What are the specs for this Pressure Switch?

The correct replacement for Tempstar model T4H419GKD100 — Refrigerant Safety | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Tempstar equipment which lists the model number T4H419GKD100 — Refrigerant Safety | Ships Today.

Is this pressure switch compatible with Bryant or Payne systems too?

Many Tempstar parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

Tempstar

Tempstar Low Pressure Switch for T4H419GKD100 — Refrigerant Safety | Ships Today

Name: Tempstar Low Pressure Switch for T4H419GKD100 — Refrigerant Safety | Ships Today
Brand: Tempstar
SKU: 1177594-GEN
Price: 34.95 USD
Availability: InStock

SKU: 1177594-GEN Brand: Tempstar

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Overview

This OEM low pressure switch assembly (part 1177594) is a refrigerant safety control for the Tempstar T4H419GKD100. It monitors suction-side pressure and opens the control circuit if pressure drops below a safe threshold — protecting the compressor from running on a low charge, a blocked metering device, or loss of refrigerant. When it trips, the unit locks out the compressor to prevent damage. A failed or stuck switch causes nuisance lockouts or, worse, allows the compressor to run unprotected.

Specifications

Spec	Value
Part Number	1177594
Type	Low Pressure Switch Assembly
Brand	Tempstar (ICP)
Function	Suction-Side Safety Cutout
Control Voltage	24V

Compatibility

Made for the Tempstar T4H419GKD100 and matching ICP/Heil/Comfortmaker systems using this low pressure cutout. Verify the part number and trip/reset pressure settings against your original switch.

Installation Guide

Safety First — Disconnect power and verify zero voltage with a multimeter. Confirm the system charge before condemning the switch.
Access — Remove the condenser service panel to reach the switch on the suction line/port.
Document — Photograph the wiring and switch port location before disconnecting.
Remove — Disconnect the leads; if it threads onto a Schrader port, unthread it (minimal refrigerant loss); if brazed, recover refrigerant first.
Install — Thread or braze the new switch onto the port, reconnect the leads per your photo, and evacuate/recharge if the system was opened.
Test — Restore power and confirm the unit runs without nuisance low-pressure lockouts.

Signs You Need a Replacement

Compressor locks out on low pressure with a verified-good charge
Switch won't close even at normal operating pressure
Intermittent or nuisance safety trips
Failed continuity test across its proper pressure range

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

Tempstar Low Pressure Switch for...

$34.95

Frequently Asked Questions

Does this Pressure Switch fit my Tempstar T4H419GKD100 — Refrigerant Safety | Ships Today?

Yes. This is the factory-specified OEM pressure switch for the Tempstar T4H419GKD100 — Refrigerant Safety | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the pressure switch on my Tempstar T4H419GKD100 — Refrigerant Safety | Ships Today?

Difficulty: Medium (20–30 min)
Step 1: Turn off power. Step 2: Locate pressure switch near draft inducer. Step 3: Note tubing orientation. Step 4: Disconnect tubing and wires. Step 5: Remove screw, install new switch. Step 6: Reconnect tubing and wires, restore power.

My furnace shows a pressure switch error. What do I replace?

Furnace LED showing pressure switch error = switch not detecting draft inducer airflow. Try first: clear the rubber tubing to the switch (often clogged with condensation). If problem persists, replace the pressure switch.

Is this pressure switch compatible with Bryant or Payne too?

Many Tempstar parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Tempstar pressure switch?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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