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The Siemens 243-0018 is a non-adjustable logic relay
This gasket is the primary valve seal for Series 53
Key Benefits for Technicians: Optimized Metering: Specifically calibrated for TE 5 series bodies to provide precise thermostatic expansion valve performance
When replacing a brittle or clogged HVAC drain tube
Enhanced Durability: Rigid stainless steel construction resists cavitation and chemical degradation in aggressive fluid environments
Williams P322055 Vent Safety Switch The Siemens 243-0018 is aFor contractors servicing Williams Monterey Counterflow Top Vent Furnaces, the Williams P322055 Vent Safety Switch is the code compliant OEM replacement required to maintain the integral safety loop. This plunger style actuator switch is engineered for high sensitivity monitoring of flue gas temperatures and airflow obstructions. Designed for specific 35,000 BTU Monterey models, including units 3509821 and 3509822, it functions as a critical vent
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