Aircon Repairs in Northcliff

At Gauteng Air Conditioning Pros, we’ve seen every type of aircon problem imaginable—residential and commercial. Understanding what’s wrong with your system and what causes it can help prevent future damage and reduce repair costs.

Below is a detailed list of common air conditioning problems, their causes, and our recommended solutions.

 1. Aircon Not Cooling Properly

Cause:

• Clogged filters

• Dirty condenser coils

• Low refrigerant levels (gas leak)

• Faulty thermostat or sensor

Solution:

• Clean or replace filters

• Perform chemical cleaning on coils

• Detect and seal gas leaks, then regas with refrigerant

• Replace or recalibrate the thermostat

 2. Water Leaking from Indoor Unit

Cause:

• Blocked or damaged drain pipe

• Frozen evaporator coils

• Poor installation leading to incorrect slope

• Full drain pan or mold buildup

Solution:

• Clear and flush the drain line

• Defrost and clean coils

• Correct unit leveling

• Disinfect pan and remove blockages

 3. Strange Noises (Buzzing, Rattling, Humming)

Cause:

• Loose screws or parts

• Damaged fan motor or blower

• Worn bearings

• Electrical faults

Solution:

• Tighten internal components

• Replace faulty fan motor

• Lubricate or replace bearings

• Perform electrical fault diagnostics and repair

 4. AC Not Turning On

Cause:

• Tripped circuit breaker

• Blown fuse or capacitor

• Faulty remote or PCB board

• Power supply issues

Solution:

• Reset circuit breaker or replace fuse

• Replace damaged capacitors

• Test and replace faulty PCB or remote

• Ensure stable power source

 5. Weak Airflow

Cause:

• Clogged air filters

• Blocked vents or ducts

• Fan motor issues

• Frozen coils due to low refrigerant

Solution:

• Clean/replace filters

• Clear obstructions from vents

• Repair or replace blower motor

• Check for and fix refrigerant leaks

 6. Thermostat Not Responding

Cause:

• Dead batteries or faulty unit

• Wiring issues

• Sensor misalignment

Solution:

• Replace thermostat batteries or unit

• Inspect and repair wiring

• Calibrate or replace sensor

 7. Frozen Indoor or Outdoor Unit

Cause:

• Dirty filters or coils

• Insufficient refrigerant

• Poor airflow

• Running unit on low temperature for too long

Solution:

• Clean or replace filters and coils

• Regas unit after leak repair

• Improve airflow and adjust fan speed

• Educate user on optimal temperature usage

 8. AC Frequently Turning On and Off (Short Cycling)

Cause:

• Oversized unit

• Dirty condenser coils

• Thermostat placement issues

• Electrical faults

Solution:

• Evaluate system sizing

• Perform deep coil cleaning

• Reposition thermostat

• Conduct thorough wiring and relay inspection

 9. Bad Smells from the Unit

Cause:

• Mold or mildew in filters or ductwork

• Dead rodents or pests in the system

• Dirty evaporator coils

Solution:

• Clean filters and ducting

• Remove pests and sanitize unit

• Apply anti-microbial treatment on coils

 10. High Electricity Bills

Cause:

• Poor maintenance

• Leaking gas

• Obsolete or inefficient unit

• Faulty compressor

Solution:

• Conduct routine maintenance

• Repair leaks and regas

• Recommend energy-efficient inverter units

• Test compressor and replace if necessary