When your water heater isn't working properly—no hot water, not enough hot water, leaks, or strange noises—you need a plumber who can diagnose and repair it. In London Ontario, hard water and cold winters can take a toll on tanks and components. Our 24/7 emergency plumbing dispatch connects you with plumbers who offer water heater repair across London, St Thomas, Strathroy, Woodstock, Ingersoll, and Dorchester—for gas and electric units, tank and tankless.
Signs Your Water Heater Needs Repair
- No hot water or hot water runs out quickly
- Water not as hot as it used to be (thermostat or heating element issue)
- Leaking from the tank, connections, or pressure relief valve
- Rust-coloured or smelly hot water (corrosion or bacteria in tank)
- Rumbling, banging, or popping sounds (sediment buildup)
- Pilot light won't stay lit (gas units) or breaker keeps tripping (electric)
For a sudden leak or complete failure, see our water heater emergency London page for immediate steps. For other plumbing issues—burst pipe, leaking pipe, drain cleaning—our emergency plumber London dispatch can connect you with the right service.
What To Do When Your Water Heater Fails
- If the tank is leaking – Turn off the cold water supply to the heater and, for gas units, turn the gas control to "Pilot" or "Off." For electric, shut off the breaker.
- Don't ignore strange noises or smells – These can indicate sediment, overheating, or corrosion; a plumber can flush the tank or recommend repair or replacement.
- Check the pilot (gas) or breaker (electric) – Sometimes the issue is a simple relight or reset; if not, call for repair.
- Call for water heater repair – Our dispatch connects you with plumbers who can repair elements, thermostats, valves, and connections, or recommend replacement when the unit is past its useful life.
Why Water Heaters Need Repair in London Ontario
Hard water in the London region leaves mineral buildup (scale) inside tanks and on heating elements, reducing efficiency and shortening lifespan. Cold winter inlet water makes the heater work harder. Most tank water heaters last 10–15 years; older units are more likely to leak or fail. Sediment can cause noise and overheating; annual flushing can help. Faulty pressure relief valves, corroded anodes, and worn heating elements are common repair items. A plumber can advise whether repair or replacement is the best option. For urgent issues like major leaks or no hot water in winter, our water heater emergency London service is available 24/7.
For sewer backup, toilet overflow, or sump pump issues, our plumbers can help with those too.
Water Heater Repair vs Replacement
Repairs make sense when the unit is relatively new and the problem is a single component (element, thermostat, valve). When the tank is leaking, severely corroded, or older than about 12–15 years, replacement is often more cost-effective. A plumber can give you an honest recommendation and quote for repair or replacement. We connect you with licensed plumbers who serve London Ontario and nearby communities for water heater repair and installation.
For water heater repair in London Ontario, call our 24/7 dispatch or request help online. We serve London, St Thomas, Strathroy, Woodstock, Ingersoll, and Dorchester.
Get Help Now
For water heater repair in London Ontario—same-day or emergency—call our 24/7 emergency plumbing dispatch or request help online. We connect you with licensed plumbers serving London and the surrounding area.