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the -038 kit is specifically sized for the 1 1/2" (38 mm) stroke found on "B" models
It is frequently utilized across Lennox
Since these brands are under the Carrier umbrella
Durable Construction: Built to withstand high-cycling environments common in residential HVAC heating cycles
Carrier HH57ZC003 Enthalpy Switch 318518-761 the -038 kit is specificallyThe Carrier HH57ZC003 Enthalpy Switch is a critical component for optimizing economizer control systems and enhancing energy management in commercial HVACR applications. This genuine OEM replacement part measures both ambient temperature and relative humidity to calculate air enthalpy, providing precise relay output for damper modulation. By evaluating real time atmospheric conditions rather than simple dry bulb temperature, the HH57ZC003 determines
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