Maintenance Guides / HVAC & Air Quality

Replace UV air purifier bulb

Difficulty: moderateTime: 20 minsEst. Cost: $30 - $80

Why it matters

UV-C bulbs lose effectiveness after 9,000–12,000 hours even if they still glow. After a year, they may produce light but no longer kill bacteria and mold spores.

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How to do it

  • 1

    Turn off the HVAC and UV system.

  • 2

    Locate the UV unit inside the air handler.

  • 3

    Wear UV-protective gloves — don't touch the new bulb with bare hands.

  • 4

    Swap bulbs and mark the replacement date on the unit.