Waking up to no hot water in the house is never fun. The good news is that many causes are simple to check, and some can be fixed in minutes. This guide walks you through the most common reasons for no hot water in the house, for both electric and gas water heaters, and explains when it is time to call a pro.
Start here: is it the whole house or one faucet?
Turn on the hot water at two or three different taps. If only one faucet or shower runs cold, the problem is likely that fixture, such as a worn mixing valve or cartridge. If every tap is cold, the problem is with the water heater itself.
Electric water heater: 4 common causes
1. A tripped circuit breaker
Electric water heaters use a large double breaker. If it has tripped, the heater has no power. Switch it fully off and back on once. If it trips again, stop and call a professional, because something inside the heater may be shorting.
2. The high-limit reset button
Most electric heaters have a red reset button behind the upper access panel. It cuts power if the water gets too hot. Pressing it can restore hot water, but if it keeps tripping, a thermostat or element is likely failing.
3. A failed heating element
Electric heaters have one or two heating elements. When the upper element fails, there is usually no hot water at all. When the lower one fails, you may get a little hot water that runs out quickly. Elements are a common and affordable repair.
4. A faulty thermostat
Each element is controlled by a thermostat. If a thermostat stops working, the element never turns on, even though the heater has power. The recommended setting is 120°F (49°C) — anything lower can feel like lukewarm water.
The recommended setting is 120°F (49°C) — anything lower can feel like lukewarm water.
Gas water heater: 4 common causes
5. The pilot light is out
On older gas heaters, a small pilot flame lights the burner. If it goes out, there is no heat. Many heaters have relighting instructions on the label. If the pilot will not stay lit, the thermocouple or gas valve may need attention.
6. A bad thermocouple
The thermocouple is a safety sensor that keeps the gas valve open only when the pilot is lit. When it wears out, the pilot lights but goes out again as soon as you let go of the knob.
7. A gas supply problem
Check that the gas valve on the supply line is open and that other gas appliances work. If none of them work, contact your gas company.
8. A failing gas control valve or igniter
Newer heaters use electronic ignition instead of a pilot. If the igniter or gas control valve fails, the burner will not light. These parts should be replaced by a professional.
When you have some hot water, but not enough
If the water gets warm but runs out quickly, the cause may be sediment from hard water taking up space in the tank, a broken dip tube mixing cold water into the hot, or a tank that is too small for your household.
A family of four typically needs a 40 to 50 gallon tank — a smaller tank may simply struggle during morning rush hours.
Safety first
- If you smell gas, do not try to relight anything. Leave the home and call your gas company or 911 from outside.
- Do not keep resetting a breaker or reset button that trips again and again.
- Water heaters can hold very hot water. Be careful around valves and drains.
Frequently asked questions
How long does it take to get hot water back?
It depends on the cause. A reset breaker takes about 30 minutes. A professional repair visit typically takes 1 to 2 hours.
How much does water heater repair cost in Greenwood, IN?
Costs vary by problem. Minor repairs start around $150, while a full replacement ranges from $800 to $1,500 depending on the unit. See our water heater repair cost guide for details.
Can I repair a water heater myself?
Basic checks like the breaker or thermostat — yes. Anything involving gas lines, heating elements, or the tank itself should always be left to a licensed plumber.
No hot water in the house in Greenwood, IN?
If you have checked the simple things and there is still no hot water in the house, call now or request a free quote. A local water heater pro can find the cause quickly and explain your repair or replacement options before any work starts.
We show up on time, explain the problem clearly, and get your hot water running again — call now or request a free quote for same-day service in Greenwood, IN.