Tempstar High Pressure Switch for TCA748GKA200 — Auto-Reset | Ships Today
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Overview
This genuine OEM high pressure switch (part number 1184656) protects the Tempstar TCA748GKA200 from dangerously high refrigerant discharge pressure. The switch is wired into the 24V control circuit and opens to shut down the compressor whenever system head pressure climbs above its trip point — a critical safety device that prevents compressor damage, refrigerant line rupture, and unsafe operating conditions. A failed or nuisance-tripping high pressure switch will cause the unit to short-cycle, lock out, or refuse to start, often misdiagnosed as a control board or contactor problem.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1184656 |
| Type | High Pressure Switch |
| Brand | Tempstar |
| Function | High-side safety cutout |
| Control Voltage | 24V |
| Application | Compressor protection |
Compatibility
Direct-fit replacement for the Tempstar TCA748GKA200 condensing unit and shared across many ICP-family outdoor units (Heil, Comfortmaker, Arcoaire) using the same high-side safety control. Confirm the part number and connection style on your existing switch before installing.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
- Access — Remove the control panel access cover to reach the switch and its terminals.
- Document — Photograph the two control wires and their terminal locations before disconnecting.
- Remove — Recover or pump down refrigerant as required, then disconnect the wires and unthread the old switch from its Schrader-style fitting on the high-side line.
- Install — Thread on the new switch with a fresh seal, reconnect the control wires per your photo, and leak-check the connection.
- Test — Restore power, start the system, and confirm the unit runs without nuisance tripping and that head pressure stays in range.
Signs You Need a Replacement
- Compressor short-cycles or locks out on a high pressure fault.
- Unit will not start even with normal pressures.
- Switch shows open continuity when system pressure is normal.
- Intermittent cooling with no clear airflow or charge issue.
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