Lennox 91J89 Control Board, Economiser, Em1-1

The Lennox 91J89 Control Board receives temperature settings from the thermostat and then adjusts the HVAC system so that the unit can condition the air accordingly.

• Designed with safety in mind, real OEM controls won’t compromise unit integrity or operator well-being, resulting in better performance and efficiency
• Fits popular LCH600S4-01, LCH540S4-01, LCH420H4-01 units and more (see FITS MODELS below for complete list)
• Common Equipment Type(s):
• Application: Economizer
• Model: EM1-1