Tempstar Pressure Switch Set for TSH448GKA101 — Hi & Lo 24V | Ships Today
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Overview
This OEM refrigerant pressure switch set protects the compressor on your Tempstar TSH448GKA101 heat pump. It includes the high-pressure switch (Part No. 1184656) and the low-pressure switch (Part No. 1184655). These 24V safety switches monitor system refrigerant pressure and open the control circuit to shut the unit down before damage occurs — the high-pressure switch trips on a blocked condenser, overcharge, or failed fan, while the low-pressure switch trips on a refrigerant leak, undercharge, or restricted metering device. Typical failure symptoms include a unit that short-cycles, trips out on safety lockout, or refuses to start because a switch is stuck open. Replacing a faulty switch restores reliable protection and normal operation.
Specifications
| Spec | Value |
|---|---|
| High-Pressure Switch | 1184656 |
| Low-Pressure Switch | 1184655 |
| Type | Auto-Reset Refrigerant Pressure Switch |
| Brand | Tempstar (ICP / Heil) |
| Circuit Voltage | 24V |
| Function | Compressor High / Low Pressure Protection |
Compatibility
Direct-fit replacement for the Tempstar TSH448GKA101 heat pump and related ICP / Heil / Comfortmaker units using part numbers 1184656 and 1184655. Verify the part numbers stamped on your existing switches before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the service panel to reach the refrigerant lines and control wiring.
- Document — Photograph the wire routing on each switch before disconnecting.
- Remove — Disconnect the spade terminals and unscrew the switch from its Schrader-style fitting; expect minimal refrigerant loss on a sealed self-piercing port.
- Install — Thread the new switch onto the matching port, reconnect the control wires per your photo.
- Test — Restore power, confirm the switches stay closed under normal pressure and the unit runs.
Signs You Need a Replacement
- Unit trips out on a high- or low-pressure safety lockout
- Compressor short-cycles or won't start
- Switch reads open on a multimeter at normal operating pressure
- Corroded terminals or a cracked switch body
Shipping & Returns
Ships same day on orders placed 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