Common Denver Area Water Heater Problems
Hard water is a major factor here, as our water supply contains minerals like calcium and magnesium. Over time, this sediment settles in the bottom of a tank heater, reducing efficiency, causing rumbling noises, and leading to overheating at the bottom of the tank. This sediment can also clog tankless unit heat exchangers.
Altitude affects the boiling point of water and can influence pressure relief valve operation and overall system pressure. Older homes in Denver and surrounding towns often have water heaters nearing or past their typical 10 to 12 year lifespan, making failures more likely. In winter, frozen inlet or outlet pipes in unheated spaces like crawl spaces are also a risk.
What a Plumber Checks and How They Fix It
The plumber we connect you with will start by asking about the symptoms and the age of your unit. They will check the water temperature, test the pressure relief valve for proper operation, and inspect for leaks at connections and the tank itself. For gas heaters, they will verify the thermocouple and burner assembly. For electric units, they will test the heating elements.
A common fix for a tank heater with sediment is a full system flush to clear the tank. A faulty heating element, thermostat, or pressure relief valve is often replaced. For gas units, a bad thermocouple or a clogged burner may be the culprit. If the tank itself is leaking, replacement is usually necessary. Repairs typically take one to three hours, while a full replacement is usually a half-day job.
What You Can Check First
- Verify the circuit breaker for an electric heater is on.
- For gas units, ensure the pilot light is lit.
- Check that the temperature setting on the unit hasn't been accidentally lowered.
- Look for any visible water on the floor around the heater.
- Listen for popping or rumbling sounds coming from the tank.
- Note if hot water runs out much faster than usual.
- Check the age of the unit on its manufacturer label.
When Water Heater Repair Can't Wait
Certain situations require immediate attention from a professional. If you see a steady stream of water leaking from the tank itself, shut off the water supply to the heater and call a plumber promptly, as this indicates tank failure. A leaking pressure relief valve that doesn't stop dripping after being manually lifted and released also needs urgent care.
If you smell gas around a gas water heater, leave the area immediately and contact your gas company from outside, then call a plumber for repair. No hot water during freezing temperatures can risk pipe bursts, so that should be addressed quickly. A water heater making loud banging or knocking sounds could be experiencing excessive pressure buildup.
Questions homeowners ask
What does water heater repair typically cost in Denver?
Costs depend on the repair. Simple parts like a thermostat or heating element replacement are typically less expensive. A full tank flush to address hard water sediment or replacing a pressure relief valve falls in a mid-range. Major repairs like fixing a leaky tank often make replacement more cost-effective. The plumber we connect you with will provide an estimate before starting work.
How does the hard water here affect my water heater?
Denver's hard water leads to mineral scale buildup inside the heater. In tank models, this sediment insulates the water from the burner or elements, making it work harder and reducing its lifespan. It also causes noisy operation. For tankless units, scale can clog the heat exchanger, reducing flow and efficiency. Regular flushing can help mitigate this common local issue.
Should I repair or replace my old water heater?
If your unit is over 10 years old and needs a significant repair, replacement is often recommended. Newer models are more energy-efficient, which can save on utility bills. A professional can advise based on the cost of the repair, the unit's age, and its overall condition. Many older Denver homes see benefits from upgrading to a higher efficiency or larger capacity unit.
Can altitude in Boulder or Denver affect my water heater?
Yes, our higher altitude lowers the boiling point of water. This can sometimes cause water to vaporize more easily in pipes and within the heater. It primarily means technicians must ensure the temperature and pressure relief valve is correctly rated and functioning for our elevation to maintain safe operation.
What's the most common repair for a gas water heater here?
A frequent issue is a faulty thermocouple, which is the safety device that shuts off gas if the pilot light goes out. Replacing this is a common repair. Other common calls are for sediment buildup from hard water causing noise and inefficiency, and for problems with the gas burner assembly being clogged or not igniting properly.
How long does a water heater repair usually take?
Most diagnostic visits and straightforward repairs, like replacing a heating element or thermocouple, can be completed in one to two hours. A full system flush to remove sediment may take two to three hours. If the diagnosis leads to a recommendation for replacement, the plumber can usually install a new standard tank unit in a half day.