30 Things PNW Homeowners Should Do Before A Long Summer Vacation

Before you hit the road for that long-awaited summer getaway with the family, take a few steps to make sure your home stays safe while you’re away. This checklist is designed specifically for homeowners in the Pacific Northwest, where temperate summers, surprise rain, and cooler nights can all pose unique challenges.

Whether you’re headed out for a weekend or a month-long adventure, here are 30 things you should consider doing to protect your home and avoid coming home to any costly surprises.

Home Systems to Prepare Before You Leave

Plumbing, Sewer, and Water System Prep

1. Turn Off the Main Water Valve

Before heading out, shut off the main water supply to your home, but only if you’re going away for more than 3–4 days. This is the single most effective way to prevent catastrophic leaks, burst pipes, or undetected water damage while you’re away. Especially important in older homes or homes with past plumbing issues. If your home has a smart water shutoff system, double-check that it’s functioning properly.

• The only exception is if someone will be entering your home to water plants, feed pets, etc. In that case, consider turning off water just to specific appliances (like the washing machine or toilets), or use a smart leak detection valve.

2. Put Your Water Heater in Vacation Mode or Shut It Off

Most tank-style water heaters have a “vacation mode” that reduces energy use while preventing the tank from freezing or overheating. If you’re gone for more than a week, it’s smart to either use vacation mode or turn the unit off at the breaker and shut off the cold water inlet.

• Less than 4 weeks: Use vacation mode (or turn the thermostat to low/off at the breaker)
• More than 4 weeks and want maximum energy savings: Turn it off and consider draining, but consult a plumber first—especially if it’s an older unit.

3. Shut Off Isolated Valves (Optional but Smart)

If you don’t want to shut off the main water supply, consider turning off supply valves to toilets, sinks, and washing machines. Toilets in particular can leak silently and a stuck flapper or failed fill valve can lead to a constantly running toilet or even an overflow, wasting water or causing serious damage while you’re away.

Pro tip: Before shutting off any valve, give it a quick check. If the valve is stiff, corroded, or hasn’t been touched in years, forcing it could cause a leak. If it turns easily, shut it off. If not, it might be safer to leave the main valve off instead and plan for a plumber visit later.

When to Shut Off Isolated Valves

• If you’re leaving for a week or more
• If you aren’t shutting off the main valve
• If appliances are older or rarely used

4. Run the Garbage Disposal

Our Pacific Northwest summers (mild temps + occasional humidity) can make leftover organic material rot and smell which can attract pests, like ants, gnats, and fruit flies which are common in the late summer. Running the garbage disposal clears out food particles, prevents mold and bacteria growth, and avoids future clogs from hardened debris sitting too long.

How to Prep Your Disposal Before Vacation:

• Run cold water for 10–15 seconds.
• Turn on the disposal and let it run until completely clear.
• Toss in ice cubes and a few lemon peels to help clean the blades and leave a fresh scent.
• Run cold water again to flush.

5. Wipe Down Kitchen Sink

The PNW is known for its moisture, even in the summer. Any leftover water in the sink or around the edges can invite mold, especially if there’s poor ventilation. Tiny crumbs or grease splatters can rot and cause lingering smells. Wiping the sink down ensures you’re not leaving behind anything. If you’re already cleaning the disposal, wiping the sink leaves a fresh, clean surface and removes any gunk around the drain opening.

6. Run and Empty the Dishwasher

Start a wash cycle the night before you leave and put them away in the morning, then leave the door cracked open so the inside dries. If you don’t have any dishes to wash, you can also run a cleaning cycle with white vinegar or a dishwasher cleaner before leaving for an extra fresh start.

Why You Should Run and Empty the Dishwasher Before Leaving

• Prevents Mold, Mildew, and Bacteria
• Eliminates Odors
• Avoids Pests
• Extends Appliance Life
• Avoids Dishwashing Surprises Upon Return

7. Take Out the Trash

Leftover trash, especially in the kitchen, is like ringing the dinner bell for pests and rodents. Even if the bag isn’t full, small scraps of food or coffee grounds can rot and mold quickly in summer heat, leaving your home smelling awful when you return.

8. Clean Out the Fridge and Pantry

This is one of the most important (and most forgotten) steps before leaving on a long summer trip. The pantry can be a hotbed for an ant invasion, and the fridge contains the items with a short shelf life that can rot, leak, or smell after just a few days, which is a guaranteed mood killer when you return from your vacation.

What to Do Before You Leave:

• Throw away milk, cheese, meat, leftovers, fresh herbs, and cut fruit or veggies.
• Check drawers and back shelves for anything you forgot was there.
• Wipe down sticky spots or spills that could turn into moldy messes.
• Don’t leave any fruit out on the counter!

9. Perform a Quick Sewer System Check

Checking your sewer system before leaving for a long summer vacation is a smart and often overlooked part of home prep, especially in older homes common in the Tacoma/Seattle area where tree roots, heavy rainfall, or aging pipes can quietly create issues.

Before You Leave:

• Run water in all drains (sinks, tubs, showers) for 10–15 seconds to fill traps
• Flush all toilets and ensure they stop running normally
• Check for gurgling sounds or slow drainage and address them before leaving
• Pour a cup of water with a teaspoon of cooking oil down seldom-used drains — it helps seal in moisture longer
• If you notice odors, consider scheduling a professional inspection or drain cleaning

Electrical System & Fire Safety

9. Unplug Major Appliances and Electronics

Unplugging major appliances and electronics before a long summer trip is a simple but powerful way to protect your home from fire risks and save money, by preventing phantom energy usage. It’s especially wise in the Pacific Northwest, where occasional power surges, summer thunderstorms, or grid fluctuations can damage appliances, and unplugging them eliminates the risk completely.

What to Unplug Before You Leave:

• TVs and home entertainment systems
• Computer, monitors, and printers
• Microwaves, toasters, coffee makers
• Washer and Dryer
• Air purifiers, fans, and portable window AC units

10. Turn Off or Set Certain Breakers

Think of this step as “vacation mode for your whole panel.” It’s optional — but for many, especially with older homes or frequent power blips, it’s a smart precaution. Turning off breakers cuts power completely to select circuits, which is helpful for major appliances or areas of the home you won’t use, like garages, guest rooms, or outdoor lighting.

What Not to Turn Off:

• Refrigerator breaker (unless it’s been emptied and cleaned)
• Security system or smart home breaker
• Internet/modem breaker, if you rely on remote monitoring via cameras, leak detectors, smart thermostats
• HVAC use the vacation setting, instead of flipping the breaker
  

11. Unplug Outdoor Electrical Items

Don’t forget extension cords, patio lights, or garden equipment left plugged in outdoors. These pose a serious fire and shock hazard in summer storms. Also close any outlet covers securely and ensure GFCI outlets are functioning before you leave. A quick test with the built-in button can prevent issues while you’re gone.

Need help with outdoor electrical safety? The licensed electricians at Harts are here to inspect, repair, or upgrade your exterior outlets, lighting, and breakers so you can leave home worry-free.

What to Unplug Outside:

• String lights or decorative lights
• Landscape lighting transformers
• Electric grills and smokers
• Water features and pond pumps
• Extension cords
• Bug zappers and patio heaters

12. Inspect Extension Cords and Surge Protectors

If anything looks frayed, overloaded, or daisy-chained, unplug it. These are a leading cause of residential fires, and are an easy fix. Unplug and replace anything questionable before your trip. And if you’re unsure schedule a Harts’ licensed electricians to perform and electrical safety inspection.

What to Look For:

• Frayed or pinched cords
• Burn marks or melted plastic
• Loose or bent prongs
• Cracked casings or worn outlets
• Surge protectors that are older than 3–5 years or show no indicator light

13. Test Smoke and Carbon Monoxide Detectors

A quick test ensures all alarms are working properly, so you can enjoy your trip knowing your home is protected. If an electrical issue, lightning strike, or faulty appliance causes a fire while you’re gone, your detectors are your first line of defense. Even if no one is home, a working smoke detector can alert neighbors or a monitoring system in time to prevent total loss.

How to Perform a Test:

• Press the test button on each smoke and CO detector, and you should hear a loud beep
• If there is no sound, or it’s weak, then replace the batteries
• Make sure detectors are less than 10 years old
• If your home has monitored alarms, verify that they’re communicating properly

14. Use Smart Plugs or Timers for Lights

Using smart plugs or timers for lights is a simple yet effective way to make your home appear occupied while you’re away, helping to deter potential break-ins. Set key indoor lamps or porch lights to turn on and off at different times to mimic daily routines. With smart plugs, you can even control your lighting remotely for added security and peace of mind during your summer vacation.

How to Set It Up:

• Plug lamps into smart plugs or wall timers, in key areas like: the living room, hallway, bedroom
• Set timers to turn lights on/off at different times each evening
• For porches, use dusk-to-dawn sensors or smart bulbs with remote control

Pro Tip: For an extra layer of security, pair smart plugs with motion-activated cameras or door sensors — and if you need help setting them up safely, Harts’ electricians can make sure your wiring and outlets are ready for smart tech.

HVAC System & Climate Control

15. Don’t Shut Off Your HVAC System Completely

Don’t shut off your HVAC system completely before leaving for a summer trip. Even in the Pacific Northwest’s mild climate, a sealed home can become humid, leading to mold, mildew, and potential damage to wood or finishes. Keeping your system on at a higher temperature helps control moisture, protect electronics and appliances, and maintain air quality. It also prevents strain on your system when restarting after a long shutdown.

What to Do Instead:

• Set the thermostat around 80°F while you’re away — warm enough to save energy, cool enough to protect the home.
• Keep HVAC in “Auto” mode — not completely off — to circulate air as needed.
• Use a smart thermostat if available to monitor and adjust remotely.

Pro Tip: If your HVAC hasn’t had a seasonal tune-up, schedule one before your trip. Harts’ licensed technicians can inspect and prep your system to run efficiently while you’re away — and prevent issues when you return.

16. Adjust Your Thermostat

Before leaving for your trip, take a moment to adjust your thermostat to keep your home efficient and protected. Set it to run in “Auto” mode so it circulates air only when needed, and review any scheduled settings to prevent unnecessary cooling while you’re away. If you have a programmable or smart thermostat, update the settings or enable remote access so you can monitor and adjust the temperature from your phone. Keeping interior doors open helps maintain airflow, and closing blinds or curtains will reduce heat from sunlight and help your home stay cooler naturally.

17. Use Smart Thermostats for Remote Control

Smart thermostats are a great way to monitor and adjust your home’s temperature while you’re away. With remote access from your phone, you can make real-time changes based on weather shifts or unexpected heatwaves in the Pacific Northwest. Many models also offer energy-saving tips, humidity tracking, and alerts if your system malfunctions — giving you added peace of mind during your summer vacation.

Pro Tip: If your current system is compatible, Harts can install a complete smart HVAC setup — including a smart thermostat, zoning controls, and air quality monitoring — so you can manage your home’s comfort and efficiency from anywhere. It’s the perfect upgrade for peace of mind while you’re away and energy savings all year long.

18. If You Have a Mini Split, Set to Dry Mode or Cool Mode Low

If you have a ductless mini split system, set it to Dry Mode or Cool Mode on a low setting before leaving for your trip. Dry Mode helps control humidity without running the system constantly, which is ideal for the Pacific Northwest’s mild but sometimes damp summers. If your unit doesn’t have a Dry Mode, setting it to Cool Mode at a higher temperature (around 78–80°F) will keep air circulating and prevent moisture buildup while using minimal energy.

19. Replace Air Filters Before You Leave

Replacing your air filters before leaving for a summer trip is a simple way to keep your HVAC system running smoothly while you’re away. In the Pacific Northwest, where dust, pollen, and humidity can still affect your home even when it’s unoccupied, a clean filter helps maintain proper airflow, control moisture, and prevent dust buildup. It also reduces strain on your system, lowering the risk of breakdowns while you’re gone.

Smart Extras for a Worry-Free Return

Even if your plumbing, electrical, and HVAC systems are covered, there are still a few more smart steps worth taking to keep your home secure and stress-free while you’re away. These simple tasks can help prevent unpleasant surprises, deter break-ins, and make sure everything is just the way you left it when you return.

General Security & Final Travel Prep

20. Lock All Windows and Doors

Even if you rarely use a certain window, double-check that it’s securely locked. Sliding doors and basement windows are common entry points for intruders. Also consider placing a dowel or bar in the track of sliding doors for added security.

21. Pause Mail, Newspapers, and Deliveries

Overflowing mailboxes or packages left on the doorstep are clear signs that no one’s home. Either pause mail delivery through USPS or ask a neighbor to collect it.

22. Store Vehicles Securely

If you’re leaving a vehicle at home, lock it and remove any valuables. Consider parking it in the garage or driveway with lights on a timer to create the appearance of activity.

23. Water Plants or Prep for Care

Water houseplants thoroughly before leaving or set up a self-watering system. If you’re gone for more than a week, ask a neighbor or friend to stop by.

24. Clear and Vent Washer & Dryer

Before you leave, remove any damp clothes or linens from the washer and dryer to prevent musty smells or mold. Wipe down the drum if needed, and leave the doors slightly open to let air circulate. Front-loading washers in particular are prone to mildew when closed for long periods, especially in humid summer conditions.

25. Turn Off Ceiling Fans

They don’t cool empty rooms and could run unnecessarily, wasting electricity or risking wear while you’re gone.

26. Prep for Pets

If pets aren’t traveling with you, confirm boarding details or pet-sitter instructions, including emergency contacts, medication, and feeding schedules.

27. Bring in Your Trash & Recycle Bins

Leaving your bins out while you’re away is a clear signal that no one’s home, especially if collection day comes and goes without them being moved. Bring them in before you leave, or ask a neighbor to do it for you after pickup day.

28. Snap Pictures of Household Appliances

Before you leave, take quick photos of your stove, oven, thermostat, and any unplugged appliances. This gives you peace of mind mid-trip when you suddenly wonder, “Did I turn that off?” Having visual confirmation can help ease anxiety and let you enjoy your vacation without second-guessing.

29. Let a Trusted Neighbor or Friend Know

Before heading out, let someone nearby know you’ll be away and how to reach you in case of emergencies. Ask them to keep an eye on your home, bring in unexpected packages, or check for anything unusual. It’s also smart to share your itinerary and provide a spare key if you trust them — just in case.

30. Morning Of: Empty the Coffee Pot

Don’t forget to empty any leftover coffee and grounds into a bag and take it out with the trash, you don’t want it sitting in the house while you’re gone. Stale coffee and damp grounds can grow mold and create strong odors, especially in a sealed coffee maker. Give the pot and basket a quick rinse the morning of your trip to keep your kitchen fresh.

Ready to Head Out? Let Harts Help First

Before you lock the door and head off on your summer getaway, make sure your home’s essential systems are in top shape. From checking your HVAC and water heater to inspecting outlets, outdoor wiring, and valves, the team at Harts is here to help. Schedule a pre-trip service with our licensed technicians and leave with confidence, knowing your home is safe, efficient, and vacation-ready.