the A99BB-200 is the direct functional replacement

remote-bulb immersion-type temperature control engineered for high-limit safety applications in hydronic boilers and storage tanks

always verify coil voltage and physical footprint to ensure safety and fitment in the existing control box

Enhanced Durability: Heat and chemical-resistant rubber components are built to handle commercial backflow prevention stressors

5-ton air conditioning compressor

Lennox 67K19 Relay 318973-401 the A99BB-200 is the directThe Lennox 67K19 Relay (part number 67K1901) is an essential OEM replacement component engineered for high reliability switching in residential and commercial HVAC systems. This 120V relay is typically configured for SPDT (Single Pole Double Throw) or SPST (Single Pole Single Throw) operation, depending on the specific furnace or air handler wiring requirements. Operating at 50 60 Hz, it provides precise control over high voltage circuits for