Resideo CQ100A1039 Universal Thermocouple 30mv 30 Inches

Product Description

The RESIDEO CQ100A1039 is a 30-inch universal thermocouple designed for gas pilot safety control in residential and light-commercial heating appliances. Generating 30 millivolts (mV) from the heat of a standing pilot flame, the thermocouple signals the gas valve to remain open when the pilot is lit and shuts off gas flow automatically if the flame goes out. The universal adapter tip is compatible with screw-in, clamp-in, and push-in pilot burner configurations, making this a single part that covers a wide range of field replacement scenarios without special tooling.

This thermocouple is intended for use in gas furnaces, boilers, water heaters, and room heaters equipped with a standing pilot and a millivolt-operated gas valve. It is a direct field-replacement part suited for residential service calls and light-commercial maintenance work where the original thermocouple has failed, degraded, or been damaged. The 30-inch lead length provides adequate routing clearance in most standard appliance cabinets.

Key Features

• 30 mV output — compatible with standard millivolt gas valve safety circuits
• 30-inch lead length suits most residential appliance cabinet depths
• Universal adapter tip fits screw-in, clamp-in, and push-in pilot burner styles
• Single-part solution reduces van stock needed for pilot system repairs
• Automatic gas shutoff when pilot flame is extinguished

Compatibility

Designed as a universal OEM-style replacement thermocouple for standing-pilot gas furnaces, boilers, water heaters, and room heaters that use a 30 mV millivolt gas valve safety circuit.

Installation Notes

Installation is performed by a licensed gas appliance technician or qualified HVAC-R service professional. Before servicing, shut off the manual gas supply valve and allow the pilot assembly to cool completely. The thermocouple tip must be fully seated in the pilot bracket clip or threaded fitting, and the connection nut at the gas valve should be finger-tightened then snugged with a wrench — do not overtighten. Verify pilot flame engulfs the thermocouple tip at least 3/8 inch after reassembly and confirm proper gas valve response before returning the appliance to service.

Technical Specifications

• Output Voltage: 30 millivolts (mV)
• Lead Length: 30 inches
• Adapter Type: Universal (screw-in, clamp-in, push-in)
• Weight: 0.175 pounds
• Unit of Measure: Each

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: CQ100A1039