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Outside Ac Unit Not Turning On 3 Easy Answers

Outside ac unit not turning on. Especially during the summer, an air conditioner can be an essential feature of a cozy interior space. When the exterior AC unit falls flat to turn on, it can be a source of frustration and discomfort. However, understanding the potential reasons behind this issue and implementing an orderly investigation approach can help recognize and resolve the issue efficiently. This article will guide you through the steps to diagnose and address common issues that will prevent your exterior AC unit from turning on.

Outside ac unit not turning on

Outside ac unit not turning onOutside ac unit not turning on

Power Supply

The first and easiest step to check when your outside AC unit isn’t turning on is the control supply. Ensure that the unit is getting power by checking the circuit breaker and affirming that it is in the “on” position. Furthermore, inspect the fuse associated with the AC unit to ensure it isn’t blown. If the circuit breaker is stumbled or the fuse is blown, reset the breaker or replace the combine and attempt to turn on the unit again.

Thermostat Settings

Verify the thermostat settings to guarantee they are arranged correctly. Some of the time, a simple oversight, such as off-base temperature settings or a mode other than “cool,” can prevent the AC unit from turning on. Alter the thermostat settings and wait a few minutes to see if the unit begins operating.

Thermostat Batteries

If the batteries in a heating and cooling system run low, the system may not send the signal to turn on the air conditioner. Remove the heating system’s power source to see if that resolves the issue.

Dirty or Clogged Air Filters

Airflow is pivotal for the proper functioning of the AC unit. Messy or clogged air filters can limit airflow, causing the system to overheat and close down. Routinely check and replace air filters to ensure ideal execution. In the event that the channels are dirty, supplant them and attempt to turn on the AC unit again.

Condensate Overflow Switch

Modern AC units are equipped with a condensate flood switch that turns off the system if the condensate drain line is clogged, avoiding potential water damage. Check the drain line for clogs and clear any hindrances to permit proper drainage.

Capacitor Issues

Outside ac unit not turning onOutside ac unit not turning on

The capacitor may be a crucial component that gives the essential shock to begin the AC compressor. A flawed capacitor can result in the AC unit not turning on. Capacitors can weaken or fail over time, and their substitution may be necessary. Counsel a professional HVAC professional to inspect and replace the capacitor if needed.

Tripped High-Pressure Switch

AC units are prepared with a high-pressure switch that shuts down the system if the refrigerant weight is too high. Typically, safety includes preventing harm to the compressor. If the high-pressure switch is tripped, it may have to be reset by a qualified professional who can explore and resolve the basic cause of the high pressure.

Compressor Contactor Issues

The compressor contactor is responsible for supplying control to the compressor. If the contactor is faulty or worn out, it may prevent the compressor from turning on. A proficient technician can assess and replace the compressor contactor if necessary.


When your outside AC unit refuses to turn on, it’s fundamental to systematically troubleshoot the potential causes. From power supply issues to thermostat glitches and component failures, the arrangement can shift. While a few troubleshooting steps can be performed by homeowners, certain issues may require the ability of a qualified HVAC technician. Standard maintenance and inciting attention to issues can help keep your AC unit running easily, ensuring a comfortable indoor environment in a hot climate. In the event that troubleshooting steps don’t resolve the issue, it’s recommended to look for professional help to diagnose and address more complex issues with the exterior AC unit.

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