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L210-20F Furnace Primary Limit Switch (-40°F to 180°F) - For ICP Heil Tempstar Furnaces
L210-20F Primary Furnace Limit Switch
Key Features
- Critical safety switch designed to shut down the gas valve and burner circuit if the furnace heat exchanger exceeds maximum safe operating temperatures.
- Thermal setting calibrated to automatically open the circuit on temperature rise at 210°F and close (reset) at 190°F.
- Constructed with a highly responsive bimetallic disc enclosed in a temperature-resistant phenolic housing to prevent heat distortion.
- Features a flush-mount bracket and standard 1/4-inch male quick-connect spade terminals for immediate electrical integration.
Replaces / Cross-Reference Part Numbers
- L210-20F
- 34335001
- 34335-001
- HQ34335001TD
- 313408
- 338085-758
- 47-25349-06
Compatibility & Fitment
- Compatible with select residential gas furnaces manufactured by International Comfort Products (ICP), Heil, and Tempstar.
- Fits specific furnace models including: GDE050B12A2, GDE050B12G1, and GDE075F16A3.
When to Replace
- The furnace continuously short-cycles, shutting off the burner assembly well before reaching the target thermostat temperature.
- The furnace blower fan runs non-stop blowing cold air, indicating the system is locked out due to an open limit circuit.
- The main control board diagnostic LED continuously flashes an error code specifically for an open high-limit switch.
- A continuity test performed with a digital multimeter displays infinite resistance (an open circuit) while the switch is resting at room temperature.
Installation Tips
- Turn off the main electrical breaker to the furnace and ensure the unit is completely powered down before opening the service panels.
- Take a digital photograph of the existing wire connections to ensure the leads are routed back to the correct spade terminals.
- Remove the two hex screws securing the original switch to the heat exchanger bulkhead and carefully pull the component straight out.
- Align the new limit switch flush against the mounting surface and tighten the screws down evenly to prevent bending the mounting plate.
$6.60
Original: $18.86
-65%L210-20F Furnace Primary Limit Switch (-40°F to 180°F) - For ICP Heil Tempstar Furnaces—
$18.86
$6.60Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
L210-20F Primary Furnace Limit Switch
Key Features
- Critical safety switch designed to shut down the gas valve and burner circuit if the furnace heat exchanger exceeds maximum safe operating temperatures.
- Thermal setting calibrated to automatically open the circuit on temperature rise at 210°F and close (reset) at 190°F.
- Constructed with a highly responsive bimetallic disc enclosed in a temperature-resistant phenolic housing to prevent heat distortion.
- Features a flush-mount bracket and standard 1/4-inch male quick-connect spade terminals for immediate electrical integration.
Replaces / Cross-Reference Part Numbers
- L210-20F
- 34335001
- 34335-001
- HQ34335001TD
- 313408
- 338085-758
- 47-25349-06
Compatibility & Fitment
- Compatible with select residential gas furnaces manufactured by International Comfort Products (ICP), Heil, and Tempstar.
- Fits specific furnace models including: GDE050B12A2, GDE050B12G1, and GDE075F16A3.
When to Replace
- The furnace continuously short-cycles, shutting off the burner assembly well before reaching the target thermostat temperature.
- The furnace blower fan runs non-stop blowing cold air, indicating the system is locked out due to an open limit circuit.
- The main control board diagnostic LED continuously flashes an error code specifically for an open high-limit switch.
- A continuity test performed with a digital multimeter displays infinite resistance (an open circuit) while the switch is resting at room temperature.
Installation Tips
- Turn off the main electrical breaker to the furnace and ensure the unit is completely powered down before opening the service panels.
- Take a digital photograph of the existing wire connections to ensure the leads are routed back to the correct spade terminals.
- Remove the two hex screws securing the original switch to the heat exchanger bulkhead and carefully pull the component straight out.
- Align the new limit switch flush against the mounting surface and tighten the screws down evenly to prevent bending the mounting plate.
