Trane cnt03742 Hot Surface Ignition Control Module 24V

Product Description

The TRANE cnt03742 is a 24-volt universal hot surface ignition control module designed for use in gas-fired heating systems. It uses a silicon nitride igniter circuit to reliably light the main burner and incorporates variable timing sequences that allow it to adapt across a range of furnace applications. Licensed HVAC technicians install this control as part of routine furnace service or when diagnosing ignition failures. The module manages the ignition trial, flame sensing, and lockout logic that keeps the system operating safely and within manufacturer parameters.

This control module is suited for residential and light commercial gas furnace installations where a 24-volt hot surface ignition system is specified. Its universal design makes it a practical replacement option when servicing systems that require silicon nitride ignition control. The variable timing feature allows the technician to configure the module to match the original equipment timing sequence, reducing the need to stock multiple part-specific boards.

Key Features

• 24-volt control circuit compatible with standard low-voltage thermostat wiring
• Silicon nitride hot surface ignition support for reliable cold-weather starting
• Variable timing settings allow configuration to match original equipment sequences
• Universal design reduces inventory requirements for multi-brand service fleets
• Integrated flame sensing and lockout logic for safe burner operation

Compatibility

Designed as a universal OEM-style replacement for 24-volt silicon nitride hot surface ignition systems in residential and light commercial gas furnaces.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect power at the disconnect switch or breaker and turn off the gas supply before removing the existing control module. Follow the variable timing configuration instructions included with the module to match the replacement settings to the original equipment sequence. Work should comply with applicable local mechanical codes and the IFGC.

Technical Specifications

• Control Voltage: 24 volts
• Igniter Type: Silicon nitride hot surface
• Timing: Variable
• Application: Universal gas furnace ignition control

Standard Information

• Brand: TRANE
• Manufacturer Part Number: cnt03742