No hot water anywhere in the house is a frustrating problem no one wants to deal with—especially when you’re trying to shower, wash clothes, or cook to keep your daily routines on track. Before allowing panic to take over, there are a few things you can check for simple fixes, while others might require inspection and repairs to get running again.
Whether you’ve just moved in or have been settled for a while, this is your troubleshooting guide for five common reasons for no hot water in the house. Let’s make sure you know what to look for and when to involve an expert.
1. Is the Water Heater Getting Power?
While it may sound like a silly thing to check, you still should. If your water heater isn’t getting power, it won’t heat water—no matter the type of system you have.
Electric Water Heaters
Check the circuit breaker. If it’s tripped, reset it and wait a few minutes to see if the water starts heating up. A blown fuse or faulty wiring might also be the cause, in which case an electrician or inspector should check for deeper issues.
Gas Water Heaters
Make sure the gas valve is open and that your pilot light is on. If the pilot light keeps going out, the thermocouple (a safety device that shuts off gas flow) could be faulty. A gas leak or pressure issue might also be preventing the heater from working.
Tankless Water Heaters
Look for an error code on the unit’s display. Issues like low gas pressure, clogged air filters, or vent blockages can stop the system from producing hot water.
2. Is the Thermostat Set Correctly?
A simple thermostat adjustment might be all you need to restore hot water.
- Most water heaters are set to 120°F for safety and efficiency. If the temperature is set too low, the water may not feel warm enough.
- Adjust the thermostat slightly and wait to see if the water heats up. If there’s no change, the thermostat could be faulty.
- Older water heaters with mechanical dials can sometimes slip out of place, leading to inaccurate readings.
3. Could Sediment Buildup Be the Problem?
If your water heater is heating slowly or running out of hot water too quickly, sediment buildup could be reducing efficiency. According to industry professionals, it can make a water heater more than 30% less efficient.
Over time, minerals from hard water settle at the bottom of the tank, making it harder for the heating element or burner to warm the water.
Signs of excess sediment:
- Water taking longer to heat
- Popping or rumbling noises from the tank
- Hot water running out faster than usual
Flushing the water heater once a year can help prevent buildup and extend its lifespan. However, if the sediment is severe, the heating element may already be damaged.
4. Could a Heating Element or Burner Be Failing?
A failing heating element or burner can leave you with cold water even if the system seems to be working.
- Electric water heaters: These use heating elements inside the tank. If one burns out, the water may be lukewarm or cold. Most heating elements last 6-10 years before needing replacement.
- Gas water heaters: If the burner isn’t igniting properly, the water won’t heat. A faulty thermocouple, gas control valve, or ignition issue could be to blame.
Pro tip: If your water is lukewarm but never fully hot, one of the heating elements (in dual-element systems) may have failed.
5. Could a Leak Be Stealing Your Hot Water?
A hot water leak can prevent heated water from reaching your faucets, making it seem like the water heater isn’t working. Around 75% of water heater failures are due to leaks, either from age or corrosion.
Signs of a leak:
- Puddles or damp spots around the water heater
- Mold, mildew, or musty smells near walls or floors
- Lower water pressure when using hot water
Even small leaks can cause major problems over time, leading to water damage and higher utility bills.
Other Tips & Maintenance
Routine maintenance can help prevent hot water issues before they start:
- Flush the water heater once a year to prevent sediment buildup.
- Test the pressure relief valve to ensure it’s working properly.
- Check for leaks around the tank and pipes regularly.
- Insulate hot water pipes to improve efficiency and reduce heat loss.
When to Call a Professional
If troubleshooting hasn’t restored your hot water, it may be time to call an expert. Consider a professional inspection if:
- The water heater is over 10 years old and struggling to perform.
- You suspect a leak but can’t find the source.
- The unit keeps tripping the breaker or has electrical issues.
- There are signs of gas problems, such as a lingering odor near the heater.
An inspector can evaluate your water heater, plumbing system, and home infrastructure to identify problems before they turn into costly repairs.
Conclusion
No hot water can disrupt your daily routine, but troubleshooting these five common issues may help your house get back on track. If your water heater is showing signs of bigger problems, America’s Choice Inspections can provide a thorough check to ensure everything is working safely and efficiently.
Need a professional inspection? Book yours online today or give us a call to schedule, get answers, and make a plan.