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Factory Authorized Parts™ HH18HA416 Furnace High Limit Safety Switch 180°F

Name: Factory Authorized Parts™ HH18HA416 Furnace High Limit Safety Switch 180°F
Brand: Carrier
SKU: 662441983443
Price: 35.00 USD
Availability: InStock

Low stock: 1 left

$35.00 USD

Sale Sold out

Shipping calculated at checkout.

Factory Authorized Parts™ - HH18HA416 Limit Switch

Critical Safety Protection: Protects your home by shutting down the gas valve if the furnace internal temperature exceeds 180°F.
OEM Factory Calibration: Unlike universal switches, this Factory Authorized Part ensures the exact "Open" and "Close" setpoints for your specific furnace model.
Easy Plug-and-Play Install: Features standard ¼” spade terminals for a quick electrical connection to the existing safety string.
Prevents Heat Exchanger Damage: By preventing overheating, this switch helps extend the life of your expensive furnace heat exchanger.
Durable Bi-Metal Construction: Designed for thousands of thermal cycles, providing years of reliable safety monitoring.

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Specifications

Product Details

Brand: Factory Authorized Parts™ (Carrier/Bryant/Payne)
Manufacturer: United Technologies
Part Number: HH18HA416
Weight: 0.15 lbs
Voltage: 24V (Control Circuit)
Open Temperature: 180°F
Reset Type: Automatic Reset
Mounting: Flange Mount / Insertion

description

Factory Authorized Parts™ HH18HA416 Furnace High Limit Safety Switch 180°F

The Critical Safety Sentinel of Your Furnace

The HH18HA416 is a genuine Factory Authorized Parts™ High Limit Switch, acting as the primary safety "gatekeeper" for your HVAC system. This component is the critical hardware link that prevents your furnace from reaching dangerous internal temperatures. If the airflow is restricted or the heat exchanger becomes too hot, this switch triggers an immediate system shutdown to prevent equipment damage and ensure household safety. As a genuine OEM replacement, it is calibrated to the exact thermal specifications required by Carrier, Bryant, and Payne equipment, ensuring the system operates within its engineered safety margins.

Key Features

Precision Thermal Protection: Specifically calibrated to open at 180°F, providing an essential fail-safe against furnace overheating and potential fire hazards.
Genuine OEM Reliability: Part number HH18HA416 is a Factory Authorized Part, ensuring the metallurgy of the bi-metal disc meets strict manufacturer tolerances for cycle life.
Direct Safety Integration: Engineered to communicate instantly with the furnace control board to kill the gas valve circuit when thermal limits are exceeded.
Resolved Nuisance Tripping: Replaces worn or "weak" switches that have drifted from their original temperature settings, preventing premature system lockouts and noise.
Universal Carrier Family Fit: Designed for a seamless mechanical fit across a wide range of gas furnace platforms without the need for drilling or bracket modification.

Product Details

Brand: Factory Authorized Parts™ (Carrier/Bryant/Payne)
Manufacturer: United Technologies
Part Number: HH18HA416
Weight: 0.15 lbs
Voltage: 24V (Control Circuit)
Open Temperature: 180°F
Reset Type: Automatic Reset
Mounting: Flange Mount / Insertion

🛠️ HVAC Depot Pro Tip

"Check Your Airflow First!" If you are replacing this switch because the old one "tripped" or "failed open," always inspect your air filter and evaporator coil before firing the unit back up. A limit switch often fails because it has been forced to cycle too many times due to restricted airflow. If the switch trips again immediately after installation, check for a blocked return air duct or a failing blower motor—the switch is likely doing its job and protecting you from a larger mechanical issue!

Cross-Reference

Legacy / Superseded Numbers: HH18HA411, HH18HA415
Drawing Numbers: 313362-402
Equivalent / Related Brands: Carrier, Bryant, Payne, Day & Night, White-Rodgers Thermal Disc

Model Compatibility

310A/310J Series (Suffixes: 024040, 036040, 036060, 048080, 060100)

58SB/58SC Series (Suffixes: 040-08, 040-12, 060-12, 080-16, 100-20, 120-22)

912S/915S Series (Suffixes: 30040S, 36060S, 42080S, 48080S, 60100S, 60120S)

PG8M Series (Suffixes: 045040, 045070, 070110)

Specification

Refund policy

Refund & Return Policy

Last Updated: June 2026

At HVAC Parts & Equipment Depot, customer satisfaction is important to us. This Refund & Return Policy explains how returns, exchanges, and refunds are handled for purchases made through TopHVACParts.com.

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

The item must be unused, uninstalled, and in its original condition.
The item must be returned in its original packaging.
Model numbers and serial numbers must match the original purchase records.
Proof of purchase or order confirmation is required.

Non-Returnable Items

The following items are not eligible for return or refund:

Installed or used parts.
Products showing signs of installation, modification, or damage caused after delivery.
Items missing original packaging.
Sale or clearance items.
Special-order or custom-order products.
Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

support@tophvacparts.com

Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

Refunds will be issued to the original payment method.
Processing typically takes 7–14 business days after approval.
Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

Our shipping error,
A defective product,
A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

Refund & Return Policy

Last Updated: June 2026

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

The item must be unused, uninstalled, and in its original condition.
The item must be returned in its original packaging.
Model numbers and serial numbers must match the original purchase records.
Proof of purchase or order confirmation is required.

Non-Returnable Items

The following items are not eligible for return or refund:

Installed or used parts.
Products showing signs of installation, modification, or damage caused after delivery.
Items missing original packaging.
Sale or clearance items.
Special-order or custom-order products.
Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

support@tophvacparts.com

Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

Refunds will be issued to the original payment method.
Processing typically takes 7–14 business days after approval.
Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

Our shipping error,
A defective product,
A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

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Happy Shouts From Our Thrilled Customers

William Bartlett

Cecil really saved me with troubleshooting tips over the phone. Thought I was going to have to replace the blower motor and ended up only needing a motor run capcitor. Thank you and God bless!

Verified Buyer

Riley Connolly

Cecil and Fidel were absolutely amazing and so helpful. We were happy they were open on Sunday, but was impressed with their knowledge and willingness to make sure we had everything we needed. If you need parts or service or install, I would recommend.

Verified Buyer

Cole Meger

Our AC went out during the hottest stretch of summer, and with a one-year-old at home, we were desperate for a quick fix. These guys came through big time — not only did they source the part faster than anyone else in the area, they also walked me through DIY troubleshooting while I waited. Trustworthy, knowledgeable, and run by a solid local family. As someone who owns rental properties nearby, I’ll be sourcing all my HVAC parts from them moving forward. Highly recommend!

Verified Buyer

Carl T. Droste

Had a power outage last night and during the 100 degree heat today noticed that the AC was not blowing any cold air. Pulled the capacitors to have them checked and also took video of the relay making noise even with the breaker was off. The proprietor and her staff were very friendly and helpful. She had the video analyzed and confirmed something was wrong. She checked one of the capacitors was a little low. Capacitor replacement is the biggest ticket item for HVAC repair. It is hundreds of dollars with the a capacitor only about $20.

Verified Buyer

Fuzzy Wuzzy

Cecil and his family have been a life saver. I walked in with very little knowledge on parts let alone how to repair my unit. All I had was my brother in FL who knows more than I do and Cecil at HVAC Depot. With 2 young kids at home I couldn't afford to wait for a HVAC tech. Cecil walked me through what I needed to know, even after hours when the shop closed. I successfully repaired the fan motor and replaced the capacitor. Thank you HVAC team for being totally awesome. Prices were amazing and I'm forever going to support this small family business. You and your family are what Texas is all about!!!

Verified Buyer

Linda Robinson

I called HVAC Depot and was absolutely blown away by the fast, courteous and exceptional service. They were very knowledgeable about explaining what they were doing and what had happened to the ac system. If you ever need a HVAC team they are best and they won’t hesitate by coming out and they won’t leave until you are happy with the service. Thank you so much for your excellent service. Kudos to you Michelle for your amazing customer service.

Verified Buyer

Paul Hamer

My AC went out in our home on Friday night. I went out and got the capacitor details and took them here first thing Saturday morning. Lady at the counter was friendly and had the capacitor I needed! When I got home, I installed the capacitor and AC is all good!!

Verified Buyer

Jeff Ledesma

Awesome support and had everything I needed for an older unit! Then helped me out with the DIY!! Air conditioning back up and running at 100%!!
Thanks for everything

Verified Buyer

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Frequently Asked Questions

Questions? We’ve got you covered

Can anyone buy from your store, or do I need to be a licensed contractor?

We are open to the public! Homeowners, landlords, and DIYers are all welcome—no license required.

What kinds of HVAC parts do you sell?

We carry blower motors, fan motors, capacitors, control boards, contactors, thermostats, filters, copper lines, refrigerants, and more.

Do you sell parts for specific brands like Trane, Goodman, or Lennox?

Yes, we stock OEM and compatible replacement parts for major brands including Trane, Goodman, Lennox, Carrier, Rheem, and others.

Can you help me find the right part for my system?

Absolutely! Bring in the part, model number, or a picture, and our team will help match you with the correct replacement.

Do you offer returns or exchanges on parts?

Yes, we accept returns or exchanges within a set time period—just make sure the item is unused and in original packaging. Ask for specific terms at the counter.

Do you provide technical support or installation services?

While we don't install, we can answer basic questions and refer you to trusted local HVAC technicians if needed.

Do you sell refrigerants to the public?

We sell certain refrigerants, but EPA regulations require certification for purchase of products like R-410A or R-22.

Do you ship parts, or is it in-store only?

We offer both! You can shop in person or call to arrange shipping if you're out of town.

Factory Authorized Parts™ HH18HA416 Furnace High Limit Safety Switch 180°F