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