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Common AC Problem: AC Doesn’t Cycle On

September 19, 2018

During the summer, your air conditioner (AC) works harder and longer.  That high demand may cause a problem to rear its ugly head.  In this multi-part post, we’ll take a look at some of the most common AC problems, talk about the possible causes, and provide suggestions for tackling each problem.

AC Doesn’t Cycle On

If your AC does not cycle on, check to make sure it has power, that the circuit breaker has not been tripped, and that the thermostat is on and set to cool mode. If these check out, then here are some possible causes:

  1. System has frozen up: You might see ice on the inside or outside unit. This is typically a sign that there is a refrigerant leak (described above), but it could also be a sign that the ductwork is blocked or a dirty air filter. Turn the system off, turn the thermostat to fan, and wait for the ice to defrost, which may take several hours. Meanwhile, call an AC professional.
  2. Condensation (drip) pan is full: When condensate drips from the evaporator into the drip pan, the excess water should be carried away via pipes to the outside. If these pipes – the condensate lines – get clogged, a water float switch will automatically turn the AC unit off. If your unit is not equipped with a float switch, you will instead see water leaking from the around the drip pan. Dry out the drip pan and clean the condensate line. Refer to our post Clean Condensate Lines to Prevent Mold).

Avoid AC Problems

Summer can be the best time of the year, so don’t let air conditioning problems hinder you from enjoying it.  Be sure to get annual AC maintenance visits, so it will run efficiently and be ready for the high demand of the summer’s heat.  If you live in the Nashville area and experience any heating or cooling problems, call on Interstate AC Service at (615) 832-8500.