Mestek j38r06890-003 Flame Sensor Gg Xf Series

Product Description

The MESTEK j38r06890-003 is a replacement flame sensor designed for gas-fired unit heaters. The flame sensor monitors the burner flame during operation, sending a microamp signal to the furnace control board to confirm ignition. If the signal is absent or falls below threshold, the control board shuts off the gas valve as a safety measure. This part is installed by licensed HVAC technicians as part of routine maintenance or when diagnosing ignition lockout faults on gas-fired heating equipment.

This flame sensor is designed for use in the GG XF Series gas-fired unit heaters. Unit heaters of this type are commonly found in commercial and industrial applications such as warehouses, garages, and manufacturing facilities where overhead or suspended gas heat is used. The j38r06890-003 is an OEM-replacement component suited for service work on these specific heater series.

Key Features

• OEM-style replacement flame sensor for GG XF Series gas-fired unit heaters
• Monitors burner flame to confirm ignition and enable safe gas valve operation
• Sends microamp rectification signal to the ignition control board
• Direct replacement part minimizes diagnostic and installation time

Compatibility

Designed as a direct OEM-replacement flame sensor for GG XF Series gas-fired unit heaters.

Installation Notes

Flame sensor replacement is performed by a licensed HVAC technician. Shut off all electrical power and close the manual gas shutoff valve before beginning service. Flame sensors are fragile ceramic and metal rod assemblies — handle with care and avoid touching the rod with bare hands, as skin oils can degrade performance. Follow all applicable local codes and the manufacturer service documentation when reinstalling the sensor and restoring the heater to operation.

Technical Specifications

• Component Type: Flame Sensor
• Application: GG XF Series Gas Fired Unit Heaters

Standard Information

• Brand: MESTEK
• Manufacturer Part Number: j38r06890-003