York S1-024-19082-034 Relay

The York S1-024-19082-034 Heat Sequencer Relay is a professional-grade 24V control designed for the precision management of electric heating elements in residential and light commercial air handlers. As a critical component for electric furnace staging, this thermal-type sequencer prevents excessive inrush current by staggering the activation of heating banks, ensuring the stability of the building's electrical service. This OEM York heating control is engineered with specific time-delay characteristics to allow the blower motor to reach optimal CFM before the elements energize, reducing the risk of high-limit tripping and thermal stress on the heat exchanger. Whether you are performing a York heat pump sequencer replacement or troubleshooting a 24V HVAC staging relay, this component provides the reliable switching required to maintain system coefficient of performance (COP). Its rugged construction is built to withstand the frequent cycling common in cold-weather demand, making it the standard choice for technicians seeking a multi-stage heat sequencer that matches original factory specifications for timing and load capacity.

• Optimized Load Management: Staggers heating element activation to prevent circuit breaker trips and voltage drops during startup.
• System Longevity: Reduces thermal shock to the plenum by ensuring consistent airflow is established before heat generation.
• Universal 24V Compatibility: Specifically designed for seamless integration with York, Luxaire, and Coleman electric heat kits.
• Precision Switching: Maintains exact factory-specified delay-on and delay-off intervals for accurate temperature staging.

How do I know if the sequencer is failing or the element is burnt out?
If the blower runs but the air remains cold, check for 24VAC across the sequencer coil. If voltage is present but the M1/M2 contacts fail to close after 60-90 seconds, the sequencer is defective. If the contacts close but there is no amperage draw on the heater lead, the element or limit switch is likely open.

Can I use this relay for both heating elements and the blower fan?
Yes, this sequencer is often wired to trigger the blower fan on the first stage (M1/M2) to ensure the coil is cooled immediately as the first heating element energizes.

What causes a sequencer to stay "stuck" in the ON position?
A stuck sequencer is usually caused by internal contact welding or a fatigued bimetal strip. This results in the "fan always running" or "constant heat" symptom, even when the thermostat is satisfied.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.