Heading out of town and wondering what to do with your water heater? For most homeowners, you don’t need to turn it off completely. The best choice is usually to set it to vacation mode or lower the temperature. This simple step saves energy while keeping your system safe and ready when you return.
Arizona’s mild winters mean frozen pipes aren’t a big concern, but water leaks and wasted energy can still be. Here’s how to prep your water heater before your next trip.
What Is Vacation Mode on a Water Heater?
Vacation mode is a built-in energy-saving setting on many gas and electric water heaters. It lowers the water temperature to around 50–60°F, which prevents the system from constantly reheating water you won’t use while still keeping the tank safe from bacteria growth.
- Gas water heaters: Turn the dial to “VAC” or “Pilot.” This keeps the pilot light on but stops full heating.
- Electric water heaters: Lower the thermostat to 50–60°F or turn the breaker off if you’ll be gone more than two weeks.
- Tankless water heaters: These heat only on demand and use almost no energy when idle. You can leave them on or unplug the unit.
If your heater doesn’t have a vacation setting, manually lowering the temperature achieves the same effect.
When Should You Turn My Water Heater Off Completely?
Turning your water heater off can make sense if:
- You’ll be gone longer than three weeks
- You’re also shutting off your main water supply
- You want to minimize the risk of leaks from older tanks
When you shut off your water supply but leave the heater on, pressure can build up inside the tank and cause damage. Always turn off both if you close the main valve.
In Arizona, there’s little risk of frozen pipes, so the main reasons to shut it off are safety and leak prevention, not freezing protection.
Step-by-Step: Preparing Your Water Heater Before Vacation
For Short Trips (1–2 weeks)
- Set your water heater to vacation mode or lower the temperature.
- Check for any small leaks or rust around the tank.
- Optionally shut off your main water supply if you want extra peace of mind.
For Longer Trips (3+ weeks)
- Turn off the water heater completely (follow the manufacturer’s instructions).
- Shut off the main water supply.
- Drain the tank if your manual recommends it.
- When you return, fill the tank completely before turning the unit back on and allow 30–60 minutes for water to reheat.
Frequently Asked Questions
Should I turn off an electric water heater while on vacation?
Yes, if you’ll be gone for several weeks. Otherwise, simply lower the thermostat or use vacation mode.
Does vacation mode waste energy?
No. It’s designed to maintain minimal heat levels and prevent bacteria without using full power.
How long can a water heater stay off?
You can safely keep it off for a month or more as long as you follow manufacturer instructions when restarting it.
Will turning it off affect water pressure?
No. Water pressure depends on your plumbing and main supply, not the heater.
Local Tip for Mesa Homeowners
Because Arizona’s water is extremely hard, sediment can build up in your tank while it sits unused. Scheduling a water heater flush before or after your trip helps extend its life and keeps it running efficiently.
Travel Confidently with a Safe Water Heater
There’s no single rule for everyone, but here’s the bottom line:
- Short trips: Use vacation mode or lower the temp.
- Long trips: Turn it off and shut off the water supply.
Before your next vacation, schedule a quick water heater inspection or flush with P&L Plumbing in Mesa to make sure your system is safe, clean, and energy-efficient while you’re away.
Call (480) 649-4400 or request service online for professional water heater maintenance today.