High Limit Control

High Limit Control – OEM Part 80145 | Replacement for Breckwell, US Stove, Johnson & Vogelzang FurnacesProtect your furnace from overheating and maintain efficient airflow with the OEM 80145 High Limit Control. Manufactured by Honeywell and trusted by Breckwell, US Stove, Johnson, and Vogelzang furnaces, this high-limit/fan control switch monitors system temperature, activates blowers, and ensures safe operation in wood and coal heating systems.Key Features:OEM Replacement – Direct fit for Breckwell, US Stove, Johnson & Vogelzang modelsAdjustable Control – Field-adjustable fan and high-limit settings for flexible operation3 Wiring Options – Includes push-in, 1/4″ female flag connectors, and auxiliary screw terminalsDurable Construction – 5″ insertion element for accurate temperature sensing and long service lifeSpecifications:Part Number: 80145Replaces: AC-1339Sensor Length: 5″ insertion elementApplication: High-limit and fan control switchOEM Brand: Honeywell / US Stove CompanyTerminal Options: Push-in for stripped wire, 1/4″ female connectors, auxiliary screw terminalsCompatible Models:Breckwell Furnaces:SF74780145L4064B2228Johnson Furnaces:J7300J7300CJ9000J9900US Stove Furnaces:80145Ashley 1602RClayton 1600G, 1600M, 1602M, 1800G, 1802GExterior 1600EF, 1660EFEHotblast 1300, 1400, 1500Vogelzang Furnaces:1500 (2002–2012)2500 (2002–2012)80145May fit additional models—always confirm compatibility with your owner’s manual.Why Choose the OEM 80145 High Limit Control?A failing or incorrect high limit control can compromise furnace safety and lead to overheating. The 80145 control restores safe, efficient blower operation with Honeywell reliability and OEM-grade design. Built for performance and longevity, this replacement ensures your heating system operates at peak safety standards.Order your OEM 80145 High Limit Control today and protect your furnace with a trusted, factory-fit solution!A universal fan and limit control for forced-air furnaces, managing the blower fan’s on/off cycles based on plenum temperature (using a bimetal sensor) while also providing a critical high-limit safety switch to prevent overheating by shutting down the burner if temperatures get too high. It features adjustable settings for fan-on, fan-off, and high-limit temperatures, simple push-in wire terminals for easy installation, and often includes a manual switch for continuous fan operation, making it a common replacement part for various heating systems. Key Functions:Fan Control: Turns the blower fan on as the furnace heats up and off as it cools down to distribute warm air.High Limit Control: Trips the burner off if the plenum gets dangerously hot (e.g., above 180-200°F), preventing damage and fire.Manual Override: A manual switch allows the fan to run constantly, even when the heat isn’t on. Features & Specifications:Bimetal Sensor: A helical bimetal strip senses plenum temperature and physically moves the switches.Adjustable Settings: Dials for fan-on, fan-off, and high-limit temperatures (e.g., 65-215°F Fan-On, 50-200°F Fan-Off, 100-250°F High Limit).Installation: Push-in terminals and receptacles for fast wiring; comes with adapters for replacing other brands.Models Vary: Different models (e.g., L4064B2210, L4064B2236) have different insertion lengths (like 8″, 11.5″) for the sensing element. How it Works:Heating Up: As the furnace heats, the plenum temperature rises, causing the bimetal sensor to bend.Fan Turns On: When the temperature hits the “Fan-On” setting (e.g., 120°F), the fan switch closes, starting the blower.Burner On/Off: The fan helps move heat; if the burner runs too hot (e.g., past 180°F), the high limit switch opens, shutting off the gas, say experts at Jackson Systems and Wood Heating Solutions.Cool Down: When the thermostat is satisfied, the burner shuts off, but the fan continues to run until the plenum cools to the “Fan-Off” setting (e.g., 90°F).