OEM Carrier 3-Pole Contactor 40A 208/240V for Model ROA1000L5J — HN53CD209

This OEM Carrier contactor is the factory-specified high-voltage switching relay for the Carrier ROA1000L5J rooftop packaged unit. The contactor receives a low-voltage signal from the control board and closes its contacts to deliver line voltage to the compressor and fan motor circuits. When it fails, symptoms include the unit refusing to turn on, audible chattering or humming at the contactor, pitted or burned contacts visible on inspection, or — in the case of a welded contactor — the compressor running continuously even when the thermostat is satisfied.

• Specs: 3-Pole | 40A Full Load Amps (FLA) / 50A Resistance | 208/240V Coil | OEM Part Number HN53CD209 | Factory-matched contact material and coil pull-in voltage
• OEM vs Generic: OEM contactors use factory-spec silver-alloy contact tips and precision coil windings. Generic substitutes often carry ±15% coil tolerance, increasing chatter risk and reducing contact service life under high-cycle commercial loads.
• Install difficulty: 3/5 — A licensed HVAC technician is strongly recommended for commercial rooftop equipment. Always lock out/tag out (LOTO) all power sources before servicing. Tools needed: flat/Phillips screwdrivers, needle-nose pliers, multimeter for coil continuity verification, and torque screwdriver for terminal tightening. Photograph all wiring before removal.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as the direct OEM replacement for Carrier model ROA1000L5J packaged rooftop units. Verify pole count, amperage, and coil voltage against your unit's wiring diagram and nameplate before ordering. Our fitment specialists are available to confirm compatibility before you buy — no guesswork required.