Trane CNT3776 - OEM Replacement Furnace Control Board

24V 3TFI Ignition Module

Trane CNT3776 OEM Replacement Furnace Control Board 24V 3TFI Ignition Module

The Trane CNT3776 - OEM Replacement Furnace Control Board 24V 3TFI Ignition Module is a genuine OEM board by Trane. The CNT3776 board is an ignitor that works with Trane furnace models CST0024, CST0500, CSX0100, CST1000, CST2000, CST2100, and many other furnaces. This new module is a replacement for item number CNU-9125.

The CNT3776-24V 3TFI Ignition Module is produced by Trane. The purpose of this module is to control the ignition function of the furnace.

This Trane control board is an OEM replacement furnace control module for the 3TFI, CNT3776. The ignition module utilizes a transformer-isolated output to prevent ground faults and arc-faults from occurring. This ignition module is able to be used in applications where a traditional three winding ignitor or two winding ignitor is not able to meet the necessary ampacities. The built-in pilot and burner travel delays assure proper flame development before burner operation is allowed. If the flame fails to develop within the delays set, the start command will be turned off immediately.

The CNT3776 is a factory direct OEM replacement 24V 3-stage gas valve. The 24V 3-Stage gas valve is ideal for residential furnace applications where consistent performance and dependability are necessary. If you need dual stage control to maintain high output and energy efficiency, the CNT3776 is the right choice for reliable control.

Our Trane replacement control board CNT3776 is designed for use with 24 VAC systems. It is suitable to replace different lost boards with same model numbers. This part comes with a six months warranty and we honor Kosher certification, UL stamp for safety certification, and energy star approval.

Trane CNT3776 is a replacement furnace control board. It can be used for the following Trane Products  AFU20X1/AFL20X1, AFU25X1/AFL25X1, AFU30X1/AFL30X1, AFU35X1/AFL35X1, AFC20C2, AFC22C2, AFC25C2, AFC30C2, AFU27G1/AFL27G1 (12-Volt only), and AFS22G2. This control board should not be connected