Time Delay Fan Relay DPST Switch | 24V | NS104 Ensure proper blower fan sequencing in HVAC systems with this brand-new NS104 time delay fan relay. Featuring a DPST switch configuration and 24V coil voltage, this relay is engineered for dependable performance in heating and cooling applications. With a delay-on range of 30–90 seconds and delay-off range of 1–30 seconds, it helps prevent short cycling and ensures efficient airflow control. Features & Benefits: ✅ DPST switch configuration with 24V coil voltage ⏱️ Delay-On: 30–90 seconds | Delay-Off: 1–30 seconds Pressure-sensitive short circuit interrupting capability Compatible with a wide range of HVAC systems Condition: Brand New – Unused Replaces Part Numbers: GS104, Q104, TD-34, 24A34-4, 33245 ✅ Fits HVAC Systems & Furnace Models: Compatible with various residential and commercial HVAC systems using time delay fan relays. Model-specific compatibility varies by system design. Please verify your part number and relay configuration before ordering. Common Fixes: ❌ Blower fan starts too early or runs too long ⚠️ Short cycling or inefficient airflow Relay failure causing inconsistent fan operation Upgrade for restored timing and system efficiency ️ Installation Tips: Disconnect power before servicing HVAC equipment Mount relay securely and connect wires per system schematic Confirm coil voltage and switch configuration match system requirements Test fan delay timing after installation to ensure proper sequencing Control the cycle. Protect the system. Restore your HVAC performance with a high-quality Napco relay.