Product Description
The Goodman b1370195 is a primary limit switch rated from 30 to 300 degrees F, designed to protect gas furnace heat exchangers and burner assemblies from overtemperature conditions. When supply air temperature exceeds the set point, the switch opens the control circuit and shuts down the burner, preventing heat exchanger damage and potential safety hazards. Manufactured by Thermodisc Inc, this switch is an OEM accessory replacement used in residential and light commercial gas furnace applications. Licensed HVAC technicians install this part during routine limit-switch replacement or as part of a no-heat diagnostic repair.
This primary limit switch is suited for gas furnace systems where the existing limit switch has failed open, failed closed, or is triggering nuisance trips due to age or drift. It fits into the furnace cabinet in the air-stream path near the heat exchanger, where it monitors supply air temperature continuously during burner operation. It ships in pack multiples of 2, making it practical for stocking in a service van or supply room for common furnace service calls.
Key Features
- Operating range of 30 to 300 degrees F for primary overtemperature protection
- Compact form factor at 2 inches depth, 1.51 inches height, and approximately 1.97 inches width
- Lightweight at 0.0639 pounds for easy handling in tight furnace cabinet spaces
- OEM accessory classification for direct replacement service use
- Manufactured by Thermodisc Inc, a recognized supplier of thermal cutoff and limit devices
- Available in pack multiples of 2 for van-stock efficiency
Compatibility
Designed as an OEM-style replacement primary limit switch for residential and light commercial gas furnace systems requiring a 300 degrees F rated limit device.
Installation Notes
This part is installed by licensed HVAC technicians. Always shut off power to the furnace at the disconnect switch and turn off the gas supply before replacing a limit switch. Verify the root cause of limit tripping before replacing the switch, as a failed limit switch may be a symptom of restricted airflow, dirty filters, or blocked flues. Follow applicable local mechanical codes and the furnace manufacturer service documentation during installation.
Technical Specifications
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Temperature Range: 30 to 300 degrees F
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Unit Depth: 2 inches
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Unit Height: 1.51 inches
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Unit Width: 1.97 inches
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Weight: 0.0639 pounds
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Country of Origin: Mexico
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Pack Multiple Quantity: 2
Standard Information
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Brand: Goodman
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Manufacturer Part Number: b1370195
