ignition (HSI) control designed specifically for Laars water heaters and boiler systems. As a critical component of the Fenwal 35 65 series, this module utilizes advanced logic to supervise the sequence of operation, including the inducer motor, pressure switch monitoring, and remote flame sensing. It features a field selectable 120 240 VAC input,