DIY Tips From the Warner Service Blog

12 Legitimate Reasons Why Your Air Conditioner Isn't Working

Posted by Warner Service on Jul 24, 2018 9:00:00 AM

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An air conditioner breakdown in the middle of July is the worst, but why did that happen? You'll hear lots of reasons about why the A/C stopped working, but Warner Service is here to end the conversation. This is a comprehensive, end-all-be-all list of why the air conditioning broke down.

  1. The air conditioner isn’t plugged in. Before you call us, make sure that the power is working.
  1. The weather outside is too hot. The air conditioner can't function when the weather is more than 100 degrees Fahrenheit. On scorching days, reaching 62 degrees Fahrenheit in your home is hard.
  1. The A/C outside fan stopped working. This piece handles the flow between outside air and your home. If it’s not working, cool air won't go into your home and/or the compressor could blow. Get a replacement part.
  1. The A/C has a faulty motor, compressor, or wiring. This is a problem for HVAC professionals, so call us before everyone melts.
  1. The air conditioner isn’t the right size. Many homeowners don’t know this, but you need the right size air conditioner for your home. Improper sizing causes inadequate home cooling, so talk to a professional about which size air conditioner is right for your home.
  1. The air conditioner fuse blew, or the circuit breaker tripped. This causes the condenser to stop running.
  1. The air conditioning has dirty coils. Air conditioners suck heat out of the air to cool it. They don’t add coolness to the air. Dirty coils bring bacteria into your home, and build slime that can’t absorb the heat. Clean the coils as soon as possible.
  1. The programmable thermostat isn’t set. The thermostat and air conditioning depend on each other. Lower the thermostat about 5 degrees Fahrenheit to see if the air conditioner kicks on.
  1. The air conditioner is old. Even the best A/C units last between 7 to 10 years.
  1. The evaporator or condenser is dirty. If the air conditioner works but shuts off and/or doesn't cool, the evaporator is dirty. Clean it, and then let the air conditioner run for a few hours.

    If the air conditioner is running without cool air, check the condenser, which could be blocked or dirty. If so, remove the debris and try again.
  1. The thermal expansion valve (TXV) stopped. The TXV is like a needle that moves back and forth to allow refrigerant to pass. If it’s not moving, neither is the flow of the air conditioner.
  1. The air ducts are leaking. This is the biggest waste of energy in homes. Air duct leaks waste cool air and bring debris into your home. Call an HVAC technician to take a look.

Homeowners can troubleshoot most of these cooling problems with cleaning and inspection. When a bigger problem is at hand, like a faulty part that needs replacement, contact Warner Service.

In the meantime, download our HVAC Maintenance Checklist by clicking on the button below: 

Download Our HVAC Maintenance Checklist

Topics: Air Conditioning, HVAC, Maintenance, Do-It-Yourself