Why Is My Hot Water Heater Not Working?

Many homeowners ask a simple question: why is my hot water heater not working as expected? One of the most frustrating experiences is turning on the tap and discovering that your hot water heater not heating or is only giving you cold water. Whether you have an electric or gas system, understanding the common reasons behind a water heater not heating water can help you identify the problem more quickly and decide whether you need a professional repair. 

3 Main Reasons Why My Hot Water Heater is Not Working

1. There’s No Hot Water

If your water heater is not heating at all, the issue may lie with the electrical supply or internal safety mechanisms. A tripped circuit breaker can prevent your hot water system from turning on, so always check your breaker panel first. If resetting the breaker doesn’t help, the problem may be with the thermostat or heating elements.

2. Not Enough Hot Water

When your hot water tank is not heating enough water, it may be undersized for your household demands. Other causes include crossed hot and cold connections, which can be detected by testing a hot water faucet while the supply is off. Faulty thermostats or failing heating elements can also lead to insufficient hot water.

3. The Water Is Too Hot

Conversely, if your water is too hot, the thermostat may be set too high. Adjusting it according to the manufacturer's guidelines often fixes this issue. The U.S. Department of Energy generally recommends a setting around 120°F for safety and efficiency.

Other Reasons for Hot Water Heater Trouble

• Pilot Light Problem: Gas water heaters have a pilot light; if the flame goes out, you won’t get the combustion needed to produce hot water. You can try relighting it. But if the pilot keeps going out, there may be a dirty or clogged orifice or a defective thermocouple. If it won’t light at all, there may be air in the gas line, the gas valve on the supply pipe may be off, or gas pressure from the utility may be low.

• Burner Won’t Ignite: If the pilot light is lit, the burner should ignite. If not, the thermostat may be set too low or there may be a problem with the thermostat or gas valve. Turn off the gas supply valve if there’s a strong gas smell that won’t go away; then ventilate the space, leave the premises, and call the utility company or a plumber. There may be a dangerous gas leak.

• Electric Water Heater Damage: If your system is powered but not functioning properly, the high-temperature cutoff may need to be reset, or it may be damaged. The thermostat can be damaged if water gets inside the compartment. The only solution for leaking water is to replace the water heater.

• Water Leak: The sources of a hot water heater leak can include a faulty temperature and pressure relief valve, improper water pressure, or a nearby plumbing leak. When overheating, loose bolts on the heating element, or a bad gasket can cause one as well. This can severly damage the water tank. Loose plumbing connections and heating element bolts can be tightened, but you’ll need a professional to replace the gasket or check for corrosion inside the tank.

• Discolored Water: If the water from your faucets looks rusty, the water heater tank’s inner lining may be corroded. This is often a sign that the anode rod is failing; it can be replaced depending on what your repair contractor recommends.

• Noisy Water Heater: When your hot water heater becomes increasingly noisy, it’s likely sediment is building up in the tank. Flushing the tank should resolve this (whether you do it on your own or hire a professional). If the issue persists, there may be too much sediment or major damage.

Also, a water heater may not work because mineral deposits have blocked water flow in the pipes, or the pipes have frozen. A defective check valve in a water recirculating pump system can cause issues as well. And if the water heater and fixtures are too far apart (and pipes pass through an unheated space) water may come out cold. This can be fixed by insulating the water pipes, moving the water heater, or adding a second water heater or recirculating pump.

Contact IRBIS

At IRBIS Heating Cooling Plumbing, we can help troubleshoot and fix water heater issues and address faulty thermostats, ductwork problems, and indoor air quality concerns. Our AC and furnace technicians are available to assist you as well. Continue browsing to learn about our services, special offers, and financing; to request service, book an appointment online or call (669) 322-8182 today.

‍