Tempstar Pressure Switch Kit for TSH548HKA100 — Hi & Lo OEM | Ships Today
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Overview
This OEM pressure switch set for the Tempstar TSH548HKA100 includes both the high-pressure switch (part #1184656) and low-pressure switch (part #1184655). These refrigerant safety switches monitor system pressure and open the control circuit to shut the compressor down 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 airflow across the evaporator. A failed or nuisance-tripping switch typically shows up as a unit that won't start, short-cycles, or locks out intermittently with no other obvious fault.
Specifications
| Spec | Value |
|---|---|
| High-Pressure Part # | 1184656 |
| Low-Pressure Part # | 1184655 |
| Type | Refrigerant Pressure Switch (Hi & Lo) |
| Brand | Tempstar (OEM) |
| Function | Automatic-reset compressor protection |
| Circuit | 24V low-voltage control |
Compatibility
Direct-fit OEM replacement for the Tempstar TSH548HKA100 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
- Safety First — Disconnect power, verify zero voltage with a multimeter.
- Access — Remove the control/service panel on the outdoor unit.
- Document — Photo the wiring and note which switch ties to high vs. low side.
- Remove — These mount on Schrader-style fittings; disconnect the leads and unthread the failed switch (no recovery needed on self-sealing ports).
- Install — Thread the new switch onto the matching port, reconnect leads per your photo, and confirm no leaks.
- Test — Restore power, run the unit, and verify 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 problem 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.
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