the MDM-Z is a direct replacement motor for ZoneFirst ZDM

For technicians performing HVAC part replacements

Always verify the voltage and lead configurations against the existing draft inducer motor to ensure circuit board compatibility during installation

Arcing is a primary cause of premature contact wear and circuit failure

Field Efficiency: Direct factory replacement eliminates the need for universal adapters

Resideo S8701A1034 Ignition Module 318518-761 the MDM-Z is a directResideo S8701A1034 is a direct spark ignition (DSI) module featuring an 11 second trial for ignition and a 30 second pre purge cycle, designed for gas fired HVAC equipment including furnaces, boilers, and rooftop units. It manages burner startup by initiating a pre purge sequence to clear the combustion chamber before ignition, then provides spark ignition and flame verification for safe operation. This ignition control is commonly used as a