Tempstar Low Pressure Switch for TCH624GKA300 — OEM Safety Control | Ships Today
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Overview
This OEM low pressure switch (part number 1184655) is the refrigerant-side safety control that protects the compressor in your Tempstar TCH624GKA300 heat pump. It monitors suction-line pressure and opens the 24V control circuit if pressure drops too low — a condition usually caused by a refrigerant leak, a restricted metering device, or frozen coil. By cutting power to the compressor contactor before the compressor can run starved of refrigerant, this switch prevents catastrophic compressor damage. A unit that short-cycles, won't start in cold weather, or trips out on a low-pressure lockout is often signaling either a real pressure problem or a failed switch.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1184655 |
| Type | Low Pressure Safety Switch |
| Brand | Tempstar (ICP / Heil) |
| Function | Compressor low-pressure cutout |
| Control Circuit | 24V |
| Fitment | OEM Replacement |
Compatibility
A direct OEM replacement for the Tempstar TCH624GKA300 heat pump. As a genuine ICP/Heil-family safety control, the 1184655 low pressure switch also fits many comparable Tempstar, Heil, Comfortmaker, and ICP heat pumps and condensing units. Confirm the part number on your existing switch before ordering.
Installation Guide
- Safety First — Disconnect power at the breaker and service disconnect, then verify zero voltage with a multimeter. Note: this switch threads into a pressurized refrigerant line.
- Access — Remove the unit's service panel to locate the low pressure switch on the suction line.
- Document — Photograph the two control wires and the switch's location before disconnecting.
- Remove — Disconnect the 24V control leads. If the switch is not on a Schrader fitting, refrigerant recovery by a licensed technician is required before removal.
- Install — Thread in the new 1184655 switch (use the Schrader port where equipped) and reconnect the control wiring as photographed.
- Test — Restore power, verify the circuit is closed at normal operating pressure, and confirm the compressor starts and runs normally.
Signs You Need a Replacement
- Compressor short-cycles or trips on low-pressure lockout
- System won't start, especially in cold ambient temperatures
- Switch fails to close even when refrigerant pressure is verified normal
- Visible corrosion or damage at the switch body or terminals
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days