Winter AC care for Phoenix homes

Winter is when you forget the air conditioner. That is the problem.

From December into February, the condenser beside your house goes silent. You stop hearing it, then you stop thinking about it, and by March you could not swear it is still there. The desert has a better memory. An idle outdoor unit is sheltered, quiet and full of wiring, which makes it prime real estate for a neighbor that was chewing on Arizona long before Arizona had anything electric to chew.

The University of Arizona's Cooperative Extension describes woodrats, better known as pack rats, as "notorious for chewing wiring of cars and appliances." They favor desert scrub, which is a polite way of describing a good share of the Phoenix metro. A wire chewed in January hurts no one in January. It waits for the first hot afternoon in April, when you switch to cool and nothing happens.

Do not wrap the unit like a holiday present

Every winter, someone buys a snug vinyl cover for the condenser and feels responsible. In colder climates, covers keep ice and snow off. Phoenix has no such problem, and a cover that seals the unit can hold moisture against the cabinet and give rodents exactly the dark, sheltered spot they were looking for. Leave it uncovered. If falling debris from a tree is the worry, ask us about a breathable, top-only guard.

If your air conditioner is also your heater

Many Valley homes heat with a heat pump, which means the outdoor unit does not rest in winter at all. Never cover a heat pump. On a cold morning it may frost over, pause, and release a cloud of steam. That is the defrost cycle, and it is normal. What is not normal: ice that stays, a unit that runs constantly without warming the house, or a power bill that suggests the backup heat strips are doing all the work. That is when to book heat pump repair.

Winter is the smart season to decide about replacement

If last summer ended with a repair estimate that made you wince, winter is the time to think it over. Nobody makes a good decision about a fifteen-year-old system at nine o'clock on a July night with the house at 92 degrees. In winter you can compare options with a clear head, schedule the installation when indoor comfort is not at stake, and read the fine print instead of signing it. Start with what a new AC costs, then look at AC installation and financing.

Phoenix winters are short, and lately unreliable

Sky Harbor's normal January high is 67.6 degrees. Normal is a generous word lately: February 2026 averaged a high of 80.0 degrees, the warmest February in Phoenix records going back to 1896, according to the National Weather Service. An air conditioner can be called back to work with very little notice. A winter check means it answers.

Already had a fall AC check and see no sign of visitors? You may not need a winter visit at all. We would rather tell you that than sell you one.