This gauge is rated for 400 PSI at 100°F and 200 PSI at 400°F

verifying the ignitor resistance—typically between 39 and 70 ohms—is the standard procedure for identifying a failed element before a complete lockout occurs

this HVAC flame sensor is built to withstand the rigorous combustion environments of industrial and commercial Modine unit heaters

Designed for professional-tier reliability

Resideo Q3205U1107 Hot Surface Ignitor 321702-401 This gauge is rated forThe Resideo Q3205U1107 GlowFly is a universal hot surface ignitor designed for 120V gas fired heating equipment. Engineered with high density silicon nitride, this heating element replacement provides superior physical durability compared to traditional silicon carbide ignitors, reducing breakage during installation and transit. As a universal HVAC ignitor, it functions as a direct drop in for over 110 OEM furnace models, simplifying truck stock and