At Wolff Mechanical, we work hard to help with all your Scottsdale air conditioning repair needs. Today we wanted to provide some troubleshooting advice for home maintenance. There are always certain solutions to every problem related to the air conditioning unit that may be solved without calling a technician to repair the system. Below we have listed possible solutions to help if the air conditioner does not turn on or if you seem to be facing a cooling issue with the air conditioning vents. If these problems are not solved with the troubleshooting tips below, call us at Wolff Mechanical and we will gladly send someone to the home to fix these two issues!


PROBLEM: Air Conditioning System Will Not Turn On

Possible Causes:
If you cannot get the air conditioning system to activate at all, then the most common causes lie with a blown circuit breaker or fuse, improperly set or faulty thermostat or an internal switch being off.

Possible Solutions:

  • Ensure the thermostat itself is in the “Cool” position and not set to “Off” or “Heat.”
  • Ensure the thermostat is calling for cooling by making sure the thermostat is set below the current room temperature.
  • Check that the 240 volt circuit breaker (double breaker) controlling the air conditioning compressor / condensing unit and the 120 volt circuit breaker controlling the furnace blower or separate air handler, are in the “on” positions. If a circuit breaker has popped or a fuse is blown, then reset the circuit breaker or replace the fuse. If you reset the breaker or replace the fuse and they fail again, stop and call an air conditioning service technician as you may have a more serious problem.
  • Check that all switches in and around the air conditioner are set to the “on” position including the external safety switch which is usually on an outside wall next to the condensing unit.
  • Check the condensate overflow tray (if your unit has one) for excessive water. Sometimes this tray is installed in remote air handlers using condensate collection instead of a condensate drain. When using a tray, there may be a sensor switch that turns the unit off when water collects in the tray.
  • Check to make sure the blower door on the air handler is securely closed.

PROBLEM: Poor Air Flow from Cooling Vents in Rooms

Possible Causes:
Usually poor air flow results from a dirty air filter or ductwork that has become blocked, crimped or even disconnected.

Possible Solutions:

  • Confirm air filter is clean. If dirty, clean or replace the air filter.
  • Visually inspect all ductwork to make sure it has not become disconnected or crimped. This includes ductwork that may be in difficult to reach attic, basement or crawl spaces. Repair or connect as needed.
  • Check register dampers on vents in the rooms to make sure they are set to an open position.

To read the full article click here: Repairing a Central Air Conditioning System