What are the specs for this Pressure Switch?

The correct replacement for Tempstar model T4H360GKD100 — OEM 1177594 | 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 T4H360GKD100 — OEM 1177594 | 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 Assembly for T4H360GKD100 — OEM 1177594 | Ships Today

Name: Tempstar Low Pressure Switch Assembly for T4H360GKD100 — OEM 1177594 | Ships Today
Brand: Tempstar
SKU: 1177594-GEN
Price: 44.00 USD
Availability: InStock

SKU: 1177594-GEN Brand: Tempstar

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Overview

The OEM Tempstar Low Pressure Switch Assembly (part number 1177594) is a refrigerant-circuit safety on your T4H360GKD100 heat pump. It opens the control circuit when suction pressure drops too low — protecting the compressor from running on a low charge, a blocked metering device, or loss of refrigerant. When this switch fails or sticks open, the compressor won't start or locks out on a safety fault. This complete assembly includes the switch and factory leads for a direct OEM replacement.

Specifications

Spec	Value
Part Number	1177594
Type	Low Pressure Switch Assembly
Brand	Tempstar (ICP/Heil)
Function	Low-side refrigerant safety
Fits Model	T4H360GKD100
Fitment	OEM Direct Replacement

Compatibility

Specified for the Tempstar T4H360GKD100 and used across ICP-family heat pumps (Heil, Comfortmaker) that call for the 1177594 low pressure switch assembly. Verify the part number and connection style on your existing switch before ordering.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
Access — Remove the outdoor unit's service panel to reach the refrigerant line and switch.
Document — Photograph the switch leads and mounting before disconnecting.
Remove — Unplug the leads; if the switch threads onto a Schrader-style port, the system stays sealed during swap.
Install — Thread/clip the new switch in place and reconnect the leads per your photo.
Test — Restore power, confirm the compressor energizes, and verify no refrigerant leak at the fitting.

Signs You Need a Replacement

Compressor won't start despite proper charge
Unit locks out on a low-pressure safety
Switch fails continuity test when pressurized
Intermittent no-cool/no-heat calls

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. 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 Ass...

$44.00

Frequently Asked Questions

Does this Pressure Switch fit my Tempstar T4H360GKD100 — OEM 1177594 | Ships Today?

Yes. This is the factory-specified OEM pressure switch for the Tempstar T4H360GKD100 — OEM 1177594 | 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 T4H360GKD100 — OEM 1177594 | 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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