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The INTERNATIONAL COMFORT PRODUCTS A39 is an A-section V-belt measuring 41.2 inches in outside circumference, designed for use in belt-driven HVAC blower and fan assemblies. This belt transmits power between the motor sheave and the blower pulley in forced-air systems, maintaining proper airflow across residential and light commercial applications. Manufactured to standard A-section dimensions, the A39 delivers consistent tension and grip under normal operating temperatures and loads. Installation is typically performed by licensed HVAC technicians during routine preventive maintenance or blower motor service.
The A39 V-belt is suited for forced-air furnace and air handler blower assemblies that use A-section belt drives. It fits applications where the standard A-series belt profile is specified, making it a common replacement item during seasonal tune-ups or when a worn, cracked, or stretched belt is found during inspection. Technicians servicing older residential furnaces and air handlers with belt-drive blower configurations will find this belt a direct-fit replacement in those systems.
Designed as an OEM-style replacement for residential and light commercial forced-air HVAC systems using A-section belt-drive blower configurations where an A39 belt is specified.
Belt replacement is performed by licensed HVAC technicians. Always disconnect and lock out electrical power to the air handler or furnace before removing the blower access panel or handling belt-drive components. Inspect sheaves and pulleys for wear or misalignment before installing the new belt, and verify proper belt tension per the equipment manufacturer's specifications after installation. Do not operate the unit with guards removed.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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