![Troubleshooting the Fan Limit Control Switch on a Furnace, Temperature Settings, How it Works! - YouTube Troubleshooting the Fan Limit Control Switch on a Furnace, Temperature Settings, How it Works! - YouTube](https://i.ytimg.com/vi/Pyz9MxgHn5k/maxresdefault.jpg)
Troubleshooting the Fan Limit Control Switch on a Furnace, Temperature Settings, How it Works! - YouTube
![Honeywell 47-20545-92 Fan and Limit Switch, 3 inch W x 4-9/32 inch H | Buy Fan & Limit Controls & More at Southern Pipe & Supply Honeywell 47-20545-92 Fan and Limit Switch, 3 inch W x 4-9/32 inch H | Buy Fan & Limit Controls & More at Southern Pipe & Supply](https://www.southernpipe.com/ASSETS/IMAGES/ITEMS/DETAIL_PAGE/RH472054592.jpg)
Honeywell 47-20545-92 Fan and Limit Switch, 3 inch W x 4-9/32 inch H | Buy Fan & Limit Controls & More at Southern Pipe & Supply
![L4064B2236 - Resideo L4064B2236 - Fan and Limit Controller w/ 125 F Fan on/100 F Fan off, 200 F High Limit, 8" Insertion L4064B2236 - Resideo L4064B2236 - Fan and Limit Controller w/ 125 F Fan on/100 F Fan off, 200 F High Limit, 8" Insertion](https://www.supplyhouse.com/images/products/zoom/l4064b2236-1.jpg)
L4064B2236 - Resideo L4064B2236 - Fan and Limit Controller w/ 125 F Fan on/100 F Fan off, 200 F High Limit, 8" Insertion
![I have no experience with these old limit switches. How do I properly adjust it? The fan will not turn off after a heating or cooling cycle. The problem started after my I have no experience with these old limit switches. How do I properly adjust it? The fan will not turn off after a heating or cooling cycle. The problem started after my](https://preview.redd.it/i-have-no-experience-with-these-old-limit-switches-how-do-i-v0-ytf3gg1kzuv91.jpg?auto=webp&s=ac37f404a882c672b811690c79c93159458d7b5a)