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This OEM 2-pole definite purpose contactor is the factory switching relay for the ICP/Tempstar/Heil RGS091HFAB0AAAA. Two ratings are offered: 30 amp (part 1178074) and 40 amp (part 1178211), both with a 24V control coil. The contactor uses the 24V signal from the thermostat/control board to energize its coil, closing the line-voltage contacts that power the compressor and condenser fan motor. Contactors are a high-wear component — the contacts arc every cycle and eventually pit, burn, or weld. Common failure symptoms include the outdoor unit not starting, a humming or chattering contactor, contacts that stick closed (unit runs continuously), or visible burning/pitting on the contact points.
| Spec | Value |
|---|---|
| Part Number | 1178074 (30A), 1178211 (40A) |
| Type | 2-Pole Definite Purpose Contactor |
| Poles | 2 |
| Amperage | 30A / 40A |
| Coil Voltage | 24V |
| Brand | ICP / Tempstar / Heil |
| Fit | OEM Direct Replacement |
Direct OEM fit for the ICP/Tempstar/Heil RGS091HFAB0AAAA. Match the original amp rating (30A or 40A) and 24V coil before ordering.
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.