🔧 Keep It Running
If it ain't broke, don't replace it. And when it does break, a repair is usually the cheaper, smarter move — here's how to know which is which.
How long should it actually last?
Before you decide anything, find out where your machine is in its life. These are the widely-cited averages from the NAHB study of home-component life expectancy — well-maintained units routinely beat them, and neglected ones fall well short.
| Appliance | Typical lifespan | What kills it early |
|---|---|---|
| Refrigerator | ~13 years (10–15 typical, 20+ possible) | Filthy condenser coils; door seals that no longer seal |
| Gas range / oven | ~15 years | Spills into burners and igniters; broken door hinges |
| Electric range / oven | ~13 years | Burnt-out elements (cheap to replace); failed control boards |
| Washing machine | 10–13 years | Overloading; unlevel feet; never cleaning the drum or filter |
| Clothes dryer | 10–13 years | Clogged vent ducts — also the #1 dryer fire cause |
| Dishwasher | ~9 years | Clogged filter and spray arms; hard-water scale |
| Microwave | ~9 years | Door switches; running it empty |
| Water heater (tank) | 8–12 years | Never flushing sediment; a spent anode rod |
| Furnace / boiler | 15–25 years | Never changing the filter; no annual service |
| Central AC / heat pump | 12–18 years | Dirty filters and coils; blocked outdoor unit |
| Roof (asphalt shingle) | 15–30 years | Clogged gutters; unaddressed small leaks |
| Water heater (tankless) | ~20 years | No annual descaling in hard water |
Premium brands (Sub-Zero, Wolf, Miele and similar) commonly run 20 years or more. Budget lines often land at the low end of these ranges.
The 50% rule — repair or replace
1Get a repair quote with a real number
Most independent techs charge a diagnostic fee — often $75–$150 — and many credit it toward the repair if you go ahead. Ask on the phone whether they do. Ask for the part cost and labor separately.
2Apply both halves of the rule
Replace only when both are true:
- The appliance is past 50% of its expected lifespan (see the table above), and
- The repair costs more than 50% of a new comparable unit.
If only one is true, repair. An 8-year-old washer needing a $400 repair when a new one is $700 meets both — replace. That same $400 repair on a 3-year-old washer? Repair it, easily.
3Adjust for the things the rule ignores
- Repeat failures. Third repair in two years on the same machine — stop pouring money in.
- Energy hogs. A pre-2000 refrigerator or a failing furnace can cost enough per year in electricity or fuel to justify replacement on its own.
- Safety. A cracked heat exchanger, a gas leak, or scorched wiring is a replace-or-professionally-repair situation, full stop. Never nurse those along.
- Delivery, haul-away and install are real costs on the "new" side of the math — include them.
- Old machines are often better built. A 15-year-old direct-drive washer with a $90 part is frequently a better machine than a new $700 one with a control board.
The maintenance that actually extends life
Not busywork. Each of these is a documented, common cause of premature failure.
| How often | Do this | Why it matters |
|---|---|---|
| Every load | Clean the dryer lint screen | Restricted airflow burns out heating elements — and starts fires |
| Monthly | Check / change the furnace & AC filter | The single cheapest way to protect a heating and cooling system |
| Monthly | Clean the dishwasher filter and wipe the door gasket | Stops smells, poor cleaning, and pump strain |
| Monthly | Run a hot empty wash with vinegar in the washer; leave the door ajar | Prevents the mildew and buildup that ruins seals |
| Quarterly | Vacuum the refrigerator condenser coils (back or underneath) | Dirty coils make the compressor run constantly — the #1 fridge killer and a real power bill |
| Quarterly | Test smoke and CO detectors; replace batteries yearly | Not about lifespan. About your life. |
| Twice a year | Clean the dryer vent duct, not just the screen | Adds years to the dryer and removes a leading house-fire cause |
| Twice a year | Clean gutters and downspouts | Overflow rots fascia, soaks walls and floods basements — a roof-and-foundation problem disguised as leaves |
| Yearly | Flush a few gallons from the water heater tank | Sediment insulates the burner, wastes fuel, and cracks tanks |
| Yearly | Service the furnace or boiler before cold weather | Cheaper in September than an emergency call in January |
| Yearly | Check the water-heater anode rod (every 2–3 years after) | A $30 rod is what stops the tank itself from rusting through |
| Yearly | Rinse the outdoor AC condenser; clear 2 ft around it | Restricted airflow overworks the compressor |
| Yearly | Check appliance door seals with a dollar bill | Close the door on a bill — if it slides out easily, the seal is gone and you're paying for it monthly |
| Before freezing | Shut off and drain outdoor spigots | See the burst pipe guide for what happens if you don't |
Fixes most people can do themselves
Free to try, and they solve a large share of service calls.
Dryer won't heat / takes forever
Clean the lint screen, then disconnect and clean the whole vent duct and the outside flap. This alone fixes most "my dryer is dying" complaints. If it still won't heat, it's usually a thermal fuse or heating element — inexpensive parts.
Fridge not cold enough
Vacuum the condenser coils, check the door seals, make sure vents inside aren't blocked by food, and leave a few inches of clearance behind it. Cheap first steps before anyone charges you a diagnostic.
Dishwasher leaves grit / won't drain
Pull and rinse the filter at the bottom. Poke the spray-arm holes clear with a toothpick. Check the drain hose for a kink or a clogged garbage-disposal knockout plug.
Washer walks across the floor
Level it with the adjustable feet and stop overloading it. An unbalanced washer destroys its own bearings and can wreck a floor.
Running toilet
A $10 flapper or fill valve, 15 minutes, no special tools. A running toilet can waste hundreds of gallons a day — it shows up on the water bill fast.
Slow drain
Boiling water, then a drain snake or a plastic zip-strip tool. Skip the chemical drain openers — they damage older pipes and make a plumber's job harder and more expensive.
Oven won't heat (gas)
Usually a worn igniter — it glows but no longer gets hot enough to open the gas valve. A common, inexpensive part, though gas work is a reasonable place to call a pro.
Drafty, expensive house
Weatherstripping, door sweeps, outlet gaskets and caulk cost very little and pay back within a season. Free weatherization programs exist for income-qualified households — see the bills & repairs help hub.
Parts, manuals and diagnosis — mostly free
Find your model number first
Nothing works without it. It's on a sticker or metal plate:
- Refrigerator — inside, on a side wall or behind the crisper drawer
- Washer / dryer — under the lid, inside the door, or on the back
- Dishwasher — on the edge of the door, visible when open
- Range / oven — behind the bottom drawer or on the door frame
- Furnace / water heater — on the front or side panel
Photograph it. Then search that exact model number plus the symptom — appliance repair has an unusually good free video and forum ecosystem, and someone has almost certainly filmed your exact machine with your exact fault.
Where to get parts & manuals
- Parts retailers with free repair guides — RepairClinic, PartSelect, AppliancePartsPros and Repair Clinic all publish symptom-based diagnostic guides and part videos free, whether or not you buy from them.
- iFixit — free, community-written repair manuals for appliances, electronics, phones and tools, plus a right-to-repair advocacy arm.
- The manufacturer's site — owner's manuals and exploded parts diagrams are free downloads for nearly every appliance ever sold.
- Salvage & used-appliance shops — often sell pulled parts for a fraction of new. See Buy Used Smart.
- Repair cafés and tool libraries — volunteer-run events that fix your item with you, free. Search your city's name plus "repair café" or "tool library."
Don't get talked into a replacement you don't need
Ask these on the phone
- What's the diagnostic fee, and do you credit it toward the repair?
- Do you service this brand and model?
- Will you give me the part cost and labor separately, in writing?
- What's the warranty on the part and the labor?
Red flags
- Diagnoses your problem over the phone without seeing it, then pushes a new unit.
- Won't itemize, or only gives one all-in number.
- Pressures you to decide today.
- Cash only, no invoice, no license or business name.
- Sells appliances and repairs them, and always concludes you need a new one.
Verify the license before any significant work — we link the official state lookups on every listing. Find local help →