A window air conditioner can provide the much-needed relief you need when the temperature rises, especially in homes without central air.

3. A window air conditioner can provide the much-needed
relief you need when the temperature rises, especially in
homes without central air. To ensure you stay cool all
summer long it’s important to know how to troubleshoot
some common problems with the unit. You may not be
able to fix every problem, but at the very least have an
understanding of what the problem could be. From that
point you can decide whether you need to repair the unit
or purchase a new one.

4. First thing to do if you’re A/C unit won’t turn on is to
check for power. Is the air conditioner plugged in? If so,
test the outlet by plugging another appliance in to that
same outlet. If the outlet is receiving no power, check your
circuit breaker.
If the A/C is receiving power but still doesn’t turn on,
there are a number of issues that could be wrong and
would require repair including the wiring, thermostat,
compressor, selector switch or control board.

5. This is a common complaint and why it’s important to
purchase the right BTU size air conditioner for the space
you are trying to cool. Check your BTU size here to see if
you purchased the right size for your space. You may need
a new air conditioner with a larger BTU size to get the job
done.
If you have the right size BTU use a thermometer to get
the temperature of the room and compare that to the
temperature you want it to be.

6. If there is a 15 degree difference you may be asking the
unit to do more than it is capable of. Try resetting the
temperature to 10 degrees lower than the room
temperature.
If the difference with the thermometer is less than 15
degrees, check the air damper. If it is open it will bring in
outside air and this is bad for the unit’s efficiency. Check
your back cover also, many people forget to remove this
cover after the winter season.

7. Lastly check the condensing coils, which are located on the
warm end of the A/C unit. Remove the air conditioner cover
to access the coils and clean them with a soft brush.

8. If you’re not feeling any cold air coming from the unit
but the fan is blowing, make sure the thermostat is set
appropriately first. Next check the compressor motor,
which is a small case inside the air conditioner. If it is
humming continuously, it could be the condenser,
evaporator or compressor, all of which would need
service from a professional.

9. If you find your A/C unit is leaking water this could
be a sign that it wasn’t installed properly. Re-check
the manual’s installation instructions to be sure the
installation was done correctly. Most likely you may
just need to tilt the unit back slightly to allow water
to run off.

10. If you have consistent problems with your A/C unit
and you have gone through all the troubleshooting
steps, the unit may need service from a professional or
you it may just be time for an upgrade. An average
window air conditioner has a life span of 8 years, and
this varies on how often it is used and how well you
maintain the unit.
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