What would cause an air conditioner to not turn on?

What would cause an air conditioner to not turn on?

The AC unit won’t turn on Usually when the outdoor unit doesn’t turn on, it is because something tripped the circuit breaker. When this happens, you can easily reset it after locating the circuit breaker panel. If you find that the AC unit still does not work, the next place to look is the thermostat.

What do you do if your air conditioner won’t turn on?

What Should I Do if My Air Conditioner Won’t Turn On?

1. Check your Thermostat.
2. Check Your Air Filter.
3. Look for a Blown Fuse/Tripped Circuit Breaker.
4. See if the Emergency Shut-Off Switch Is Tripped.
5. Check the Inside Unit’s Power Switch.
6. Make Sure the Drain Pan & Lines Aren’t Clogged.
7. Look for a RESET Button.

Is there a fuse for the air conditioner?

The fuse, particularly common in newer models, helps protect the electronic control. Check to ensure that the power supply to your unit is good, then unplug the air conditioner and remove the cabinet cover. The fuse will be located near the circuit board; check to see if it has blown, using a multi-meter if necessary.

How do you check a AC compressor fuse?

The best way to test for a blown fuse is by using a voltmeter.

1. To verify that you have a blown fuse on hand, the first step is to locate the disconnect box.
2. Lift or swing open the outer and inner cover of the disconnect box to expose the cables.
3. Check the voltmeter to make sure that it is functioning properly.

Why my AC thermostat has no power?

The power is out or a circuit breaker has tripped The power loss could also be the result of a tripped circuit breaker that powers the air conditioner or heater. Many thermostats run on low voltage sent from the transformer on the HVAC system; if the transformer loses power, so will the thermostat.

What do you do if your thermostat has no power?

In the event your home loses power, that could trip your circuit breaker, resulting in a power loss to your thermostat. To troubleshoot this, head over to your circuit breaker and ensure the breaker powering your thermostat is turned on. If it’s off, try resetting it.

What has C-wire but no power?

Quick Check for an Existing C-wire: If the thermostat loses power it does not have a C-wire, and you may need an add-a-wire kit. If it doesn’t lose power, locate your breaker panel. Flip the breaker for the wall with the thermostat on it. If it loses power, you likely have a C-wire.

Where does my thermostat get power?

Most room thermostats on heating and cooling systems receive their 24V AC electrical power from a low voltage transformer that itself is usually found at the boiler or furnace (blue arrow in our photo at left). Watch out: some room thermostats require a battery to operate at all.

How do you test if C wire has power?

It is easy to see if you already have a c-wire connected to your system. Simply remove your current thermostat face from its baseplate and look for the terminal labeled with the letter “c.” If this terminal has a wire attached to it, you have an active “c-wire.”