The Supco Q101 Sequencer is a heavy-duty single-pole single-throw (SPST) heating control designed for reliable electric heat sequencing in residential and light commercial forced-air systems. Engineered as a direct replacement for the B1290906, this DPST electric heat sequencer manages the timing of heating elements and blower motors to prevent circuit overloads during startup. With a 24V heater coil rating, the Q101 features 1-4 timings with a 1-110 second on-delay and a 1-110 second off-delay, ensuring optimized BTU output and system efficiency. Its robust construction handles high-amperage loads, making it a critical HVAC replacement part for contractors troubleshooting intermittent heating cycles or stuck contacts. This multi-poise mounting sequencer operates in any position, facilitating quick field installation in tight furnace plenums. By maintaining precise fan delay control, the Q101 protects the heat exchanger and improves airflow delivery across the coil. Key Benefits: Universal Compatibility: Serves as a drop-in replacement for Goodman B1290906 and various Klixon or Mars style sequencers. Thermal Protection: Prevents nuisance tripping by staggering the electrical draw of resistive heating elements. Field Reliability: Tested for high-cycle performance in electric furnaces and heat pump air handlers. Simplified Wiring: Features standard 1/4-inch quick-connect terminals for rapid HVAC circuit integration. Common Questions: Can the Q101 replace a multi-stack sequencer? The Q101 is a single-timing control. If your system requires multiple stages of heat to be staggered at different intervals, you may need a multi-pole sequencer or multiple Q101 units wired in parallel to match the original OEM wiring schematic. How do I verify if the resistance coil is failing? Use a multimeter to check for 24V AC at the bottom heater terminals. If voltage is present but the contacts (M1-M2) fail to close within the 110-second window, the thermal bimetal or heater coil has reached end-of-life. What causes these sequencers to stay stuck in the 'ON' position? Frequent cycling or over-amping can cause the internal contacts to weld together. Always check the amperage draw of your heating elements against the Q101’s rated capacity to ensure long-term component durability. 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.
