What are the specs for this Pressure Switch?

The correct replacement for Tempstar model TSH542GKA100 — 24V | 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 TSH542GKA100 — 24V | 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 High & Low Pressure Switch Set for TSH542GKA100 — 24V | Ships Today

Name: Tempstar High & Low Pressure Switch Set for TSH542GKA100 — 24V | Ships Today
Brand: Tempstar
SKU: 1184656-GEN
Price: 34.00 USD
Availability: InStock

SKU: 1184656-GEN Brand: Tempstar

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Overview

This OEM refrigerant pressure switch set — high-pressure switch (part 1184656) and low-pressure switch (part 1184655) — protects the compressor in your Tempstar TSH542GKA100 by breaking the 24V control circuit when system pressure goes outside safe limits. The high switch opens on excessive discharge pressure (blocked condenser, failed fan, overcharge); the low switch opens on loss of charge or restricted flow. A failed or tripped switch is a frequent cause of a unit that won't start or short-cycles on a safety lockout.

Specifications

Spec	Value
High Switch Part Number	1184656
Low Switch Part Number	1184655
Type	High / Low Pressure Safety Switch
Brand	Tempstar (ICP/Heil)
Control Voltage	24V
Application	Compressor protection

Compatibility

Designed for the Tempstar TSH542GKA100 and matching ICP/Heil/Comfortmaker units using the same OEM high/low pressure switches. Confirm the switch fitting type (Schrader/auto-reset) and trip settings against your old switch before installing.

Installation Guide

Safety First — Disconnect power; verify zero voltage with a multimeter.
Access — Remove the service panel to reach the switches on the refrigerant lines.
Document — Photo the 24V wiring and which switch mounts on the high vs. low line.
Remove — Disconnect the leads and unthread the switch from its Schrader fitting (a small refrigerant burp is normal on quick-connect types).
Install — Thread on the new switch hand-tight plus snug, and reconnect the 24V leads per your photo.
Test — Restore power, start the system, and confirm normal operation with no nuisance trip.

Signs You Need a Replacement

Unit locks out on a pressure safety and won't restart
Compressor short-cycles with no obvious charge issue
Switch fails a continuity test at normal pressure
Corroded or physically damaged switch body or leads

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 High & Low Pressure Swi...

$34.00

Frequently Asked Questions

Does this Pressure Switch fit my Tempstar TSH542GKA100 — 24V | Ships Today?

Yes. This is the factory-specified OEM pressure switch for the Tempstar TSH542GKA100 — 24V | 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 TSH542GKA100 — 24V | 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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