The home maintenance nobody tells you about

Nobody hands you a list when you get the keys. You learn about the sump pump when the basement floods, and about the dryer vent when a neighbor's house catches fire.

Most of what follows takes ten minutes and a garden hose. None of it needs a tool you don't already own, except a fin comb, which costs about six dollars. The reason these items get skipped isn't difficulty — it's that no one ever mentioned them.

Start with the outdoor AC unit

That metal cage outside is a radiator. Cottonwood, grass clippings, and dust mat into the fins, the unit can't dump heat, and it runs longer and hotter to do the same job. It is the most common reason a perfectly functional air conditioner "isn't keeping up" in August.

Kill the power at the breaker and the disconnect box on the wall beside the unit — both, not one. Pull the leaves out of the top by hand. Then rinse the fins with a garden hose until the water runs clear, working from the inside out if you can get the top off.

Do not use a pressure washer. It folds the fins flat, and folded fins block airflow permanently. You will have made the problem worse in a way you cannot undo with a hose.

Once a year, in spring. Twice if you have cottonwood.

Monthly, and it's five minutes total

Test your GFCI outlets. Press TEST, it should pop; press RESET. They fail silently, and a dead one looks exactly like a live one. The whole point of that outlet is to work on the worst day of your life, and it can't do that if it died three years ago.

Run water in the drains you never use. Guest bathroom, floor drains, the basement sink. Every drain has a U-shaped trap holding a little water, and that water is the only thing between you and the sewer. When it evaporates, sewer gas comes up. If you have ever chased a mystery smell in a room nobody uses, this is usually it.

Look at the furnace filter. Everyone knows. Almost nobody does it monthly.

Quarterly

Flush the AC condensate drain line. Your air conditioner pulls water out of the air, and that water leaves through a small pipe. Algae grows in it. When it clogs, the water backs up into the pan and then into your ceiling or your floor. A cup of vinegar down the access tee, or a shop vac on the outdoor end, prevents a genuinely expensive repair. Almost nobody does this one.

Test the sump pump by pouring five gallons into the pit. If it doesn't kick on, you would rather learn that now than at 2am during a storm.

Check the garage door safety reverse. Lay a 2x4 flat under the door and close it — it must reverse on contact. Then wave your hand through the photo eyes near the floor. Both should stop it. This is a thing that protects small children and gets tested approximately never.

Once a year

Clean the whole dryer vent, not the lint trap. Disconnect the duct at the back of the dryer and clean the entire run to the outside, then confirm the exterior flap actually opens when it's running. This is a real cause of house fires, not a theoretical one, and the lint trap is not the part that matters.

Vacuum the refrigerator coils — back or underneath the kick plate.

Pull the dishwasher filter. Twist out the cylinder in the bottom. Most people have never looked, and what's in there explains a lot about how the dishes have been coming out.

Exercise the main water shutoff. Turn it fully off and fully back on. Valves that sit untouched for a decade seize, and you discover this during the emergency where you need it — which is the worst available time to learn where it is and whether it works.

Look at your bathroom exhaust fans. Pull the cover, vacuum it, and confirm the duct actually goes outside rather than dumping into the attic. A surprising number don't, which is how you get mold above your bathroom ceiling.

Shut off and drain the hose bibs before the first hard freeze.

Every few years, and these are the ones nobody knows

The water heater anode rod. There is a sacrificial metal rod inside your tank that corrodes so the steel doesn't. It's about thirty dollars, it's replaceable every three to five years, and doing it can roughly double the life of a fifteen-hundred-dollar appliance. Most homeowners live in a house for a decade without learning this part exists.

Washing machine hoses, every five years, or switch to braided stainless and stop thinking about it. A burst supply hose runs at full pressure until someone comes home. It is one of the larger claims your insurance company sees, and it happens when the house is empty.

Your smoke and carbon monoxide detectors expire. Not the batteries — the units. Smoke alarms at about ten years, CO at seven to ten. There's a manufacture date printed on the back. A fresh battery in a fourteen-year-old detector is a decoration.

Caulk and exterior seals, and where your water goes. Downspouts should discharge at least a few feet from the house and the soil should slope away from it. A lot of what gets diagnosed as a foundation problem started as a drainage problem.

About flushing the water heater

You'll read everywhere that you should flush your water heater annually, and you should — but there's a caveat that rarely comes with the advice.

On an old tank that has never been flushed, draining it can create a leak you didn't have. Usually it's not the tank, it's the drain valve: most are cheap plastic, and sediment gets into the seat when you open it so it won't seal when you close it. Sometimes the valve clogs partway through and you can neither finish nor stop.

So: if the heater is newer, or you've flushed it before, flush it. If it's ten or more years old and has never been touched, a lot of plumbers will tell you to leave it alone — you can't recover the life you've already lost, and you might bring the failure forward.

If you do it, leave the cold supply on and let it run out the drain for a few minutes rather than fully draining and refilling. You get most of the benefit with no thermal shock. And while you're there, replace the plastic drain valve with a brass ball valve. That's the upgrade that makes every future flush trivial.

Do it on a Saturday morning, not a Sunday night. If something is going to fail, you want it failing on a day someone answers the phone.

What to leave alone

Gas line work, anything inside the electrical panel, refrigerant, and the inside of a chimney or flue.

The rule of thumb: if failure means fire, carbon monoxide, or electrocution, the diagnosis can be yours but the repair shouldn't be. Knowing what's wrong is worth a lot when you call someone — it's the difference between "it's broken" and "the condensate line is clogged."