Not everyone is an expert on air conditioning repairs but on really hot days you want your central AC to work, and you want it to work NOW. Check these basic tips before calling your service man; a simple fix can save you time, cash, and sweat.
Air Conditioner Repair: Will not run
- Check if the power is turned on at your breaker or fuse box.
- See if there is a service switch at the outdoor unit (condenser) and confirm that it is in the on position.
- Verify your thermostat settings.
- If it is not at least 50f outside there may be a sensor open to protect the compressor.
- Be sure that a digital thermostat has good batteries. Replace them if you are not sure.
Air Conditioner Repair: Poor or no air flow
- Check for a dirty air filter at the furnace
- Confirm that the furnace blower fan runs
- Open all registers and grilles during the cooling season
- Cooling coil (evaporator coil mounted in the sheet metal plenum above the furnace) may be iced up preventing airflow. This could have been caused by:
- Setting the thermostat too cold. ( system is not designed to cool much below 70f or 20c
- Blocking or closing off too many vents/grilles.
- Restricted filter or dirty cooling coil.
- Low on Refrigerant (Freon). System therefore has a leak and must be professionally repaired
Air Conditioner Repair: Everything runs but no cooling
- Outdoor condenser may be dirty and compressor locked out. Turn off and clean unit. Once it is clean and cooled down, unit may reset itself.
- One of the electrical components may have failed.
- System may have lost its refrigerant (Freon) charge.
Air Conditioner Repair: Water leaking from furnace
- See if the condensate drain hose at the furnace is clear and sloped to the floor drain or condensate pump.
- If the system is really old the drain pan could be blocked with scale or rusted through.
- Furnace blower may not be set up properly and water is being blown off the cooling coil before it can reach the drain pan.
Air Conditioner Repair: Unit makes odd noise and/or cycles off and on.
- Outdoor unit is likely dirty and needs cleaning. Wash from the inside out, or skirt the water off the coil to avoid pushing the dirt into the coil.
- Condenser fan could be worn out and cycling off and on.
- Contactors, Fan motors, and Compressors are all subject to wearing out and will produce more noise as they start to fail.
As you consider taking on the task of cleaning or replacing a part on your central air unit, you must be confident and familiar enough to do any service or repairs safely.
Also, any time the refrigerant or Freon is involved; you will definitely need the help of a professional HVAC contractor. Replacing or working with electrical components is also dangerous since components can discharge high voltage even after the power has been turned off.
Regular professional maintenance of your central Air Conditioning System will also help prevent issues like the above from occurring to begin with and as time goes on.
These tips are provided by Tradesman Mechanical Services Ltd.
“Your Comfort is our business”