Broan AI series ERVs exchange stale indoor air with fresh outdoor air while transferring heat and moisture, making them common in tighter homes where ventilation is essential. Repairs are often worthwhile for components like fans, controls, or sensors, especially when the core is clean and the ducting is properly balanced.
Replacement becomes more attractive when the core is damaged, the unit has chronic condensation issues, or multiple blower/control components fail, since labor can be significant in attic or mechanical-room installations. Before replacing, check that filters are maintained and that drains (if present) are clear; restricted airflow can overwork motors and trigger fault codes that resemble electronics failures.
Compare repair estimates to the threshold, but also consider IAQ needs: if the unit is undersized or poorly balanced, upgrading or recommissioning can improve humidity control and reduce odor and CO2 buildup. If you've had repeated moisture problems or frost issues in winter, evaluate defrost strategy and duct insulation before committing to major repairs.