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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
This furnace pressure switch is factory-calibrated with a
Ensure the flow arrow on the bronze body matches the system flow direction so the plug seats against the flow for optimal close-off
Look for visible cracks in the heat exchanger tubes
Technicians should inspect the EPDM seal during every annual service
the Sporlan 401619 C-419-S-T-HH is the industry standard for suction line protection
Trane RLY3179 Relay 320788-703 This furnace pressure switch isThe Trane RLY3179 is a specialized 24V 1A 80s Time Delay Relay engineered for precision sequencing in residential and light commercial HVAC applications. This critical control component facilitates a fixed 80 second delay on make, a vital safeguard that prevents compressor short cycling and mitigates the electrical stress caused by rapid power fluctuations. Designed for seamless integration with 24VAC control circuits, the Trane RLY3179 Relay is a