3" HIGH LIMIT SWITCH L190-220F 3 High Limit Control Switches
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U.S. Duties/Taxes, if applicable, may be due at time of delivery.
Pickup available at 75 Blue Mountain St #3
Usually ready in 24 hours
Not sure this fits your furnace? Call us — we're happy to help
This 3-inch High Limit Switch (L190-220F) is a vital safety component designed for residential furnaces and HVAC heating systems. Functioning as a thermal protection device, this limit control monitors the heat exchanger or plenum temperature to prevent the appliance from overheating. If internal temperatures reach the designated safety threshold—specifically the 220°F limit—the switch automatically interrupts the circuit to the burner or heating element. Once the system cools to the 190°F reset point, it allows the unit to resume operation. This high-quality replacement part features a 3-inch insertion probe for precise temperature sensing, ensuring your heating system operates safely and efficiently. It is a common fix for furnaces that are short-cycling or shutting down prematurely due to airflow or temperature issues.
Our team is happy to help you verify compatibility before you order. We'll confirm it fits your specific furnace model.
1-778-759-9864Mon–Sat 8AM–5PM PT · Or email parts@bcfurnace.com
Compatible parts and related replacements
Yes, the 543-052 is a genuine OEM, or a factory replacement manufacturer approved part. We source all 3 Limit Switches from authorized distributors to ensure exact-fit compatibility. This 3 Limit Switch is backed by our 100% compatibility guarantee — if it doesn't fit your furnace, we'll make it right.
The easiest way is to match the part number (543-052) with your furnace model number. Visit the homepage and enter your model number in the search bar — our system will show all compatible 3 Limit Switches for your specific unit. You can also call our technicians at 1-778-759-9864 for free compatibility verification.
Most 3 Limit Switches including the 543-052 ship within 1–2 business days from our warehouse. We ship across Canada and the United States, and worldwide, with tracking on every order. For urgent furnace repairs, contact us at 1-778-759-9864 for expedited shipping options.
Yes! Local pickup is available at our Coquitlam, BC location: 75 Blue Mountain St #3. 3 Limit Switches orders are usually ready within 24 hours. Call us at 1-778-759-9864 to confirm the 543-052 is in stock before visiting.
Still not sure this is the right part? Call 1-778-759-9864 and we will check your model number with you.
The model number is on the rating plate inside the furnace door.
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