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Three Signs Your AC Unit May Break Down

We’re well into the heat of summer. After last year’s record-breaking heat, now is the time to make sure your AC unit won’t fail when you need it most. Detecting an impending breakdown isn’t always possible for homeowners, but many AC units do begin to show some signs that they’re about to leave you with some uncomfortable days and sleepless nights.

If you suspect that your AC unit is breaking down, call John Nugent & Sons at 703-291-1926 for repair or replacement service in Northern VA.

AC Breakdown Warning Signs

Here are three of the most common signs that your AC system may be on the verge of a breakdown:

Weakening or Lower than Normal Airflow

If you notice a decline in the airflow of your AC unit, the first things to check are your air filter. If your air filters are heavily clogged, they will reduce the airflow in your home and place unnecessary strain on your entire system. Weak airflow can also be caused by a damaged blower or some other problem that most homeowners can’t detect or rectify themselves. If you replace your air filter and continue having airflow problems, it’s best to contact your local Northern VA HVAC technician to inspect your system, which can prevent more costly AC repairs down the road.


AC units are made to operate quietly and efficiently. If your AC system is making more noise than usual, there could be a problem with your fan belt, which can compromise your system’s efficiency. This is another instance when you should contact a heating and air conditioning expert to locate the source of the noise and correct the problem.

Not Cooling as Quickly as it Used to

This is one of the most easily detectable signs that your AC unit may be on the verge of breaking down. Your unit may be low on coolant, which is a relatively easy fix—but there are a number of other potential causes that aren’t so easy to repair. For instance, some AC units can rust and corrode over time. A qualified HVAC technician can evaluate your entire system and pinpoint the cause of your system’s poor performance.

If you notice anything out of the ordinary about your AC unit, call us today. We’re a family owned and operated company that has been proudly serving Fairfax, Arlington, Centreville, Reston, and the entire Northern VA community since 1975.

Also, keep in mind—in case you do need to replace your unit, there is an excellent AC tax credit available for the purchase and installation of an efficient air conditioning system.

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