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What is the purpose of the four wires
the ST9120C4054 is primarily a timing-based fan control and should be used in conjunction with your ignition module's diagnostics to identify gas-side issues
secure fit in existing panels
reducing the impact of turbulence on sensor readings
Laars Heating Systems E2103200 Limit Switch 326058-758 What is the purpose ofThe Laars Heating Systems E2103200 Limit Switch is a critical safety component designed for high limit temperature monitoring in residential and commercial hydronic boilers. This 250F manual reset roll out switch acts as a fail safe, interrupting the burner circuit if flue gases spill or temperatures exceed the safe operating threshold. Unlike automatic reset switches, the E2103200 requires a technician to manually intervene, ensuring the underlying
