Even though several things can affect a furnace's operation, heating repair calls tend to center on a few common problems. Most of them can be fixed without much delay, though there are a few exceptions to the rule. Here are some of the issues that are commonly seen and what is likely to be needed to rectify them:
1. The furnace won't come on. This problem is commonly caused by a failed safety mechanism. These mechanisms are meant to keep the furnace from running under unsafe conditions. An unlit burner or a failed fan would qualify as unsafe. After enough time, however, the safety mechanism itself can fail. When this happens, the default is to keep the furnace from running so that safety is maintained. The repair is simply to replace the failed mechanism with one that can properly sense the condition that it's meant to monitor.
2. The furnace runs, but the area doesn't get hot enough. In older furnaces, this typically results from an airflow problem. Either the filter is too clogged with dirt to allow for adequate air intake or the blower fan needs oiling. Both of these are simple fixes. In new furnaces, however, it can also signal a problem with the heat exchanger. This can be more expensive to replace or repair. Fortunately, heat exchangers typically last for many years.
3. The furnace doesn't come to the right temperature. It may shut off too soon, too late, or not at all. Alternatively, it may fail to start. All of these things can be caused by a failed thermostat. Replacing the part solves the problem.
These are just some of the things that can cause the need for heating repair. If your furnace isn't doing what it's supposed to, call your local Reston VA heating service provider today.
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