AC & heating repair in Mountainside, NJ: we connect you with top-rated local HVAC pros, checked by our team — their proposals come straight to your Homeshi account. Free for property owners.
In Mountainside, July highs average about 86°F and January lows about 24°F.
In Union County, July highs average about 86°F and January lows about 24°F, with roughly 48 inches of rain a year.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, flash floods and floods in Union County, with hail up to 1.25 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in Union County was built around 1950, about 76 years ago, and 86% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
Union County has had 16 federal disaster declarations in the last 25 years, most often for hurricanes; the latest was Remnants Of Hurricane Ida (2021).
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Book the AC tune-up in spring and the heating check in fall, before the first real heat or cold — repair slots fill fast in a heat wave.
Central AC units usually last 12–15 years and furnaces 15–20; past that, a repair often costs more than it saves.
If the system is over 12–15 years old or needs a major part (compressor, heat exchanger), ask for both prices — the pro sends them on Homeshi so you can compare.
These are Union County figures — more about homes in Elizabeth.
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