Power switch
A switch on or near the unit, often like a light switch. Make sure it is on.
Indoor air handler not moving air or shutting down?
The air handler is the indoor unit that moves conditioned air through the ducts. When it fails, the system may run outside but no air reaches the rooms, or it shuts down on a safety switch. Call 833-877-1717. RepairNowUSA connects the request. An independent HVAC technician does the repair.
Am I in the right place?Yes for no airflow, an air handler that shuts off, water around it, or burning or electrical smells.
Is this urgent?Yes in extreme heat or cold. Burning smell: turn it off. If anyone shows signs of heat illness, such as confusion, dizziness, nausea, or hot dry skin, call 911 and move them somewhere cool.
What do I do next?Turn the system off if you smell burning or see water, and call 833-877-1717.
Water at the unit: AC drain line. Blower specifically: blower motor.
RepairNowUSA editorial review · Last substantively reviewed October 13, 2026 · Review standards
What to check
Door panel
A loose access panel trips a safety switch and stops the unit.
Filter and pan
A clogged filter, or a full drain pan with a float switch, can shut it down.
Electrical components inside
Do not remove panels beyond the filter door. The air handler has high-voltage wiring and, with heat strips, very hot elements.
Common air handler failures
Blower motor or capacitor
Hum but no air. See blower motor.
Control board
No response to the thermostat.
Float switch tripped
Full drain pan shuts the system off.
Heat strips
No heat on electric or heat pump systems.
What to have ready when you call
- Property ZIP code, home or business
- Where the air handler is
- What it does: nothing, hums, shuts off
- Any water, smell or noise
- Heating, cooling or both affected
- System brand and age
What happens when you call RepairNowUSA
- Describe what is happening in plain words and give the property ZIP code. You do not need to know which trade to ask for.
- RepairNowUSA checks for a participating independent provider who handles air handler repair in that area.
- If one is available, you are connected. The provider confirms timing, access, scope and price with you before any work.
- The provider, not RepairNowUSA, diagnoses and performs the repair.
RepairNowUSA is a referral and connection service. Provider availability and response times vary by location, time and demand, and are not guaranteed. Before you approve work, ask what was found, the price, the timing and what is not included.
Call 833-877-1717Air handler questions
What is an air handler?
The indoor unit with the blower and coil that pushes air through the ducts. It pairs with a heat pump or AC outside.
Can I call at night?
Yes. You can call 833-877-1717 at any time, including nights, weekends and holidays. Whether an independent provider can come out right away depends on your ZIP code, the time and provider capacity, so availability is not guaranteed.
Why does my air handler shut off?
Common causes are a full drain pan, overheating from a dirty filter, or a failing motor or control.
Do providers work on all brands?
Independent HVAC providers commonly work on major brands such as Carrier, Trane, Lennox, Rheem, Goodman, Bryant and York. Tell RepairNowUSA the brand on the call. RepairNowUSA is not affiliated with or authorized by any manufacturer, and warranty work may need the manufacturer’s own network.
Authoritative references
These public sources give general safety context. They do not replace an on-site evaluation, and RepairNowUSA does not perform the work.