Problem Solver

AC Won't Turn On in Lafayette, LA

A completely unresponsive system — no sound, no fan, nothing — usually points to power, the thermostat, or the breaker rather than a major mechanical failure.

Call NILOV for Diagnosis Request Help

Common Causes

A tripped breaker
Dead thermostat batteries or a thermostat that lost power
The outdoor disconnect switch in the off position
A blown fuse at the outdoor unit
A failed capacitor or contactor preventing the system from starting
A wiring or control issue that needs a professional diagnosis

What You Can Safely Check

Check the thermostat display is on; replace batteries if it uses them
Check whether the breaker for the HVAC system has tripped (a visual check only)
Confirm the thermostat is set to Cool or Heat and to a temperature that should call for the system to run

When to Call NILOV

The system still will not turn on after these checks
The breaker trips again when reset
You hear a faint hum but the system does not start — do not keep trying to force it, this can point to a failing capacitor or motor

Dealing with this in your home?

Call NILOV. Tell us the symptom, your town, and what your system is doing.

Call (337) 450-8886 Request a Free Quote

Next Pages to Visit

AC Repair Electrical Services Breaker Tripping Thermostat Not Working

FAQ

AC Won't Turn On Questions

My thermostat is on but the system still will not start. What now?

Confirm the breaker has not tripped and the outdoor disconnect is in the on position. If it still will not start, call NILOV rather than repeatedly trying to force it on.

I hear a hum but nothing turns on. Is that bad?

A hum without the system starting can point to a failing capacitor or motor. Turn the system off at the thermostat and call NILOV rather than letting it keep humming.

Could this be a simple fix?

Sometimes — a tripped breaker or dead thermostat batteries are simple, safe fixes. Anything beyond that is worth a professional diagnosis.