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5-ton systems
25" Bore: Ensures accurate shaft seating and reduces mechanical stress on the drive assembly
including cross-references for 3120A357 and 3120A3571
Frequent indicators include the vacuum pump slowing down shortly after a full charge
The Heil Quaker ICP 1177395 Spark Module Replacement Kit is a critical OEM ignition control upgrade designed for consistent pilot re-ignition and burner sequencing in residential and light commercial furnaces
Lochinvar & A.O. Smith 100113143 Switch 320788-702 5-ton systemsThe Lochinvar & A. O. Smith 100113143 Blocked Inlet Switch is a critical safety component designed for high efficiency commercial water heaters and boilers, including the Cyclone BTH and State SUF series. This genuine OEM replacement part acts as a normally closed (NC) pressure sensor calibrated to 2. 5" WC. Its primary function is to monitor the integrity of the air intake system, ensuring the combustion blower receives adequate airflow for safe
