Johnson Controls A19AAF-4 Thermostat 30067439-890 The Resideo Q4100C9048 Ignitor is

The Resideo Q4100C9048 Ignitor is a heavy-duty 120V silicon carbide hot surface igniter engineered for professional-grade field service replacement in residential and commercial gas-fired appliances

Common Questions: Can I use a 440V capacitor if my original was 370V

protecting the furnace control board from amp spikes

Using higher voltage will destroy the coil instantly

technicians should verify the factory model number to ensure a secure fit with existing gas valve manifolds and safety magnet systems

Johnson Controls A19AAF-4 Thermostat 30067439-890 The Resideo Q4100C9048 Ignitor isUtility Thermostat, 120 208 240 Vac, 40 90 Degree Temperature Range, 1. 5 Degree Fixed Differential, 6' Rubber Coated Capillary Length, Automatic Reset, Screw Driver Range Adjuster A19AAF 4 is identical to A19AAF 4C