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Is the fan in an ac unit not working? That too in summers? Gosh! Summers & a problematic AC don’t really go hand in hand. AC fans move air for efficient cooling and dehumidification. Comfort and air purity depend on its proper function. Fans can have motor failure, loose or broken belts, filthy blades, capacitor troubles, electrical faults, bearing wear, unbalance, restricted airflow, strange noises, overheating, insufficient lubrication, control board issues, and faulty wiring. Regular AC maintenance can prevent these issues and keep it functioning smoothly. Let us first see what is the actual function of an aircon fan.
What Does the Fan Do on an AC Unit?
Before we learn about the 13 causes of your ac fan being problematic, let us see what does a fan do on an ac unit. Air conditioning fans are essential to comfort and air purity. It circulates air uniformly, distributing cooled or heated air throughout the area. It filters dust and allergens and delivers cold air during cooling mode with the compressor.
- Circulates Indoor Air: Distributes cooled or warmed air evenly.
- Supports Cooling Mode: Works with the compressor to deliver cold air.
- Improves Air Quality: Filters out dust, pollen, and particles for healthier indoor air.
13 Common Issues with AC Fans and How to Fix Them
Let us take at these 13 issues along with their fixes. Read on to find out!
Fan Not Running
Overview: A non-running fan can indicate electrical or motor issues.
- Cause: Blown fuse, tripped breaker, or motor failure.
- Fix: Check circuit breakers, fuses, and replace faulty components.
Fan Runs Constantly
Overview: Continuous fan operation wastes energy and signals a stuck relay.
- Cause: Stuck relay switch or incorrect thermostat settings.
- Fix: Inspect the relay and adjust thermostat settings.
Fan Blowing Warm Air
Overview: Warm air indicates cooling system inefficiency.
- Cause: Refrigerant leak or clogged air filters.
- Fix: Replace filters and consult a technician for refrigerant issues.
Unusual Noises
Overview: Strange sounds point to mechanical problems.
- Cause: Loose parts, debris, or damaged motor.
- Fix: Tighten parts of your central unit, remove debris, or replace the motor.
Fan Not Spinning
Overview: A non-spinning fan disrupts airflow.
- Cause: Capacitor failure or blocked blades.
- Fix: Replace the capacitor or clean the fan blades.
Fan Speed Issues
Overview: Irregular speeds affect cooling efficiency.
- Cause: Malfunctioning control board or motor.
- Fix: Replace or repair the control board/motor.
Fan Motor Overheating
Overview: Overheating can damage the motor.
- Cause: Dirt accumulation or lack of lubrication.
- Fix: Clean the motor and apply proper lubrication.
Fan Starts and Stops Frequently
Overview: Frequent cycling stresses the system.
- Cause: Thermostat issues or electrical faults.
- Fix: Recalibrate the thermostat or fix electrical connections.
Fan Vibrating Excessively
Overview: Excessive vibration indicates imbalance.
- Cause: Unbalanced blades or loose mounts.
- Fix: Balance the blades and secure mounting brackets.
Weak Airflow
Overview: Reduced airflow affects cooling performance.
- Cause: Dirty filters or duct obstructions.
- Fix: Replace filters and clear the ducts.
Fan Blade Damage
Overview: Damaged blades hinder airflow.
- Cause: Wear and tear or external impact.
- Fix: Replace damaged blades.
Electrical Problems
Overview: Electrical issues can halt fan operation.
- Cause: Faulty wiring or connections.
- Fix: Inspect and repair wiring.
Fan Motor Not Receiving Power
Overview: Power issues prevent axial fan operation.
- Cause: Faulty relay or wiring issues.
- Fix: Test relays and repair wiring.
Tips to Maintain Your AC Fan
Here is a look at some tips you can follow to keep your ac fan working.
- Clean air filters regularly.
- Schedule professional maintenance annually.
- Ensure proper lubrication of centrifugal fan components inside.
- Monitor for unusual noises or reduced airflow.
Final Word
Summing up, air quality, air circulation, and warm air removal depend on your AC fan. Cleaning and inspections by HVAC professionals keep things running smoothly and prevent problems.
In conclusion, understanding the AC blower fan helps you maintain and extend the life of your air conditioning system.
TIME TO FIX YOUR AIRCON FAN!
