
Water Heater Repair When the Hot Water Runs Out
Tank and tankless water heater repair for Arlington and DFW homes. No hot water, leaks, noise and pilot problems diagnosed and fixed with a price you approve first.
Water heater repair
Hot Water Back, Without the Guesswork
A water heater rarely fails at a convenient time. Aerex Mechanical technicians diagnose gas and electric tank units and tankless systems, explain what has failed and quote the repair before starting, so there are no surprises on the invoice.
We repair thermostats, heating elements, thermocouples, gas valves, pressure relief valves and tankless flow and ignition faults. If the tank itself is leaking or the unit is past its useful life, we tell you plainly and give you replacement numbers to compare.
- Gas and electric tank water heater repair
- Tankless water heater service and descaling
- No hot water, lukewarm water and recovery problems
- Pilot, thermocouple and gas valve faults
- Leaks, pressure relief valves and expansion tanks
- Sediment flush and safety checks on every visit

What is included
What a Water Heater Repair Visit Covers
A complete inspection, a firm quote and a repair that is tested before we leave.
Full Inspection
Tank, connections, venting, relief valve and controls inspected so we catch the problem behind the symptom.
Firm Quote First
You know the repair cost before we begin. If the tank is leaking or the unit is near end of life, we show you replacement pricing too.
Gas & Electric Repairs
Thermocouples, pilot assemblies, gas valves, heating elements and thermostats replaced with correct parts.
Tankless Service
Descaling, flow sensor, igniter and error-code faults on tankless units diagnosed and corrected.
Leak & Valve Repair
Fittings, drain valves, pressure relief valves and expansion tanks repaired or replaced to stop leaks and protect the tank.
Safety Verification
Gas connections, venting and temperature settings checked before the unit goes back into service.
How a Water Heater Repair Call Works
Straightforward from the first call to a hot shower.
Call or Request Online
Tell us the symptom and the type of unit if you know it. No-hot-water calls are prioritized.
On-Site Diagnosis
A licensed technician inspects the unit, identifies the fault and explains your options.
Approve the Quote
A firm price for the repair, and a replacement comparison when the unit is leaking or past its useful life.
Repair & Verify
We complete the repair, bring the unit up to temperature and verify safe operation before we leave.
Water Heater Repair FAQs
The questions Arlington homeowners ask us most about water heater problems.
Why do I have no hot water?
On a gas unit it is often a pilot or thermocouple problem or a failed gas valve. On an electric unit it is usually a tripped high-limit switch, a failed heating element or a thermostat. Tankless units usually show an error code that points to the cause. A technician can confirm which quickly.
Can a leaking water heater be repaired?
Leaks from fittings, valves or the drain can usually be repaired. A leak from the tank itself cannot, and the unit needs to be replaced. We tell you which it is before quoting anything.
How long should a water heater last?
Tank units typically last 8 to 12 years, longer with regular flushing. Tankless units often last 15 to 20 years with annual descaling. Age, water quality and maintenance all affect it.
Do you repair tankless water heaters?
Yes. We service tankless units from major manufacturers, including descaling, ignition and flow sensor repairs and error-code diagnosis.
Related services
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Tank and tankless replacement with correct sizing, venting and permits, usually completed in a single visit.
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Furnace and heat pump diagnostics and repair when your home stops heating, with upfront pricing before any work starts.
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AC repair for the Texas heat. Diagnosed, quoted and fixed by licensed technicians, with emergency dispatch available.
View serviceGet in touch
Tell Us What Your Building or Home Needs
Emergency repair, a maintenance quote, a system inspection, a full replacement or a new furnace, AC or water heater for your home. Reach out and we will respond within one business day.
Call or Text
(469) 351-3356
info@aerex-mechanical.com
Based in
Arlington, Texas (serving DFW)
Hours
Mon-Fri 7:00 AM - 5:00 PM, emergency service available
Request Service or a Quote
Tell us about your building or home and what you need.
Ready to Work With a Contractor You Can Count On?
Join the property managers, business owners and homeowners across DFW who trust Aerex Mechanical to keep things running.

