Honeywell HK06NB124 Pressure Switch: Complete HVAC Professional’s Guide to Carrier Furnace Safety

The Ultimate Guide to the Honeywell HK06NB124 Pressure Switch for Furnaces

Looking for information about the Honeywell HK06NB124 pressure switch? You’re in the right place. As an HVAC professional, you know that having the right pressure switch is crucial for maintaining furnace safety and efficiency. The HK06NB124 is a widely used component in many Carrier and Bryant furnace systems, and understanding its specifications and applications can save you time and prevent headaches on service calls.

Let’s dive into everything you need to know about this essential furnace component, from compatibility to installation tips.

What Exactly Is the Honeywell HK06NB124 Pressure Switch?

The Honeywell HK06NB124 is a 1.81″ water column (WC) pressure switch designed primarily for Carrier and Bryant furnace systems. This pressure switch plays a critical safety role in the furnace operation by monitoring air pressure within the venting system.

When the furnace’s inducer motor creates sufficient negative pressure in the venting system, the switch closes, allowing the ignition sequence to continue. If proper venting isn’t detected, the switch remains open, preventing the furnace from operating under potentially dangerous conditions.

Technical Specifications of the Honeywell HK06NB124

• Static Pressure Rating: 1.81″ water column (WC)
• Dimensions: 4.5″ width × 3.5″ length × 2.3″ height
• Weight: Approximately 1 pound
• Manufacturer: Carrier (Honeywell manufactures for Carrier)
• Application: Residential furnace systems

Compatibility: Which Furnace Models Use the Honeywell HK06NB124?

The HK06NB124 pressure switch is compatible with numerous Carrier and Bryant furnace models. While the list is extensive, here’s a sampling of compatible models:

This is just a small selection of compatible models. When in doubt, you can verify compatibility by checking the model number of the existing pressure switch or consulting the furnace’s technical documentation.

Honeywell HK06NB124 vs. HK06NB123: What’s the Difference?

If you’re familiar with Carrier furnace parts, you might have encountered the HK06NB123 model as well. The HK06NB124 is essentially the newer replacement for the HK06NB123, with similar specifications and functionality. In most cases, the HK06NB124 can directly replace an HK06NB123 in compatible systems.

When to Replace Your Furnace’s Pressure Switch with a Honeywell HK06NB124

Knowing when to replace a pressure switch can save your clients from dangerous situations and unnecessary service calls. Here are the most common signs that a furnace pressure switch needs replacement:

• Furnace short-cycling: If the furnace starts but shuts down before completing a heating cycle
• Inducer motor runs but furnace won’t ignite: This often indicates a stuck or faulty pressure switch
• Error codes: Many Carrier furnaces will display specific error codes related to pressure switch problems
• Physical damage: Cracked housing, damaged diaphragm, or corroded electrical connections
• Failed continuity test: When tested with a multimeter, a properly functioning switch should show continuity when appropriate pressure is applied

Common Pressure Switch Problems the HK06NB124 Can Resolve

The Honeywell HK06NB124 can address several common furnace issues:

1. Furnace won’t initiate ignition sequence due to open pressure switch
2. Intermittent operation caused by pressure switch that’s on the verge of failure
3. Error codes indicating pressure switch failure or improper operation
4. Safety shutdowns related to venting pressure problems

How to Install the Honeywell HK06NB124 Pressure Switch

Installation of the HK06NB124 is relatively straightforward for experienced HVAC professionals. Here’s a basic installation process:

1. Safety first: Turn off power to the furnace at the breaker and verify power is off
2. Access the pressure switch: Remove the furnace access panel
3. Document the connections: Take photos or notes of the existing switch’s wiring and hose connections
4. Remove the old switch: Disconnect the electrical wires and pressure hoses from the old switch, then remove any mounting screws
5. Install the new HK06NB124: Mount the new pressure switch in the same location as the old one
6. Reconnect hoses and wires: Make sure all connections match your documentation from step 3
7. Restore power and test: Turn the power back on and run the furnace through a complete cycle to verify proper operation

Troubleshooting Tips After Installing a Honeywell HK06NB124

Even with a new pressure switch, you might encounter issues. Here are some troubleshooting tips:

• Check for blockages: Verify that the pressure hose and pressure ports are clear of debris
• Inspect venting: A blocked vent pipe can prevent proper pressure from reaching the switch
• Verify inducer operation: The inducer motor must create sufficient negative pressure for the switch to close
• Check electrical connections: Loose connections can cause intermittent operation
• Confirm pressure switch mounting: Improper mounting can affect switch operation

Where to Buy a Genuine Honeywell HK06NB124 Pressure Switch

Getting a genuine Honeywell HK06NB124 pressure switch is crucial for proper furnace operation and safety. While there are several sources for this part, I recommend purchasing from authorized dealers to ensure you’re getting a genuine component.

You can find the HK06NB124 at HVAC Direct for around $100, which is in line with the typical market price of $80-$100. While it might be tempting to save a few dollars with off-brand alternatives, the safety implications of using non-OEM parts in furnace safety systems make the genuine part worth the investment.

Pricing and Value Considerations for the Honeywell HK06NB124

When discussing pricing with clients, it’s important to emphasize the value of using genuine OEM parts like the Honeywell HK06NB124. While the part itself typically costs $80-$100, the total replacement cost including labor usually ranges from $150-$250 depending on your service rates.

Remember to emphasize that pressure switches are safety devices, and using the correct part is essential for proper furnace operation and, more importantly, for preventing potential safety hazards.

Frequently Asked Questions About the Honeywell HK06NB124

Is the Honeywell HK06NB124 the same as Carrier HK06NB124?

Yes, they are the same part. Honeywell manufactures this pressure switch for Carrier, and it’s often referred to by either name in the industry.

Can I clean and reuse a pressure switch instead of replacing it?

While you can sometimes clean a pressure switch that’s functioning intermittently due to debris, internal mechanical failures cannot be repaired. Since the HK06NB124 is a safety component, replacement is generally recommended over attempting repairs.

How long does a Honeywell HK06NB124 pressure switch typically last?

With proper installation and under normal operating conditions, these pressure switches typically last 5-10 years. However, environmental factors like humidity, dust, and operating conditions can affect lifespan.

Are there any common mistakes to avoid when installing the HK06NB124?

The most common installation mistakes include reversing the pressure hose connections, not securing electrical connections properly, and failing to properly mount the switch. Always document the original configuration before removing the old switch.

Does the Honeywell HK06NB124 come with a warranty?

When purchased from authorized dealers, the HK06NB124 typically includes a manufacturer’s warranty. The specific warranty terms may vary by supplier, so it’s worth checking at the time of purchase.

Conclusion: Why the Honeywell HK06NB124 Matters for Your HVAC Business

As an HVAC professional, having reliable access to quality components like the Honeywell HK06NB124 pressure switch is essential. Not only does it allow you to properly service a wide range of Carrier and Bryant furnace models, but it also helps ensure your clients’ systems operate safely and efficiently.

Remember that while the part itself is relatively inexpensive, the expertise you bring to diagnosing pressure switch issues and properly installing replacements is where your true value lies. By understanding the technical details and applications of components like the Honeywell HK06NB124, you position yourself as a knowledgeable professional who prioritizes safety and quality.

For your next furnace service call involving a Carrier or Bryant system, consider keeping a Honeywell HK06NB124 in your truck inventory—it might just save you and your client valuable time when it matters most.