Product Description
The GOODMAN 10728340 is a primary limit switch designed to protect gas furnaces from overheating conditions. It monitors heat exchanger temperatures and opens the control circuit when a preset threshold is reached, shutting down the burner to prevent equipment damage and unsafe operation. The switch operates across a temperature range of 70 to 220 degrees F and measures 3 inches in length. Licensed HVAC technicians install this switch as part of routine furnace service or when replacing a failed high-limit safety device. Manufactured by Thermodisc Inc, it is rated as an OEM-style accessory replacement component.
This primary limit switch is suited for residential gas furnace applications where high-limit protection is required. It fits into the limit switch circuit of the furnace control board and responds to abnormal temperature rises caused by restricted airflow, a dirty filter, or failed blower components. The 3-inch length accommodates standard furnace heat exchanger mounting positions. HVAC service technicians working on forced-air gas heating systems will find this switch appropriate for like-for-like replacement of the original primary limit device.
Key Features
- Operating temperature range of 70 to 220 degrees F for precise high-limit protection
- 3-inch length fits standard furnace limit switch mounting locations
- Functions as a primary limit switch to shut down burner on overtemp condition
- OEM-style replacement manufactured by Thermodisc Inc
- Single-unit pack quantity for straightforward single-unit service calls
Compatibility
Designed as an OEM-style replacement primary limit switch for residential gas furnaces requiring a 70 to 220 degrees F limit device with a 3-inch body length.
Installation Notes
Installation should be performed by a licensed HVAC technician. Always shut off power to the furnace at the disconnect switch and turn off the gas supply before removing or installing a limit switch. Follow applicable local codes and manufacturer wiring diagrams when reconnecting the limit switch leads to the control board circuit. After installation, restore power and verify proper furnace operation through a full heating cycle before returning the system to service.
Technical Specifications
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Temperature Range: 70 to 220 degrees F
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Length: 3 inches
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Switch Type: Primary Limit Switch
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Unit Type: Accessory
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Country of Origin: Mexico
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Vendor: Thermodisc Inc
Standard Information
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Brand: GOODMAN
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Manufacturer Part Number: 10728340
