Tempstar Low Pressure Switch for TCH636GKA100 — OEM Refrigerant Safety Control | Ships Today
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Overview
This OEM low-side pressure switch (part number 1184655) is a refrigerant safety control for the Tempstar TCH636GKA100. Wired in series with the 24V control circuit, it monitors low-side (suction) refrigerant pressure and opens the circuit to shut the compressor down if pressure drops below its trip point. That loss-of-charge protection guards the compressor against running on a low or empty charge — a condition that causes overheating, poor lubrication, and eventual compressor burnout. A pressure switch that has failed open prevents the unit from starting at all, while one stuck closed defeats the safety it was installed to provide. Installing the correct OEM low pressure switch restores proper protection and reliable operation.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1184655 |
| Type | Low Pressure Switch (Loss-of-Charge) |
| Brand | Tempstar (ICP / Heil) |
| Control Voltage | 24V Control Circuit |
| Function | Suction-side refrigerant safety cutout |
| Application | AC Compressor / Heat Pump |
Compatibility
Factory replacement low pressure switch for the Tempstar TCH636GKA100 condensing unit. The 1184655 control is used across ICP-family systems sold under Tempstar, Heil, Comfortmaker, and Arcoaire that employ a low-side safety cutout. Verify the connector style and trip rating match your original before installing.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the service/electrical access panel to reach the refrigerant line where the switch is mounted.
- Document — Photograph the wiring and switch location before disconnecting.
- Remove — Disconnect the 24V leads; most low pressure switches use a Schrader-style fitting so the system stays sealed when you unthread the old switch.
- Install — Thread the new switch onto the fitting, snug it without overtightening, and reconnect the control leads per your photo.
- Test — Restore power, call for cooling, and confirm the switch allows the compressor to run with no leaks at the fitting.
Signs You Need a Replacement
- Compressor won't start even though the charge and thermostat are good
- Unit short-cycles or nuisance-trips on the low pressure safety
- Visible damage, corrosion, or a leaking switch fitting
- Continuity test 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.
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