S1-025-29041-004 York Coleman limit switch 3" L160-30F
S1-025-29041-004 York Coleman limit switch 3" L160-30F
The S1-02529041004 York Coleman Limit Switch (L160-30F) is a genuine OEM furnace safety control designed to protect heating systems from overheating conditions. This automatic-reset limit switch opens its contacts at 160°F and automatically resets when temperatures drop to 130°F. Featuring a 3-inch sensing arm and a back plate measuring 3-1/8" x 1-7/8", this control is commonly used in York, Coleman, Luxaire, and Evcon residential gas furnaces. The switch helps prevent heat exchanger damage and unsafe operating temperatures by interrupting the heating circuit during excessive heat conditions.
Cross-Reference
- S1-02529041004
- S1-025-29041-004
- 02529041004
- 025-29041-004
- 17533
- 0817R
- L160-30F
- 1NT17L-1875
Direct OEM
Yes – Genuine OEM York / Coleman replacement limit switch.
Compatible Brands
- York
- Coleman
- Luxaire
- Evcon
- Fraser-Johnston
- Guardian
Application
- Residential Gas Furnaces
- Forced-Air Heating Systems
- Furnace High-Limit Safety Circuit
- Heat Exchanger Over-Temperature Protection
Related Components
- Rollout Switches
- Flame Sensors
- Pressure Switches
- Igniters
- Furnace Control Boards
- Blower Motors
- Draft Inducer Motors
- Air Filters
Technician Notes
- Opens at 160°F (L160) and automatically resets at approximately 130°F (-30°F differential).
- Equipped with a 3-inch sensing arm for heat exchanger temperature monitoring.
- Sensor designation: 1NT17L-1875.
- Back plate dimensions: 3-1/8" x 1-7/8".
- Repeated limit trips usually indicate airflow restrictions or blower system issues rather than a defective limit switch.
- Always verify furnace temperature rise after replacement.
Common Symptoms of Failure
- Furnace shuts off before thermostat demand is satisfied.
- Burners cycle excessively.
- Furnace enters lockout condition.
- No-heat complaints due to open limit circuit.
- Intermittent heating operation.
- High-limit fault diagnostic codes.
Installation Tips
- Disconnect electrical power before servicing.
- Confirm replacement switch matches original temperature ratings and arm length.
- Transfer wires to the new switch one terminal at a time.
- Secure the limit switch firmly in the original mounting location.
- Restore power and test heating operation.
- Verify proper airflow and temperature rise across the heat exchanger.
Recommended Inspection Items
- Dirty air filter
- Plugged evaporator coil
- Restricted ductwork
- Closed supply registers
- Dirty blower wheel
- Weak blower motor
- Incorrect blower speed setting
- Cracked or damaged heat exchanger
- Venting restrictions
- Furnace temperature rise readings
Limit control L160F-30. Contacts open at 160F and automatic closes at 130F. 3" arm length. Back plate measures 3-1/8" x 1-7/8". Sensor size is 1NT17L-1875. Replaces Coleman part # 025-29041-004.
Also known as part number 17533 & 0817R.
