Lennox 99K31 Relay mario Exceeding this limit may damage

Exceeding this limit may damage the internal silicone diaphragm and affect the accuracy of the set point

making it suitable for 24 VAC/VDC control circuits commonly found in HVAC automation

Durable Construction: Features a robust iron body and stainless steel internal trim for extended service life in harsh environments

As the first component to activate during a heat call

Built for internal evaporator coil applications

Lennox 99K31 Relay mario Exceeding this limit may damageThe Lennox 99K31 relay is a critical OEM replacement component designed specifically for managing blower motor operations in Lennox residential furnaces and AHUs. Rated for a 2. 5 4. 0 AMP load, this SPNO (Single Pole Normally Open) relay ensures reliable low voltage control over high voltage circuits. Field technicians prioritize the 99K31 for its precise 24V coil voltage compatibility, which prevents common failures like relay chatter or pitted