Ac Outside Fan Won T Turn On

Introduction

Is your air conditioner blowing warm air even though its switched on? The problem might be the outside fan, also called the condenser fan, not turning on. This fan is crucial because it helps release the heat from your home outside. Without it, your AC system can’t cool the air properly, leading to uncomfortable temperatures and potentially damaging your system. This is especially concerning during heat waves, and it’s important to address the issue quickly to prevent further damage and keep your home cool.

Common Causes of ac outside fan won t turn on

Here are some common reasons why your AC’s outside fan might not be working:

Tripped Circuit Breaker: A power surge or overload can cause the circuit breaker for your AC unit to trip.
Faulty Capacitor: The capacitor helps start and run the fan motor. If it’s bad, the fan won’t turn.
Dirty Fan Blades or Condenser Coils: Dirt and debris can restrict airflow, causing the fan motor to overheat and stop working.
Obstruction: Something might be blocking the fan blades, preventing them from spinning.
Overheated Motor: The fan motor can overheat and shut down if it’s working too hard or not getting enough airflow.
Wiring Issues: Loose or damaged wires can interrupt the power supply to the fan motor.
Bad Contactor: The contactor is an electrical switch that supplies power to the fan motor. If it’s faulty, the fan won’t receive power.
Frozen Evaporator Coil: A frozen evaporator coil inside the house can prevent the AC unit from cooling and trigger a safety shutdown, affecting the outside fan.

Symptoms Checklist

Use this checklist to help identify the problem:

The inside AC unit is running, but the air is not cooling.
The outside AC fan is not spinning at all.
You hear a humming sound from the outside unit, but the fan doesn’t move.
The outside unit is making unusual noises.
The circuit breaker for the AC unit keeps tripping.
The outside unit feels hot to the touch.

How to Fix ac outside fan won t turn on Step-by-Step Guide

Follow these steps to troubleshoot your AC’s outside fan:

Turn off the Power: Locate the circuit breaker for your AC unit in the electrical panel and switch it OFF. Safety first!
Inspect the Fan Blades: Check for any obstructions like leaves, twigs, or debris blocking the fan blades. Remove any obstructions carefully.
Clean the Condenser Coils: Use a garden hose (with a gentle spray nozzle) to rinse the condenser coils from the inside out. Avoid using high pressure, as it can damage the fins.
Check the Capacitor: (Only if comfortable and familiar with electrical components) Locate the capacitor inside the control panel of the outside unit. Look for signs of bulging, leaking, or corrosion. If you see any of these signs, DO NOT TOUCH IT, call a professional.
Inspect the Wiring: Check for any loose or damaged wires connected to the fan motor and contactor. Tighten any loose connections and replace any damaged wires (after turning off power).
Reset the Breaker: After inspecting everything, switch the circuit breaker back ON.
Observe the Fan: Monitor the fan to see if it starts spinning. If it doesn’t, proceed to the next step.
Try a Manual Start: (Only if comfortable and after turning off power again). Carefully try to spin the fan blades with a stick or long screwdriver. If the fan starts spinning after a little push, it might indicate a failing capacitor. Note, turn off the power first!
Check the Contactor: Look for the contactor inside the control panel. It’s a switch with visible contacts. If the contacts are burnt or corroded, the contactor may be faulty. Call a professional.
Wait and Observe: Sometimes the motor has overheated and has thermal protection. Leave the power on and come back in 30 minutes. The fan may start by itself if it has cooled down.

Fix the Issue Without Buying Parts

Here are a few things you can try before considering replacement parts:

Regular Cleaning: Keep the area around the outside unit free of debris and clean the condenser coils regularly (at least twice a year).
Proper Airflow: Ensure that there’s adequate space around the unit for proper airflow (usually at least 2-3 feet).
Circuit Breaker Reset: Resetting the circuit breaker can sometimes resolve temporary electrical issues.
Inspect for Obstructions: Regularly check for and remove any obstructions blocking the fan blades.
Fan Blade Lubrication Some fan motors have oil ports. Check your owner’s manual. If it does, use a lightweight motor oil.

When Replacement Might Be Necessary

If you’ve tried the above steps and the fan still isn’t working, you might need to replace some parts. Common parts that fail include the capacitor (estimated cost: $20-$100), the fan motor (estimated cost: $100-$300), or the contactor (estimated cost: $30-$150). These prices are estimates and don’t include labor costs. It’s often best to consult with a qualified HVAC technician for accurate diagnosis and replacement, especially if you’re not comfortable working with electrical components.

Safety Warning

Before attempting any repairs, keep these safety tips in mind:

Always turn off the power to the AC unit at the circuit breaker before working on it.
Avoid touching any electrical components with wet hands.
Be careful when working around moving parts.
If you’re not comfortable working with electrical components, call a qualified HVAC technician.

Tools You May Need

Here are some tools that might be helpful for troubleshooting:

Screwdrivers (Phillips and flathead)
Pliers
Wrench
Garden hose with a spray nozzle
Gloves
Safety glasses

FAQ

Here are some frequently asked questions:

Q: How do I know if my capacitor is bad? A: Look for signs of bulging, leaking, or corrosion on the capacitor.
Q: Can I replace the capacitor myself? A: It’s recommended to have a qualified technician replace the capacitor due to the risk of electrical shock.
Q: Why does my circuit breaker keep tripping? A: This could be due to a faulty component, a short circuit, or an overloaded circuit. Consult an electrician.
Q: How often should I clean my condenser coils? A: At least twice a year, or more frequently if you live in a dusty environment.

Conclusion

Troubleshooting a non-working AC outside fan can seem daunting, but by following these steps, you can often identify and fix the problem yourself. Remember to prioritize safety and don’t hesitate to call a qualified HVAC technician if you’re unsure about any of the steps. Taking a DIY approach can save you money and give you a better understanding of your AC system. However, its important to know when to call in the professionals, especially for complex repairs. Good luck!