Description
Like all water heater ignitor replacements
replacing the defrost control board usually restores normal operation
What are the connection sizes for this 10-ton compressor
What is the difference between an isolated coil and a grounded coil
Featuring a 3/4-inch NPT connection and a 7
Lennox 21J99 Control Board 328140-751 Like all water heater ignitorThe Lennox 21J99 is a genuine OEM replacement for aging or failed Direct Spark Ignition (DSI) control boards in residential furnace applications. Labeled under catalog number 21J99 and part number 105802 02, this module manages the trial for ignition period and flame sensing and operation of the inducer motor to ensure stable combustion cycles. Designed specifically for Lennox branded equipment, it replaces outdated ignition modules that cause common
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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