Resideo - Honeywell Home Q390A1103 Thermocouple

Q390A1103 Thermocouple from Resideo – Honeywell Home delivers precise temperature sensing for gas-fired systems. This CSA-approved thermocouple is designed for standing pilot gas-fired heating systems, offering reliable performance with a 48 inch length and robust construction.

Built to endure demanding environments, it features a hot junction range up to 1400°F and a cold junction range to 780°F, with an open-circuit output of 26–32 mV and a resistance of 0.03 Ω. The 30 millivolt voltage rating supports dependable operation across typical HVAC applications.

The 11/32 inch-32 male connector nut ensures a secure fit, and the included adapter and push-in clip simplify installation, making this thermocouple a straightforward replacement option for compatible equipment.

• 48-inch length for flexible installation in many furnace layouts
• Hot junction up to 1400°F; cold junction up to 780°F
• Open-circuit output: 26–32 mV; resistance: 0.03 Ω
• Connection: 11/32 inch-32 male connector nut
• Includes adapter and push-in clip for quick setup
• CSA approved; ideal for standing pilot gas-fired heating systems