You used to get 20 minutes of hot water. Now you are rinsing shampoo in cold water after 7. Before you spend $2,500 on a new unit, run through these five fixes. Some of them take 10 minutes and cost nothing.
1. Flush the Sediment Out of Your Tank
This is the number one cause of shrinking hot water supply in Florida. Treasure Coast hard water dumps calcium and minerals into your tank every time it heats. Over years, that sediment piles up at the bottom and takes up space your water used to occupy.
A 50-gallon tank with two inches of sediment effectively becomes a 35-gallon tank. Flushing it out can restore most of your capacity. You can DIY this with a garden hose and 30 minutes, or have a plumber handle it during annual water heater maintenance.
2. Check the Dip Tube
The dip tube is a plastic pipe inside your tank that pushes cold incoming water to the bottom so the hot water at the top stays hot. When dip tubes crack or break — common in older units — cold water mixes with your hot water near the top of the tank. Result: lukewarm water that runs out fast.
Replacing a dip tube costs $20 in parts and 30 minutes of labor. Way cheaper than a new water heater.
3. Test the Heating Elements (Electric Units)
Electric water heaters have two heating elements — upper and lower. If the lower element fails, you only get hot water from the top half of the tank, cutting your supply in half. The upper keeps working, so you do not lose hot water entirely — just way less of it.
A plumber can test elements in 15 minutes with a multimeter. Replacement parts run $20-$50 and the labor is straightforward.
4. Check the Thermostat Setting
This sounds too obvious, but it is surprising how often it is the answer. Thermostats get bumped, settings drift, or someone in your house turned it down to save money. Florida code allows up to 120F. The U.S. Department of Energy recommends 120°F as the ideal setting for safety and efficiency.
If yours is set lower, you are not getting cold water — you are getting less hot water mixed in to reach your shower temperature, so your usable supply shrinks. Bump it up to 120F and see if the problem resolves.
5. Inspect for a Failing Gas Burner (Gas Units)
If you have a gas water heater and your hot water has gradually gotten weaker, your burner may be partially clogged or your pilot flame may be inefficient. Sediment buildup on the burner restricts the flame. A plumber can clean it during routine water heater repair.
When It Is Actually Time to Replace
If you have worked through these five fixes and nothing helps, the tank itself is the problem. The same applies if your unit is over 10 years old, if you see rust in the water, or if there is any moisture around the base. At that point, repair money is wasted money.
A new water heater replacement on your schedule costs $1,500-$2,800 installed. A failed water heater that floods your garage costs $1,500-$2,800 plus thousands in water damage. The math is obvious.
Get a Free Diagnosis
Discount Water Heaters handles water heater repair and replacement across the Treasure Coast. We will tell you straight up whether your unit can be fixed or whether you are throwing good money after bad.
If your home’s HVAC system also needs attention, One Hour Heating & Air Conditioning of Treasure Coast provides 24/7 HVAC service across the Treasure Coast.
Call or text: 772-202-6671
Contact us today and stop taking cold showers.