When to replace home appliances and systems: a lifespan guide

The most expensive home repairs are the ones that surprise you. A furnace that quits in January or a water heater that floods the basement feels like bad luck, but most major systems fail on a fairly predictable schedule. If you know roughly how long things last, you can budget for them, watch for the warning signs, and replace on your terms instead of in an emergency.

Here is a lifespan guide for the big-ticket items, plus a simple rule for deciding whether to repair or replace.

How long home systems and appliances last

These are typical ranges. Hard water, heavy use, climate, and maintenance all shift them, but they are a solid planning baseline.

Asphalt shingle roof: 15 to 30 years.
Furnace: 15 to 20 years.
Air conditioner or heat pump: 10 to 15 years.
Water heater (tank): 8 to 12 years.
Water heater (tankless): 18 to 20 years.
Dishwasher: 9 to 12 years.
Refrigerator: 10 to 15 years.
Washing machine: 10 to 12 years.
Clothes dryer: 10 to 13 years.
Range or oven: 13 to 16 years.
Garbage disposal: 8 to 12 years.
Sump pump: 7 to 10 years.
Garage door opener: 10 to 15 years.
Exterior paint: 5 to 10 years.
Carpet: 8 to 10 years.

Maintenance genuinely extends these. A water heater you flush every year, or a furnace you service every fall, will reach the top of its range instead of the bottom.

The repair-versus-replace rule

When something breaks and it is near the end of its life, use the 50 percent rule. If the repair costs more than half the price of a new unit, replace it. A pricey repair on an old appliance usually just delays the replacement by a year while you spend money you could have put toward the new one.

Two more questions help:

Is it still under warranty? If so, repair, and check coverage before you pay for anything.
Is it much less efficient than a new one? An old furnace or refrigerator can cost enough in energy that a new one partly pays for itself.

Watch for the warning signs

Most systems warn you before they quit. Pay attention to:

Rising energy bills with no other cause, a sign of a system working too hard.
New noises: rumbling, grinding, banging, or short cycling.
Repairs that are getting more frequent, the classic sign the end is near.
Rust, leaks, or visible corrosion, especially on a water heater.

Budget before it breaks

The whole point of knowing lifespans is to never be caught off guard. Note the age of your major systems, look at which ones are within a few years of the end of their range, and set aside money for them. A new roof or furnace you saw coming is a project. The same one at midnight in a storm is a crisis.

Keep the ages and warranties in one place

You can only plan for replacements if you know how old everything is, and that information lives on a sticker in the basement that you will never remember to check. HomeAlmanac keeps the install date, expected lifespan, and warranty for each appliance, then flags the ones approaching the end of their service life so you can budget ahead. It is the difference between planning a replacement and panicking over one.

Knowing what lasts how long turns the scariest part of owning a home into a line in a budget. That is a trade worth making.

Looking for a specific number? Our appliance lifespan chart lists typical service life for 27 appliances and home systems in one place.