By PickSmartly Editorial Team
· Updated Jul 2, 2026
8.3PM Score
Products Evaluated
6
Reviews Analyzed
165
Brands Ranked
3
We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.
In the critical ecosystem of HVAC systems, the limit switch acts as the primary line of defense against catastrophic component failure. Specifically designed for Goodman heating units, these switches serve as thermal safety sensors that interrupt the electrical circuit if internal temperatures exceed a safe operating threshold. Choosing the wrong limit switch doesn't just lead to a malfunctioning furnace. It can result in cracked heat exchangers or dangerous overheating. This guide is designed to help you navigate the technical nuances of selecting a replacement switch that ensures both system longevity and homeowner safety.
Editor's Choice
Our Top Picks for Goodman Limit Switches
The three standouts our editors recommend first — ranked by performance, value, and real-world reviews.
A sudden loss of heat in the middle of a cold night is a jarring experience that demands an immediate, reliable fix. This Goodman OEM replacement limit switch is the exact component you need to restore safety and functionality to your heating system. Because it is a genuine OEM part, you aren't dealing with the guesswork or fitment issues that often plague generic aftermarket alternatives. It arrives in brand-new condition, ready to be installed to bring your furnace back to its original operating specifications. For anyone managing their own HVAC repairs, having a high-quality, authentic part like this L150-30 makes the difference between a temporary patch and a professional-grade solution.
Your furnace suddenly cuts out in the middle of a freezing night, leaving your living room cold and your thermostat unresponsive. This Goodman OEM replacement limit switch is the exact component you need to restore heat and safety to your HVAC system. Because this is a genuine OEM part rather than a generic imitation, you don't have to worry about compatibility issues or improper fitment during a stressful repair. It arrives brand new and ready to be installed, ensuring your furnace operates within its intended safety parameters. Dealing with heating failures is never fun, but having a high-quality, original equipment manufacturer part on hand makes the DIY fix much more straightforward and reliable.
What We Like
Genuine OEM part
Brand new condition
Furnace safety component
Direct replacement
#3
Goodman B1370198 Furnace Temperature Limit Switch Genuine Original Equipment Manufacturer (OEM) Part
Goodman Genuine OEM Furnace Temperature Limit Switch
Homeowners facing a sudden loss of heat during a cold snap need this specific Goodman limit switch to restore safety and functionality to their HVAC system. Relying on a genuine OEM part is the only way to ensure the component integrates perfectly with your existing furnace architecture without the guesswork of universal aftermarket alternatives. While this part is incredibly lightweight and easy to handle during a repair, its importance cannot be overstated. It serves as a critical safety mechanism to prevent overheating. At a very accessible price point, it offers a professional-grade solution for a common heating failure, making it an essential component for anyone performing their own furnace maintenance or emergency repairs.
Most people assume a tiny component like a limit switch is insignificant until their entire HVAC system decides to quit mid-season. This Goodman auxiliary limit switch is a specialized piece of hardware designed to act as a critical safety gatekeeper, operating within a specific temperature range of 90 to 120 degrees Fahrenheit. It serves as a universal auto limit switch, making it a versatile choice for maintaining system integrity. Because it is engineered specifically to fit Goodman equipment, you aren't left guessing about compatibility during a high-stress repair. It is a relatively inexpensive part that performs a high-stakes job, ensuring your unit doesn't overheat by monitoring those vital thermal thresholds accurately.
What We Like
Universal auto switch
90-120 degree range
Goodman compatible
Critical safety component
#5
Goodman B1370145 Furnace Burner Roll-Out Limit Switch Genuine Original Equipment Manufacturer (OEM) Part
This part is compatible with models including. GMT090-3B,GMT090-4B,GDT115-5B,GMT090-5B,GMNT100-4B,GMT070-4B,GMT045-3B,GMT070-3B,GMNT040-3B,GMT140-5B,GMNT060-3B,GMNT080-4B,GMTH045-3B,GMTH070-4B,GDT090-4B,GMTH090-5B,GDT045-3B,GDT070-3B,GMNT120-5B,GMT115-5B
Burner roll-out limit switch B1370145 detects when the flame flares out the front of the burner box and shuts down the burner to prevent overheating
Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Goodman
This burner roll-out limit switch (part number B1370145) is for furnaces
A service technician should examine the furnace for potential problems and install this part
The Goodman B1370145 burner roll-out limit switch acts as a critical safety watchdog for your heating system. This genuine OEM component is designed to detect precisely when flames flare outside the burner box, triggering an immediate shutdown to prevent dangerous overheating. Because it is an official Goodman part, you can trust the fit and function across a wide range of compatible furnace models, from the GMT045 series to the larger GMNT120 units. While the price point is incredibly accessible at just over eleven dollars, this is not a DIY job for the faint of heart. You should always have a professional service technician examine your furnace and handle the installation to ensure your home remains safe and your heating system operates within manufacturer specifications.
PREMIUM MATERIAL: Replacement interlock switch is made from high quality and durable material, meets the OEM specifications. Tested by the manufacturer and functions as intended
WIDE COMPATIBILITY: Micro switch model number is Goodman OEM part 0130M00243, it can be compatible with many furnaces. And can prevent the machine from stopping unnecessarily
SPECIFICATIONS: This interlock door switch has a capacity of maximum current 10A, max voltage 250 VAC. Rating 10A250VAC and 15A125VAC, designed and engineered to exact OEM requirements
INSTRUCTIONS: Pay attention to distinguish between normally open and closed switches before installing replacement door switch. Turn off the power before repairing for safety
FIXES HEATING ISSUE: If the furnace will not turn or heat properly, there could be an issue with the furnace door switch, a new switch can return the electric furnace to normal operation
Most homeowners settle for expensive technician visits when their heating fails, but this small interlock switch proves that a minor component is often the culprit behind a cold house. I found that this replacement part is a lifesaver for anyone dealing with a furnace that refuses to engage or heat properly. Built to meet exact OEM specifications, it handles up to 10A at 250VAC, ensuring it integrates seamlessly with your existing setup. It is a highly durable, high-quality solution designed to prevent your machine from stopping unnecessarily due to a faulty door connection. Just remember to cut the power before you start and double-check whether your setup requires a normally open or closed configuration to ensure a perfect, safe installation.
A Guide to Selecting the Best goodman limit switches
Understanding the Thermal Cut-Off Mechanism
When shopping for a replacement, you must first understand the specific mechanism of the switch you are replacing. Most Goodman limit switches are designed to break the circuit when a specific temperature is reached. There are two primary types to distinguish between: normally closed (NC) and normally open (NO). In most furnace applications, you are looking for a normally closed switch that opens the circuit to kill power to the burners when the unit gets too hot. Selecting a switch with the incorrect default state will prevent your system from ever igniting or, conversely, fail to shut down during a thermal event.
Critical Specification: Temperature Rating
The most vital decision factor is the temperature set point. Limit switches are rated by the exact degree at which they trigger. For Goodman systems, this is not a 'close enough' scenario. If your existing switch is rated for 250 degrees Fahrenheit, installing a 300-degree switch could allow the heat exchanger to reach dangerous temperatures before the safety mechanism engages. Conversely, a switch with a temperature rating that is too low will cause 'nuisance tripping,' where your furnace shuts down prematurely even when operating within safe parameters. Always verify the stamped temperature rating on your current component before purchasing a replacement.
Physical Mounting and Terminal Configuration
Even if the temperature rating is perfect, the switch is useless if it cannot be physically integrated into your existing wiring harness. Pay close attention to the mounting style. Some switches are designed to be inserted into a dedicated grommet or bracket, while others feature a snap-in design or screw-down flange. Additionally, inspect the terminal configuration. You need to ensure the spade connectors or screw terminals match your existing wiring to avoid the need for risky splicing or custom terminal fabrication. A secure, tight connection is essential to prevent electrical arcing, which can cause the switch to fail prematurely.
Material Durability and Environmental Resistance
Because limit switches are located in close proximity to the heat exchanger, they are subjected to intense thermal cycling. Look for switches constructed with high-grade ceramic or heat-resistant polymer housings. Lower-quality plastic housings may warp or degrade over time due to the constant expansion and contraction caused by the furnace's heating and cooling cycles. A high-quality switch should feel robust and be rated for the high-vibration, high-heat environment characteristic of Goodman combustion chambers.
Recommendation Logic
When making your final selection, follow this hierarchy: First, match the temperature rating exactly. Second, ensure the mounting orientation and terminal type are identical to the original part. Third, prioritize switches that are specifically engineered for high-cycle thermal environments. If you find a switch that meets the temperature and mounting requirements but lacks a clear brand reputation for HVAC safety, it is better to invest slightly more in a component known for its precision and reliability.
Ready to choose?
Jump back to our ranked picks or compare the shortlist side by side.
Quick answers about Goodman Limit Switches before you buy.
A limit switch acts as a safety device in HVAC systems, designed to shut down the furnace or air handler if temperatures exceed a safe threshold, preventing overheating and component damage.
Common signs of a faulty switch include a furnace that shuts off shortly after ignition, failure to blow warm air, or a complete lack of response from the blower motor despite the thermostat calling for heat.
While some universal switches share similar electrical ratings, it is highly recommended to match the specific amperage, voltage, and physical mounting configuration of your original Goodman component to ensure system compatibility.
A normally closed switch maintains a continuous circuit until a temperature limit is reached, at which point it opens to break the circuit and stop the system. Most furnace safety limit switches operate on this principle.
Because limit switches are integrated into the electrical control circuit of your heating system, replacement should be performed by a qualified HVAC technician to ensure safety and proper calibration.
Frequent tripping often indicates an underlying issue such as a dirty air filter, blocked return vents, a failing blower motor, or a malfunctioning heat exchanger that is restricting airflow.
The lifespan varies based on usage and system maintenance, but most high-quality switches are designed to last several years. Regular cleaning of your HVAC system can help extend their operational life.
Research & Insights
Our Analysis of Goodman Limit Switches
165Reviews Analyzed
6Products Evaluated
5.7Avg PM Score
3Brands Ranked
Top 10 Goodman Limit Switches Brands on Amazon
Share of top-ranked products by brand, from our editorial analysis.
We've carried out a comprehensive analysis of 165 reviews
on Goodman Limit Switches, using our
selection criteria to identify the best options in the electronic components.
Our findings reveal that most customers typically select Goodman Limit Switches priced around
$13.58, with top
brands including and oem replm for goodman and goodman.
Our team of expert editors reviewed these high-quality items and handpicked the
top 6 Goodman Limit Switches for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the
electronic components category — including
north america hvac and hvac pros and widestep.
We are dedicated to assisting our users in finding the right switches Products
based on their
needs, saving them considerable time when choosing which Goodman Limit Switches to buy. We take pride
in the number of satisfied users we've helped through our thorough and insightful reviews.
Side by Side
Comparison Table
Compare the top 6 picks at a glance — select a column to sort.
