How to Fix Having No Hot Water | MileHi HVAC Guide

If you’ve suddenly found yourself without hot water, you’re not alone. It’s one of the most common home comfort issues, especially during Denver’s chilly months. Before calling for emergency service, it helps to understand what might be causing the problem and how to troubleshoot it safely. At MileHi HVAC, we’ve helped countless homeowners restore their hot water quickly and efficiently.

In this guide, we’ll walk you through how to fix having no hot water, what could be causing it, and when it’s time to call a professional.

Common Reasons You Have No Hot Water

There are several possible culprits when your water heater stops working. Let’s start with the most common ones:

1.1. Tripped Breaker or Blown Fuse

For electric water heaters, the first step is checking the electrical panel. A tripped breaker or blown fuse can stop power from reaching the unit.

• Fix: Flip the breaker fully OFF and then back ON. Replace any blown fuses if necessary.

• If the breaker continues to trip, there may be an underlying wiring or heating element issue that requires a licensed technician.

1.2. Pilot Light Went Out (Gas Water Heaters)

If you have a gas water heater, a blown-out pilot light is a common reason for no hot water.

• Fix: Follow your manufacturer’s instructions to safely relight the pilot.

• Tip: If it won’t stay lit, the thermocouple may be faulty and needs replacement.

1.3. Faulty Heating Element

Electric water heaters rely on heating elements inside the tank. If one burns out, your water may run lukewarm or completely cold.

• Fix: A multimeter can test the element for continuity. Replacing it is usually a simple and inexpensive repair.

1.4. Thermostat Issues

A malfunctioning thermostat can prevent your heater from maintaining the right water temperature.

• Fix: Reset or replace the thermostat if it’s unresponsive or inaccurate.

1.5. Sediment Buildup in the Tank

Hard water minerals collect at the bottom of your water heater over time, reducing efficiency and capacity.

• Fix: Drain and flush the tank once or twice a year to prevent buildup.

Step-by-Step Guide: How to Fix Having No Hot Water

Follow these simple steps before scheduling a professional service call:

Step 1: Check the Power or Gas Supply

• For electric units: Ensure the power switch is ON.

• For gas units: Make sure the gas valve is open and the pilot is lit.

Step 2: Inspect the Reset Button

Most electric water heaters have a red reset button on the upper thermostat behind the access panel.

• Press and hold the reset button.

• If you hear a click, your heater might restart.

For more details, check our guide on Water Heater Working But No Hot Water? to understand why the reset doesn’t always solve the issue.

Step 3: Check for Leaks

Any visible water around your tank can signal a serious problem like a failed valve or corrosion.

• Fix: Turn off the power/gas and water supply, then call for professional help immediately.

Step 4: Test Water Temperature After 30 Minutes

Once you’ve reset the system or relit the pilot, give your water heater 20–30 minutes to reheat. If there’s still no hot water, further inspection or repair may be needed.

When to Call a Professional

Some water heater issues require expert attention for safety and performance reasons. Contact a licensed HVAC technician if:

• You smell gas near the heater.

• The breaker keeps tripping after reset.

• You see leaks or rust around the tank.

• The water temperature fluctuates unpredictably.

For reliable results, schedule Denver water heater services with MileHi HVAC. Our expert technicians handle everything from minor fixes to full water heater replacements, keeping your home comfortable and your hot water flowing efficiently all year long.

Preventing Future Hot Water Problems

Routine maintenance is the key to avoiding sudden hot water loss. Here’s how you can keep your system in top shape:

• Flush your water heater annually to remove sediment.

• Test the pressure relief valve once a year.

• Insulate exposed hot water pipes.

• Schedule professional maintenance at least once annually.

Preventive care not only improves efficiency but also extends your system’s lifespan saving you money in the long run.

You can read about: How Often Does a Heater Need to Be Serviced?

Final Thoughts

Knowing how to address a lack of hot water can save you both time and frustration when issues occur. However, if simple troubleshooting doesn’t restore your system, it’s best to rely on experienced professionals.

At MileHi HVAC, we specialize in diagnosing and repairing all types of water heater problems efficiently and safely. From a quick reset or thermostat replacement to a complete system upgrade, our team ensures your home stays comfortable throughout the year.

Contact us today for dependable water heater services in Denver and enjoy consistent, reliable hot water once again.

Frequently Asked Questions (FAQs)

1. Why is my water heater not heating even after resetting it?

If your water heater still doesn’t heat after resetting, the issue may be a faulty thermostat or heating element that needs replacement.

2. How long should I wait after resetting my water heater?

Wait at least 20–30 minutes to allow the tank to reheat. Larger tanks may take up to 45 minutes.

3. Why does my pilot light keep going out?

A faulty thermocouple or dirty pilot assembly can cause the flame to extinguish repeatedly.

4. Should I drain my water heater regularly?

Yes. Flushing your tank annually removes sediment buildup and improves heating efficiency.

5. When should I call a professional?

If you notice leaks, gas smells, or electrical issues, call a certified technician immediately for safety.