Trane furnace limit switch It senses the furnace temperature in the plenum, and tells the blower fan to turn on and off as needed, according to pre-set temperature settings. The Part number is CNT03670 (also 08-2719-00 & 311779) . com: Industrial & ScientificHelp others learn more about this product by uploading a video! Facing a Trane furnace limit switch error? Get expert answers on troubleshooting, including replacing the limit switch and resolving blower issues. Get your furnace back up and running with DIY instructions and OEM replacement parts. This is a Brand New Trane / American Standard Manuel Reset Disc Limit Switch rated at 180 Degrees (L180F) . 56 Trane SWT2124 Flame Rollout Limit Switch Get fast shipping on OEM Trane Furnace Limit Switch KIT13630 replacement parts from Repair Clinic. Find a Trane Furnace Limit Switch replacement at Repair Clinic with same-day shipping, 365-day returns, and a price match guarantee. SWT01611 is an official OEM Limit Switch - 170°F Open, 140°F Close for Trane HVAC equipment. Regular Get fast shipping on OEM Trane Furnace Limit Switch SWT01259 replacement parts from Repair Clinic. The limit switch is a safety switch that monitors the air passing over the heat exchanger Dec 26, 2014 · SWT01277 - Trane OEM Furnace 3" Replacement Limit Switch: Hvac Controls: Amazon. Good luck! Nov 25, 2013 · Gas and Oil Home Heating Furnaces - Trane XE90 High Limit after 5 min of use - Had a few hiccups with this system but was working fine last winter. Buy Trane SWT01277 Limit Switch for your Trane Furnace new from the technical experts. The Part number is C340056P15 and/or SWT01277. Follow our step-by-step instructions for safe troubleshooting or know when to call a professional technician. OEM Trane American Standard Furnace Limit Switch L300F-MR Replaces 1NT08L-1027 1NT08L-1027 Furnace Heater Gas Limit Switch Snap Disc Safety Temperature Repair Part SWT01277 is an official OEM Limit Switch (145°F Open, 115°F Close) for Trane HVAC equipment. The Part number is SWT02124 (also B330748P03 ). Pretty handy for a part that costs as little as $4. Discover expert insights on Trane upflow furnace "open inducer limit" issues. 365 day right part guaranteed return policy. It also analyzed reviews to verify trustworthiness. The diagnostic LED was flashing 4 times and indicating a "Thermal Protection Device Open". Thanks for looking and good luck! Dec 2, 2024 · Key Takeaways Purpose of the High Limit Switch: The high limit switch is a safety mechanism that prevents overheating by shutting down the furnace when temperatures exceed a predetermined limit. com. Thanks for looking and good luck!On Mar-28-12 at 16:06:36 PDT, seller added the following in Jun 3, 2025 · The high limit switch (also called the ‘temperature,’ ‘high temperature,’ and simply, ‘limit’ switch) is a key component in the safety system of every furnace. Good luck! Jan 16, 2009 · Gas and Oil Home Heating Furnaces - Newbie question: "Open Limit Switch" on Trane XV90 - Howdy. can anyone tell me why there is a limit switch here trane furnace rtu I'm new to the field and always wondered why it isn't located in furnace Dec 26, 2014 · Buy C340366P08 - Trane OEM Furnace 3" Replacement Limit Switch L230-30: Limit Switches - Amazon. Sep 20, 2025 · When the furnace runs too hot, the switch opens to stop the burners and blower, preventing damage or fire. 20 Free shipping OEM Intertherm Nordyne Miller Limit Switch L135-30F Replaces 626456 Learn how a furnace limit switch works and how you can tell if yours has an issue. The Part number is C340056P03 and/or SWT01271. Sep 26, 2025 · The Trane furnace “open high limit device” alert indicates the furnace’s safety limit switch has opened to prevent overheating. Thanks for looking and good luck!Partial List of Trane/American Standard Furnaces that use this Item:6 Sep 6, 2025 · This safety device is designed to shut down the furnace when it detects overheating. The Part number is C340056P13 and/or SWT01275. If the temperature rises beyond the set safety limit, the device opens the circuit, cutting off power to the burner and blower motor to prevent overheating and potential damage. com: Industrial & ScientificHelp others learn more about this product by uploading a video! Oct 17, 2025 · The Part number isSWT02124 (also B330748P03 ). In this article, I’ll tell you what to do if your furnace’s high limit switch is tripped. Get answers about inducer motors, pressure switches, and troubleshooting tips today! I have a Trane XR80 furnace, I was getting the high limit switch error message, we replaced the high limit switch and Oct 28, 2015 · Gas and Oil Home Heating Furnaces - Trane XL80 High limit code 4 even when high limit probe removed and jumpered - Hello- Any help would be greatly appreciated. The Part number is THT00744 (also 21C138085 & 60T23). It trips when the furnace overheats, cutting power to prevent damage. My trane xl80 furnace has been shutting off and showing code 4 high limit . pcgw xiid rxjx foxptr yanbcqis hhpzux zmtou bjtyj qsmurlm fmj bwumw bdlcwfa uecxvwut wodchh hiuzvq