Tempstar High Pressure Switch for TCA948GKA100 — Compressor Safety | Ships Today

Overview

This genuine OEM high pressure switch (part number 1184656) is the refrigerant-side safety control for the Tempstar TCA948GKA100 condensing unit. Wired into the 24V control circuit, it continuously monitors discharge-side pressure and opens to cut power to the compressor if pressure climbs to an unsafe level — for example, from a dirty condenser coil, a failed fan motor, an overcharge, or a blocked airflow path. This prevents catastrophic compressor and line damage. A failed-open or erratic switch can lock the system out and prevent cooling, while a failed-closed switch removes critical protection. Installing the correct OEM high pressure switch restores the unit's built-in safety and reliable operation.

Specifications

Compatibility

Built for the Tempstar TCA948GKA100 and matching ICP-family condensers and heat pumps (Heil, Comfortmaker, Arcoaire). Confirm the switch type and refrigerant fitting against your original before installing.

Installation Guide

1. Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
2. Access — Remove the condenser service panel.
3. Document — Photo the control wiring and switch location before disconnecting.
4. Remove — Disconnect the 24V leads and remove the old switch from its refrigerant port (recover refrigerant if the port is not self-sealing).
5. Install — Thread on the new switch, reconnect the control leads per your photo, and check for leaks.
6. Test — Restore power and verify the system runs and the safety closes the circuit under normal pressure.

Signs You Need a Replacement

• System locks out or will not run on a cooling call.
• Compressor trips off shortly after starting.
• Switch fails to open during a genuine high-pressure event.
• Continuity testing shows the switch stuck open or stuck closed.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.