99042-1 AERCO Boiler SINGLE ELEMENT T-COUPLE Normal Stocking Item in Our Warehouse AERCO 99042‑1 is the OEM Single‑Element Thermocouple (T‑Couple) used for precise temperature sensing in AERCO boilers and commercial water‑heating systems. Grounded search results confirm its identity, function, and pricing across multiple distributors. 🔧 Core Identity & Function Part Number: 99042‑1 Component: Single‑Element Thermocouple OEM: AERCO This thermocouple provides accurate, real‑time temperature feedback to the boiler’s control system. It is used for: Burner modulation Safety shutdown logic Temperature‑limit protection Hydronic system stability Technical Characteristics Sensor Type: Single thermocouple Output: Millivolt signal proportional to temperature Application: AERCO boilers & commercial water heaters Function: Temperature measurement for modulation & safety Construction: High‑temperature, commercial‑grade Applications Used in: AERCO commercial boilers AERCO commercial water heaters Hydronic heating systems requiring precise temperature sensing Typical replacement scenarios: Temperature drift Faulty or unstable readings Ignition or modulation faults Preventive maintenance AERCO 99042‑1 Single‑Element Thermocouple — OEM temperature‑sensing probe for AERCO boilers and water heaters. Provides accurate, stable thermal feedback for burner modulation, safety shutdown, and hydronic system control. Engineered to AERCO factory specifications for reliable commercial performance.