Tempstar Low Pressure Switch for TCH936GKA200 — Refrigerant Safety | Ships Today
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Overview
The Tempstar OEM low pressure switch (part #1184655) is the refrigerant-side safety control for the TCH936GKA200 condensing unit. Wired in series with the compressor control circuit, it monitors suction-line pressure and opens the circuit to shut down the compressor if pressure drops below a safe threshold — protecting against a low-charge condition, a frozen evaporator, or a loss-of-charge event. When the switch fails or is stuck open, the compressor will not run or will short-cycle; a switch stuck closed removes the protection and risks compressor damage. Symptoms include a unit that won't cool, repeated lockouts, or a compressor that trips off shortly after starting.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1184655 |
| Type | Low Pressure Switch (auto-reset) |
| Brand | Tempstar (ICP / Heil) |
| Function | Loss-of-charge / low-pressure compressor cutout |
| Circuit | 24V control circuit, normally closed |
Compatibility
This is the factory-specified low pressure switch for the Tempstar TCH936GKA200 and matches the refrigerant safety control used across compatible ICP, Heil, and Comfortmaker condensing units. Verify the connection fitting and electrical terminal style against your original switch before installing.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
- Access — Remove the condenser electrical access panel to reach the control wiring and refrigerant port.
- Document — Photograph the switch wiring and mounting port before disconnecting.
- Remove — Disconnect the leads and unthread the switch from its Schrader-style port (most use a self-sealing fitting, so no recovery is needed).
- Install — Thread the new switch onto the port and reconnect the leads per your photo.
- Test — Restore power and confirm the compressor starts and runs without nuisance trips.
Signs You Need a Replacement
- Compressor won't start even with a proper refrigerant charge
- Repeated low-pressure lockouts or short-cycling
- Switch fails a continuity test at normal operating pressure
- Unit cools poorly or trips off shortly after starting
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
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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
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