304629000 Nordyne Door Switch

304629000 Nordyne Door Switch Normal Stock Item The 304629000 Nordyne Door Switch is an OEM furnace access‑door safety interlock switch used across many Nordyne / Miller / Intertherm mobile‑home furnace families. It functions as a normally‑closed mechanical hinge‑lever switch that opens the circuit when the blower door is removed—preventing operation during service and protecting against electrical shock or gas‑related hazards. Part Number: 304629000 Type: Mechanical door safety switch Operation Mode: Automatic, Normally Closed (opens when door is removed) Actuator Style: Hinge‑lever door‑mounted Terminals: Screw‑type stainless‑steel terminals for secure wiring Material: Stainless steel body and contacts for durability and corrosion resistance Weight: ~0.75 lb / 340 g (PartsHnC listing) Compatibility Designed for Miller / Nordyne CMF series furnaces Not used in CMF2 models (Amazon + Walmart listings confirm exclusion) Common across mobile‑home furnace families including Miller, Intertherm, Nordyne, Broan (Walmart listing) ⚠️ Common Failure Symptoms Furnace will not run unless pressure is applied to the door Intermittent shutdowns during operation System runs only when switch is manually pressed Furnace remains off even with the door installed (classic failed interlock) Use Case This switch is a critical safety component: When the door is closed → circuit stays closed → furnace operates When the door is opened → circuit opens → furnace shuts down to prevent hazards