Water Heater Repair in St. Louis

Same-Day Service, Repair-First Approach, Written Satisfaction Guarantee

When your hot water stops working, Dunn Plumbing, Heating & Air Conditioning, LLC is the call to make. We’ve been repairing water heaters for St. Louis homeowners since 2003, and we arrive in fully stocked trucks ready to diagnose and fix most problems in a single visit. Our technicians evaluate every unit before making any recommendation, and we won’t push a replacement if the issue can be repaired.

We’re available 24/7 for emergency water heater service, with same-day appointments for most calls. If another contractor has condemned your equipment, we’ll give you a free second opinion before you commit to anything.

Don’t go without hot water longer than you have to. Call us at (314) 476-9606 to schedule same-day water heater repair in St. Louis or to reach our emergency line any time of day or night.

Signs Your Water Heater Needs Professional Attention

Some warning signs are obvious; others build slowly until the unit fails at the worst possible moment. St. Louis area water is hard, and sediment accumulation inside the tank is one of the most common causes of premature failure here. If you notice any of the following, it’s time to call.

Watch for these warning signs:

• No hot water or inconsistent temperatures across showers, laundry, or dishes
• Rumbling, popping, or banging sounds from the tank, often caused by sediment buildup common in St. Louis hard water conditions
• Rusty or discolored hot water, which can signal internal tank corrosion
• Moisture or pooling water around the base of the unit
• Unexplained increases in energy bills, a common symptom of a failing heating element or thermostat
• A unit 10 or more years old showing any of the symptoms above

Water Heater Repairs We Handle

Our team services both tank and tankless water heaters, covering gas and electric systems alike. Whether the problem is a single failed component or a pattern of declining performance, we diagnose the root cause before recommending any repair.

Common repairs include:

• Failed heating elements and faulty thermostats
• Pilot light and ignition problems on gas units
• Pressure relief valve inspection and replacement
• Anode rod replacement to address tank corrosion
• Sediment flushing to restore heating efficiency
• Tankless unit repairs including igniter failure, flow sensor issues, and scale buildup
• Expansion tank service

A thorough diagnosis tells us whether the failure is a repairable component or a sign the system is nearing end of life. That evaluation shapes every conversation we have with homeowners about their options.

Honest Evaluation, No Pressure

When you call us for water heater repair, we schedule your visit and dispatch a technician in a fully stocked truck. On arrival, we examine the unit, identify what failed, and tell you exactly what we found. If the problem is repairable, we repair it. We don’t steer homeowners toward replacement to close a larger ticket.

When replacement is genuinely the better path (because the unit is beyond its useful life or the repair cost outweighs the system’s remaining value), we have that conversation plainly. We can discuss your household’s hot water usage and recommend the model that best fits your demand. Free estimates apply to all new equipment installations. Every technician wears booties, lays down tarps, and cleans up before leaving.

Why St. Louis Homeowners Call Dunn First

Serving St. Louis, Mehlville, Ballwin, Affton, and the surrounding communities since 2003 has given us a long record of water heater repairs across every type of residential system. We back every job with a written 100% satisfaction guarantee: if you’re not satisfied, we’ll make it right or refund your money. That commitment reflects a confirmed policy and is one reason homeowners keep calling us back.

What sets our service apart:

• Written 100% satisfaction guarantee with full refund if you’re not satisfied
• Free second opinions on equipment another contractor has condemned
• 24/7 emergency service and same-day appointments for most calls
• Technicians trained and certified to meet St. Louis City and County requirements
• Fully stocked trucks that resolve most repairs in one visit
• Respectful job-site care: booties, tarps, and full cleanup on every call

Schedule Water Heater Repair in St. Louis Today

Hot water isn’t something to wait on. Whether you’re dealing with a complete outage or early warning signs you don’t want to ignore, we’re ready to help today. Our estimate is free, our evaluation is honest, and our guarantee is in writing.

Call (314) 476-9606 now to schedule service or reach our 24/7 emergency line. You can also contact us online to request a same-day appointment for water heater repair in the St. Louis area.