Goodman bt1243745 Secondary Thermal Limit Switch

Product Description

The Goodman bt1243745 is a secondary thermal limit switch designed to protect heating equipment from overtemperature conditions. This safety device monitors heat levels within the system and interrupts operation when temperatures exceed safe thresholds, preventing damage to components and reducing fire risk. It is a direct accessory-class component installed by licensed HVAC technicians during routine service or system repair. The bt1243745 is a factory-matched replacement that fits within the control circuit of compatible Goodman heating systems.

Secondary thermal limit switches like the bt1243745 are typically found in gas furnaces and air handlers where a backup overheat protection device is required in addition to the primary limit. This part is suited for residential heating applications and is categorized as an accessory-class switch. Technicians replace this component when the original limit has failed open, trips repeatedly, or shows signs of heat damage during a service call.

Key Features

• Secondary thermal overload protection interrupts circuit on overtemperature condition
• Accessory-class switch designed for direct installation in compatible heating systems
• Single-pack quantity for individual unit service and repair
• Manufactured to OEM specifications as a replacement component

Compatibility

Designed as an OEM-style replacement secondary thermal limit switch for compatible Goodman heating systems. Verify fitment against the installed unit model number and wiring diagram before ordering.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect all power to the furnace or air handler at the breaker and verify voltage is absent before removing the existing limit switch. Follow the unit wiring diagram for correct terminal connections and confirm the replacement switch is seated and secured before restoring power. Refer to local mechanical codes and the equipment manufacturer service manual for procedure guidance.

Technical Specifications

• Component Type: Secondary Thermal Limit Switch
• Unit Type: Accessory
• Pack Quantity: 1
• Country of Origin: China

Standard Information

• Brand: Goodman
• Manufacturer Part Number: bt1243745