Water Heater Problems

8 Common Water Heater Problems and How to Fix Them

Homeowners need to be aware of common water heater problems, as they can be a concern if not addressed in a timely manner. Water heaters are essential household appliances, providing hot water for bathing, cooking, and cleaning. However, like any other appliance, they can develop problems over time. In this article, we will discuss eight common water heater problems and how to fix them.

Common Water Heater Problems in Singapore

Before you jump onto fixing water heater issues, you must be aware of the common issues and their remedies. If water heaters start having issues, they become a headache and a continuous cause of irritation for homeowners. Therefore, this section will help you find and fix the water heater problems you are facing in your home. 

1. No Hot Water

One of the most common water heater problems is when there is no hot water. This issue can be due to a malfunctioning thermostat or a broken heating element.


Check the thermostat settings and ensure that they are set to the desired temperature. Adjust if necessary. If the thermostat is working fine, the heating element might need replacement. Turn off the power to the water heater, drain the tank, and replace the faulty heating element with a new one. 

It is recommended that you hire a professional like LS Plumber Singapore, who is an expert in services related to storage water heaters, instant water heaters, tap leak repair, etc.

2. Inadequate Hot Water

Sometimes, the water heater produces some hot water but not enough. This can be caused by an undersized water heater or a broken dip tube.


If your household’s water heater is too small, upgrade it to a larger model. Another reason is the broken dip tube. If the dip tube is broken, cold water may be mixed with the hot water at the top of the tank. Turn off the water supply, remove the dip tube, and replace it with a new one.

Common Water Heater Problems

3. Water Heater Leaks

Leaks can occur due to various reasons such as a faulty temperature and pressure (T&P) relief valve, a leaky drain valve, or corrosion in the tank.


If the T&P valve is faulty, it needs to be replaced. Turn off the power and water supply, drain the tank, and install a new valve. Furthermore, if the drain valve is leaking, tighten it or replace it if necessary. If the tank is corroded, it’s time to replace the entire water heater because this will cause problems for you again in the near future.

4. Discolored Water

If the water coming from your water heater is rusty or discolored, it can be due to corrosion in the tank or the anode rod.


Turn off the power and water supply, drain some water from the tank, and replace the anode rod. To remove sediment buildup, flush the tank by attaching a hose to the drain valve and letting the water run out until it’s clear.

5. Strange Noises

Water heaters can make strange noises due to sediment buildup in the tank or a faulty heating element.

How to Fix

Sediment buildup can cause popping or rumbling noises. Flush the tank to remove the sediment. If the heating element is faulty, replace it as described earlier.

6. Water Too Hot

If the water is too hot, it can be due to a malfunctioning thermostat or a broken temperature and pressure (T&P) relief valve.


  • Check the Thermostat Settings: Ensure that the thermostat is set to a safe temperature, usually around 120 degrees Fahrenheit. Adjust if necessary.
  • Replace the T&P Valve: If the T&P valve is faulty, replace it to prevent dangerous pressure buildup.

7. Low Water Pressure

Low water pressure can be caused by sediment buildup in the pipes or a faulty shut-off valve.


  • Flush the Pipes: Sediment buildup can reduce water flow. Flush the pipes to remove the sediment.
  • Replace the Shut-off Valve: If the shut-off valve is faulty, replace it to restore proper water pressure.

How to fix Water Heater Problems

8. Pilot Light Won’t Stay Lit

If you have a gas water heater and the pilot light won’t stay lit, it can be due to a faulty thermocouple or a dirty pilot tube.


Turn off the gas supply, remove the old thermocouple, and install a new one. Use a needle to clean out any debris in the pilot tube that might be blocking the gas flow.


Water heater problems can be frustrating, but many issues can be fixed with some troubleshooting and basic repairs. By understanding the common problems and their solutions, you can keep your water heater running smoothly and extend its lifespan. Regular maintenance and timely repairs can prevent most water heater issues, ensuring a consistent supply of hot water for your home.

Frequently Asked Questions

Water heater malfunctions are mainly caused by sediment accumulation, faulty heating elements and thermostats, corroded anode rods, and very high water pressure. Proper maintenance can avoid many of these problems.
If the water heater goes on the blink, it could pump in over 500 gallons an hour into your home while you are at work. That's over two and a half times the water in a standard hot tub. Think of all that water being pumped into your home or basement while you are away.
Furnaces don't require water to run, but homeowners may observe condensation and moisture around their furnaces over time.
Scroll to Top