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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
or system error codes related to air pressure switches and flame rectification issues
Common indicators include the pilot failing to stay lit after the thermocouple heats up
provided it is installed in a well-ventilated area per local mechanical codes
check the SPST terminals while the inducer is running
Rugged reliability for condensing units operating in extreme ambient conditions
Lennox 99K31 Relay 318172-701 or system error codes relatedThe 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