Whole-home Carrier humidifier does not add moisture even though it appears to run.

Safety first: Turn off furnace power and shut off humidifier water supply before opening the humidifier cabinet.

Steps:

• 1. Check water flow: Open the water supply valve fully. With the furnace calling for heat and humidifier on, verify that water flows through the pad and drains out.
• 2. Replace water panel: Carrier bypass and fan-powered humidifiers use an evaporative pad. Replace the pad annually or if it is clogged with mineral deposits.
• 3. Verify damper position: Ensure the bypass damper (if present) is in the WINTER or OPEN position during heating season.
• 4. Check settings: Confirm the humidistat or thermostat humidity setting is appropriate for outdoor temperature.