{"title":"5 High Limit Control Switches","description":"","products":[{"product_id":"545-145","title":"545-145","description":"This 5-inch high limit switch is an essential safety component for forced-air heating systems and furnaces. Designed to monitor the internal temperature of the heat exchanger, this thermal limit control prevents the appliance from overheating by automatically breaking the electrical circuit if the temperature exceeds safe operating limits. Featuring a 145-degree Fahrenheit cut-out and a 30-degree differential for a reset at 115-degrees, this switch ensures reliable furnace performance and protects against equipment damage. If your HVAC system is experiencing short-cycling or the blower fan is running continuously, a replacement high-limit sensor may be necessary to restore proper heating cycles and home safety.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 5-inch probe depth\u003cbr\u003e\nDimensions: 5 inches\u003cbr\u003e\nApplication: Safety temperature monitoring for gas-fired furnaces, electric heating units, and air handlers.\u003cbr\u003e\nSpecifications: Cut-out Temperature: 145°F; Cut-in Temperature: 115°F; Temperature Differential: 30°F; Switch Configuration: Normally Closed (NC).","brand":"BCFurnace","offers":[{"title":"5\" HIGH LIMIT SWITCH L145-30F \/ 545-145","offer_id":47250957599005,"sku":null,"price":111.82,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L145-30F \/ 102857-04","offer_id":47250957631773,"sku":null,"price":111.82,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L145-30F \/ 71W44","offer_id":47250957664541,"sku":null,"price":111.82,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L145-30F \/ 71W4401","offer_id":47250957730077,"sku":null,"price":111.82,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L145-30F \/ L145-30F..","offer_id":47250957762845,"sku":null,"price":111.82,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/317741d288a84c6f94d856d63c17e6b5.webp?v=1773957003"},{"product_id":"545-175","title":"545-175","description":"Ensure the safety and efficiency of your heating system with this premium 5-inch high limit control switch. Designed as a critical safety mechanism for HVAC units and furnaces, this thermal limit switch monitors the internal temperature of your appliance to prevent overheating and potential damage to the heat exchanger. It features a fixed temperature setting that automatically interrupts the electrical circuit if the unit exceeds safe operating levels. This specific L175-30F model is engineered to open at 175 degrees Fahrenheit and reset once the temperature drops by 30 degrees, providing reliable protection and peace of mind. Ideal for professional HVAC repairs and routine maintenance, this durable switch is a standard replacement part for residential and commercial forced-air heating systems.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 5-inch insertion length\u003cbr\u003e\nDimensions: 5 in\u003cbr\u003e\nApplication: Commonly used in residential and commercial gas furnaces, air handlers, and HVAC equipment as a primary safety sensor to prevent equipment overheating.\u003cbr\u003e\nSpecifications: Open Temperature: 175°F; Differential: 30°F (Resets at 145°F); Type: Automatic Reset; Probe Length: 5 inches.","brand":"BCFurnace","offers":[{"title":"5\" ALLIED HIGH LIMIT SWITCH L175-30F \/ 545-175","offer_id":47251056001309,"sku":null,"price":115.14,"currency_code":"CAD","in_stock":true},{"title":"5\" ALLIED HIGH LIMIT SWITCH L175-30F \/ 102857-07","offer_id":47251056066845,"sku":null,"price":115.14,"currency_code":"CAD","in_stock":true},{"title":"5\" ALLIED HIGH LIMIT SWITCH L175-30F \/ 73W20","offer_id":47251056034077,"sku":null,"price":115.14,"currency_code":"CAD","in_stock":true},{"title":"5\" ALLIED HIGH LIMIT SWITCH L175-30F \/ L175-30F..","offer_id":47251056099613,"sku":null,"price":115.14,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/cef5bc7c525d4d32b7e46fcbc1367b4d.webp?v=1773957370"},{"product_id":"545-165","title":"545-165","description":"Ensure the safety and efficiency of your heating system with this premium 5-inch high limit control switch. Designed as a critical safety component for forced-air furnaces and HVAC units, this thermal limit switch prevents equipment damage and potential hazards by monitoring internal temperatures. The switch is engineered to automatically open the electrical circuit when the air temperature reaches a 165°F threshold, effectively shutting down the burner to prevent overheating. Once the temperature cools down by a 30°F differential, the switch resets to restore normal operation. This reliable replacement part is essential for maintaining proper airflow safety and protecting your furnace's heat exchanger from excessive thermal stress. It is a common fix for heating systems that are short-cycling or failing to stay lit due to a faulty safety sensor.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 5-inch insertion depth\u003cbr\u003e\nDimensions: 5 inches\u003cbr\u003e\nApplication: Commonly used in residential and commercial gas furnaces, electric heaters, and forced-air HVAC systems to monitor plenum temperature and provide over-temperature protection.\u003cbr\u003e\nSpecifications: Cut-out Temperature: 165°F (L165); Differential\/Reset: 30°F (30F); Switch Configuration: Normally Closed (NC); Reset Type: Automatic; Mounting: 5-inch probe\/insertion style.","brand":"BCFurnace","offers":[{"title":"5\" HIGH LIMIT SWITCH L165-30F \/ 545-165","offer_id":47251056492829,"sku":null,"price":80.5,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L165-30F \/ 102857-08","offer_id":47251056558365,"sku":null,"price":80.5,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L165-30F \/ 75W15","offer_id":47251056525597,"sku":null,"price":80.5,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L165-30F \/ 75W1501","offer_id":47251056591133,"sku":null,"price":80.5,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L165-30F \/ L165-30F.","offer_id":47251056623901,"sku":null,"price":80.5,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/5d894c8b425e489d9e6c9d22a75e632a.webp?v=1773967104"},{"product_id":"545-135","title":"545-135","description":"This 5-inch furnace high limit switch is a critical safety component for residential heating systems and forced-air gas furnaces. Designed to prevent equipment damage and ensure safe operation, this thermal control switch monitors the temperature of the heat exchanger. It acts as a fail-safe by automatically interrupting power to the heating cycle if the internal temperature exceeds safe limits. Featuring an automatic reset functionality, it restores operation once the unit has cooled to a safe level. This durable replacement part is essential for HVAC maintenance, helping to protect your furnace from overheating and potential fire hazards while maintaining consistent airflow safety.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 5-inch insertion depth\u003cbr\u003e\nDimensions: 5 in\u003cbr\u003e\nApplication: Used in forced-air gas furnaces and HVAC systems to monitor heat exchanger temperatures and provide overheat protection.\u003cbr\u003e\nSpecifications: Opening temperature: 135°F; Reset differential: 30°F; Automatic reset; 5-inch probe length; SPST (Single Pole Single Throw) configuration.","brand":"BCFurnace","offers":[{"title":"5\" HIGH LIMIT SWITCH L135-30F \/ 545-135","offer_id":47251056656669,"sku":null,"price":117.09,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L135-30F \/ 102857-01","offer_id":47251056722205,"sku":null,"price":117.09,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L135-30F \/ 71W41","offer_id":47251056689437,"sku":null,"price":117.09,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L135-30F \/ L135-30F..","offer_id":47251056754973,"sku":null,"price":117.09,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/a8078fc17f31487da33fa7014ad6abe9.webp?v=1773957417"},{"product_id":"545-140","title":"545-140","description":"The 5-inch High Limit Switch is a critical safety component designed for residential gas furnaces and forced-air heating systems. This thermal limit control monitors the internal temperature of the furnace plenum to prevent overheating and ensure safe operation. If the air temperature exceeds the safe limit of 140°F, the switch automatically breaks the electrical circuit to shut down the burner or heating element. Once the system cools by a 30°F differential, the switch resets to allow normal heating cycles to resume. Featuring a 5-inch probe for accurate temperature detection, this high-limit sensor is an essential replacement part for maintaining HVAC system longevity and home safety. Ideal for homeowners and technicians performing furnace repairs or preventative maintenance.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 5-inch insertion probe\u003cbr\u003e\nDimensions: 5 inches\u003cbr\u003e\nApplication: Used in forced-air furnaces and HVAC systems as a primary safety limit to detect and prevent overheating conditions.\u003cbr\u003e\nSpecifications: Cut-out Temperature: 140°F; Cut-in\/Differential: 30°F; Probe Length: 5 inches; Configuration: Normally Closed (NC).","brand":"BCFurnace","offers":[{"title":"5\" HIGH LIMIT SWITCH L140-30F \/ 545-140","offer_id":47251056918813,"sku":null,"price":103.86,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L140-30F \/ 102857-03","offer_id":47251056984349,"sku":null,"price":103.86,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L140-30F \/ 71W43","offer_id":47251056951581,"sku":null,"price":103.86,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L140-30F \/ L140-30F","offer_id":47251057017117,"sku":null,"price":103.86,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/19d20c81ff9e4d0f8fd0b705c71889bd.webp?v=1773957418"},{"product_id":"545-150","title":"545-150","description":"The 5-inch High Limit Switch is a critical safety component designed for HVAC systems and forced-air furnaces. This thermal limit control monitors the internal temperature of the heat exchanger to protect your heating system from overheating. Engineered as a normally closed switch, it automatically opens the electrical circuit when temperatures reach the 150°F threshold, effectively shutting down the burner or heating element to prevent equipment damage or fire hazards. Featuring a 30°F differential, the switch resets once the system cools to a safe operating temperature. This high-quality replacement sensor is essential for maintaining the safety and efficiency of residential and commercial heating units.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 5-inch insertion length\u003cbr\u003e\nDimensions: 5 inches\u003cbr\u003e\nApplication: Commonly used in gas furnaces, electric air handlers, and forced-air heating systems to monitor heat exchanger temperatures and provide over-temperature protection.\u003cbr\u003e\nSpecifications: Cut-out Temperature: 150°F; Cut-in Temperature: 120°F (30°F differential); Reset Type: Automatic; Configuration: Normally Closed (NC).","brand":"BCFurnace","offers":[{"title":"5\" HIGH LIMIT SWITCH L150-30F \/ 545-150","offer_id":47251071336733,"sku":null,"price":119.02,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L150-30F \/ 102857-05","offer_id":47251071402269,"sku":null,"price":119.02,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L150-30F \/ 73W18","offer_id":47251071369501,"sku":null,"price":119.02,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L150-30F \/ 73W1801","offer_id":47251071435037,"sku":null,"price":119.02,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L150-30F \/ L150-30F","offer_id":47251071467805,"sku":null,"price":119.02,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/9dc5a72a9f1d49bfaf6a84414cf4baa5.webp?v=1773957420"},{"product_id":"545-136","title":"545-136","description":"This high-limit service switch is an essential safety component for residential gas furnaces and HVAC heating systems. Designed to monitor internal temperatures, this thermal limit control automatically interrupts the heating cycle if the appliance exceeds safe operating temperatures, preventing damage to the heat exchanger and ensuring home safety. Featuring a 6-inch probe and a broad temperature adjustment range, it is a versatile replacement part for various air handlers and forced-air heating units. This pack of high-quality limit switches is ideal for HVAC professionals and maintenance technicians looking to restore reliable thermal protection to a heating system.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 6-inch probe length\u003cbr\u003e\nDimensions: 6 in\u003cbr\u003e\nApplication: Used in residential gas furnaces, HVAC systems, and air handlers to provide thermal safety and prevent overheating.\u003cbr\u003e\nSpecifications: Temperature Range: 30°F to 220°F; Configuration: Pack of 5 service switches; Probe Length: 6 inches.","brand":"BCFurnace","offers":[{"title":"LIMIT SWITCH SERVICE 30 TO 220 DEGF 6 IN LG \/ 545-136","offer_id":47251259851037,"sku":null,"price":68.26,"currency_code":"CAD","in_stock":true},{"title":"LIMIT SWITCH SERVICE 30 TO 220 DEGF 6 IN LG \/ 1370914S","offer_id":47251259883805,"sku":null,"price":68.26,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/fdf5c6885da94ba8a8e87203fad70123.webp?v=1773958004"},{"product_id":"545-155","title":"545-155","description":"This 5-inch high limit control switch is a vital safety component for residential furnaces and forced-air heating systems. Engineered to prevent equipment overheating, this thermal sensor monitors the heat exchanger's temperature and automatically cuts power to the heating element or burner if the temperature exceeds safe operating limits. Featuring a 155°F opening point and a 30°F reset differential, it ensures reliable performance and protects your HVAC system from potential heat-related damage. Whether you are performing routine maintenance or repairing a malfunctioning heater, this high-limit switch provides the precise temperature regulation needed for a safe and efficient home environment.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 5-inch probe length\u003cbr\u003e\nDimensions: 5 in\u003cbr\u003e\nApplication: Used in forced-air furnaces, residential heating systems, and HVAC units to monitor internal temperatures and provide automatic safety shut-off.\u003cbr\u003e\nSpecifications: Cut-out temperature: 155°F; Differential\/Reset: 30°F; Automatic reset functionality; High-temperature safety limit.","brand":"BCFurnace","offers":[{"title":"5\" HIGH LIMIT SWITCH L155-30F \/ 545-155","offer_id":47251336102173,"sku":null,"price":114.48,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L155-30F \/ 102857-06","offer_id":47251336167709,"sku":null,"price":114.48,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L155-30F \/ 73W19","offer_id":47251336134941,"sku":null,"price":114.48,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L155-30F \/ 73W1901","offer_id":47251336200477,"sku":null,"price":114.48,"currency_code":"CAD","in_stock":true},{"title":"5\" HIGH LIMIT SWITCH L155-30F \/ L155-30F..","offer_id":47251336233245,"sku":null,"price":114.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/71b896450ffc4aa2b846b47ba0ada552.webp?v=1773958267"},{"product_id":"120-679","title":"120-679","description":"This pack of five high limit control switches is a critical safety component designed for residential HVAC systems and forced-air furnaces. These thermal cutout switches monitor the internal temperature of your heating equipment to prevent hazardous overheating. Engineered for reliability, the switch automatically opens the electrical circuit when the temperature reaches a threshold of 240°F, effectively shutting down the burner or heating element. Once the system has safely cooled down to 155°F, the switch closes to allow for a reset and continued operation. Ideal for furnace repair and routine maintenance, these high-quality sensors ensure your heating system operates within safe thermal parameters, protecting both the appliance and your home from heat-related damage.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: Compact\u003cbr\u003e\nApplication: Used in forced-air furnaces, residential heating systems, and mobile home HVAC units to monitor heat exchanger temperatures and provide over-temperature protection.\u003cbr\u003e\nSpecifications: Open Temperature: 240°F; Close Temperature: 155°F; Quantity: Pack of 5 switches; Function: Normally Closed (NC) thermal safety limit.","brand":"BCFurnace","offers":[{"title":"YORK\/ETC TEMP. CONTROL 240 OPEN,155 CLOSE \/ 120-679","offer_id":50216934441245,"sku":null,"price":140.65,"currency_code":"CAD","in_stock":true},{"title":"YORK\/ETC TEMP. CONTROL 240 OPEN,155 CLOSE \/ S1-02531927000","offer_id":50216934474013,"sku":null,"price":140.65,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/3e88e8c4d4c44a2eb81f22c6b75aa778.webp?v=1773964597"},{"product_id":"120-783","title":"120-783","description":"This premium 5-inch insert high limit control switch is a vital safety component for residential and commercial heating systems. Engineered as an L240F-30 thermal limit, this thermostat monitors internal furnace temperatures to prevent hazardous overheating. When the system reaches the critical 240°F threshold, the switch automatically opens to interrupt the heating cycle, protecting the heat exchanger and surrounding components from damage. Once the temperature cools by its 30°F differential, it resets to restore normal operation. Ideal for HVAC maintenance and furnace repair, this durable limit control ensures your heating equipment operates within safe temperature parameters.\u003cbr\u003e\nType: High Limit Control Switch\u003cbr\u003e\nSize: 5-inch probe depth\u003cbr\u003e\nDimensions: 5 inches\u003cbr\u003e\nApplication: Gas furnaces, electric heating units, and HVAC air handlers requiring a thermal safety cut-off.\u003cbr\u003e\nSpecifications: Cut-out temperature: 240°F; Differential: 30°F (Resets at 210°F); Configuration: Normally Closed; Mounting: Flange mount with 5-inch probe insert.","brand":"BCFurnace","offers":[{"title":"Limit Switch\/Thermostat, 5\" Insert, L240F-30 \/ 120-783","offer_id":50341992431901,"sku":null,"price":136.29,"currency_code":"CAD","in_stock":true},{"title":"Limit Switch\/Thermostat, 5\" Insert, L240F-30 \/ S1-02532694000","offer_id":50341992464669,"sku":null,"price":136.29,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/d055eebc5ddf4e05873976ae4b216b63.webp?v=1773966270"},{"product_id":"121-160","title":"121-160","description":"This premium HVAC fan and high-limit control switch is a vital safety and operational component for forced-air heating systems. Engineered to monitor internal furnace temperatures, this dual-function controller regulates the blower fan's activation and provides critical overheat protection. The 5-inch probe accurately senses air temperature, ensuring the system operates within safe parameters by automatically shutting down the heating element if temperatures reach the 230°F limit. Ideal for furnace repair and routine HVAC maintenance, this switch helps prevent heat exchanger damage and ensures consistent airflow and home comfort. If your furnace is short-cycling or the blower fan fails to engage, replacing the fan limit control is a common solution to restore reliable heating performance.\u003cbr\u003e\nType: Fan and High Limit Control Switch\u003cbr\u003e\nSize: 5-inch insertion depth\u003cbr\u003e\nDimensions: 5 inches (probe length)\u003cbr\u003e\nApplication: Forced-air furnaces, residential heating systems, and commercial HVAC units requiring a high-temperature safety cutoff and fan regulation.\u003cbr\u003e\nSpecifications: High-limit temperature setting: 230°F; Control type: Combined Fan and Limit; Probe length: 5 inches; Function: Safety cutout and blower motor activation.","brand":"BCFurnace","offers":[{"title":"CONTROL,FAN \u0026amp; LIMIT 230 DEG F 5 INCH \/ 121-160","offer_id":50217037922589,"sku":null,"price":883.22,"currency_code":"CAD","in_stock":true},{"title":"CONTROL,FAN \u0026amp; LIMIT 230 DEG F 5 INCH \/ S1-02638676000","offer_id":50217037955357,"sku":null,"price":883.22,"currency_code":"CAD","in_stock":true}]}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/collections\/IMG-1370914S-removebg-preview_8260a215-4a4a-4de9-aea3-623e2d87797c.png?v=1701983603","url":"https:\/\/bcfurnace.myshopify.com\/collections\/5-high-limit-control-switches.oembed","provider":"BCFurnace","version":"1.0","type":"link"}