Tempstar Pressure Switch Kit for TSH548GKA200 — Hi & Lo OEM | Ships Today

Overview

This OEM pressure switch set for the Tempstar TSH548GKA200 includes both the high-pressure switch (part #1184656) and the low-pressure switch (part #1184655). These refrigerant safety switches sense system pressure and open the control circuit to stop the compressor before damage occurs — the high-pressure switch protects against a blocked condenser, dirty coil, or overcharge, while the low-pressure switch guards against loss of charge, a restricted metering device, or low evaporator airflow. A failing switch usually appears as a unit that won't start, short-cycles, or intermittently locks out with no other obvious cause.

Specifications

Compatibility

Direct-fit OEM replacement for the Tempstar TSH548GKA200 condensing unit. These switches are shared across related ICP/Heil/Comfortmaker heat pump and AC platforms using the same refrigerant safety circuit. Verify the connector style and pressure trip ratings against your existing switches before installing.

Installation Guide

1. Safety First — Disconnect power, verify zero voltage with a multimeter.
2. Access — Remove the control/service panel on the outdoor unit.
3. Document — Photo the wiring and note which switch ties to the high vs. low side.
4. Remove — These mount on self-sealing Schrader-style fittings; disconnect the leads and unthread the failed switch.
5. Install — Thread the new switch onto the matching port, reconnect leads per your photo, and check for leaks.
6. Test — Restore power, run the unit, and confirm the compressor energizes and pressures stabilize.

Signs You Need a Replacement

• Compressor won't start even though the contactor pulls in.
• Unit short-cycles or locks out with no charge or airflow fault found.
• Switch fails a continuity test at normal operating pressure.
• Visible corrosion, cracked housing, or damaged terminals.

Shipping & Returns

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