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How much does a thermostat cost for a hot water heater

Author

Emily Cortez

Published Mar 23, 2026

The average thermostat replacement cost is between $100 and $300.

How do I know if my hot water heater thermostat is bad?

If you turn the hot water tap and cold water runs out, then the upper thermostat is damaged. But if the water is hot that becomes later becomes cold, then you have a damaged lower thermostat.

How do I reset my water heater thermostat?

Somewhere on your electric water heater, you’ll find a reset button. It’s usually red and often located near the thermostat. It may also be hidden behind a removable metal panel on the unit—and then behind some insulation. Once you find the button, push and release it.

What does it cost to replace a thermocouple on a hot water heater?

Thermocouple – $20 to $150 The thermocouple is an apparatus that senses whether the pilot light is lit and triggers the gas control valve. Repairs typically cost about $150 to have it done professionally, though a new thermocouple itself only costs about $20 on average.

How long should a hot water thermostat last?

It would be nice to know when the time is right to replace your water before it springs a leak and causes an inconvenience or worse yet, damage to your home. Typically a residential hot water heater lasts between 6 and 13 years.

How much does it cost to replace a 40 gallon hot water heater?

Water heater costs by gallon A standard 40-gallon water heater costs $330 to $1,500 for the unit alone, or $500 to $2,500 including installation labor. *Price for tank unit only, not including installation.

Do you have to drain a hot water heater to change the thermostat?

Always disconnect the power or shut off the breaker before doing any work on a water heater. To change thermostats, you will need to remove the access panel and safety cover (do this for both upper and lower access panels on dual element units).

What causes water heater pilot to go out?

Some of the most common reasons that water heater pilot lights go out include: A faulty thermocouple. … Over time, thermocouples can begin to malfunction and shut off the gas supply to the pilot light even if it’s burning properly. A bent or dirty thermocouple.

How much is Lowes water heater installation?

When it comes to installing traditional tank water heaters, Lowe’s charges 325 dollars for basic installation.

How long does it take for hot water to reset?

Once you’ve reset the system, you have to wait for hot water (unless you have an on-demand water heater), but for how long? It depends on the size of the tank, but with any unit, you should be able to get in a hot shower with gas water heaters within 30-40 minutes and with electric tanks, about 60-90 minutes.

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How does a hot water heater thermostat work?

The thermostat is a thermistor that responds to heat by producing a small electric current. The current increases when water temperature increases, and drops when temperature drops. Changes in the electric current cause gas control to turn ON and OFF. When gas control turns ON, it releases gas to burner.

How long does it take to replace a hot water heater?

Tank to Tank installation: On average, replacing a gas or electric water tank with a similar model takes two to three hours. It takes between 45 to 60 minutes to drain, disconnect and remove your old water heater.

Can a water heater last 25 years?

A typical hot water heater usually has a five or six year warranty, regardless of whether it’s gas or electric. … While their warranties usually cover them for about 10 years, they could last up to 20 years.

How do you check a thermostat on a hot water heater?

Test the lower portion of the thermostat, by touching one lead to the common terminal (next to the temperature setting) and the second lead to the left heating element terminal. If the water in the tank is below the thermostat’s set temperature, the multimeter should read close to zero ohms of resistance.

Do I need an electrician to replace a thermostat?

Your best option is to have a C-wire properly installed and run to your new thermostat, which means it will require an electrician’s expertise. Even if you find a DIY article or video online, the risk to your health or home isn’t worth it when dealing electrical wiring.

How much does it cost to replace a thermostat?

National Average Cost$229Minimum Cost$80Maximum Cost$450Average Range$142 to $346

How much does it cost to install thermostat?

Most electricians can install or replace the thermostat in a house, apartment or business in two hours or less at a rate of $65-$85 per hour — for a total labor cost of less than $170.

Does a water heater have a thermostat?

Most electric water heaters above 20 gallons have two thermostats that sense the temperature of the water in both the top and bottom of the tank. The upper thermostat is the boss and always tells the lower thermostat what to do.

Why is my water heater not heating?

1. No Power or Gas. If an electric water heater is not producing hot water, it could be a simple problem like a blown fuse or tripped circuit breaker. Additionally, some electric water heaters have a circuit-style safety switch located near or on the thermostat.

How often should a hot water heater be replaced?

If your tank water heater is more than 10 years old, it may be time to consider replacing it. With proper maintenance, a tank water heater tank should last six to 12 years. A tankless water heater can last for more than 20 years. Check your water heater’s warranty for the most accurate timelines.

What is the labor cost to install a water heater?

Labor costs to install a standard replacement water heater usually run from $150 to $800. Most plumbers will quote a flat rate that includes materials and labor, but some may charge by the hour. Hiring a plumber will cost anywhere from $45 to $200 per hour, and an electrician can run from $50 to $100 an hour.

How much does it cost to replace a 50-gallon hot water heater?

How much does it cost to replace a 50-gallon water heater? A 50-gallon water heater costs around $1,000 for an electric heater and $1,200 for a natural gas heater of the same capacity.

How much does it cost to replace pilot light on water heater?

Pilot light replacement or lighting cost Water heater pilot light replacement costs $50 to $200. The pilot light produces a flame to ignite the gas burner. Plumbers charge $45 to $150 per hour to reignite the pilot light, and the task typically takes 1 hour or less.

How long does it take a 40 gallon water heater to heat up?

While they can vary in size, the most common size of water heater is 40 gallons, which is what we’ll be using here when talking about how fast they work. The bigger the heater, the longer they take to heat up the water. The average gas heater takes between 30 and 40 minutes to fully heat up the water in its tank.

How long should it take a 50 gallon water heater to heat up?

A 50-gallon hot water heater with 5,500-watt elements set to 120 degrees takes about 1 hour and 20 minutes to heat water coming in to the unit at 60 degrees. Conversely, when the water entering this same tank is 40 degrees, it takes 1 hours, 47 minutes to heat it up.