Water Heater Repair in Oshawa
Many Ontario homes rent their water heater. If yours is a rental, the rental company is typically responsible for repairs, so check your utility bill or the label on the tank before arranging work.
Common symptoms
- No hot water, or hot water that runs out quickly
- Rumbling or popping sounds from the tank
- Rusty or discoloured hot water
- Water pooling around the base of the tank
- Pilot light that won't stay lit on a gas unit
Common causes
- Sediment build-up at the bottom of the tank
- A failed heating element or thermostat on electric models
- Thermocouple, igniter or venting issues on gas models
- Corrosion once the anode rod is used up
- Leaking temperature and pressure relief valve
Safe steps you can take now
- For a gas unit, set the control to ‘pilot’ or ‘off’. For electric, switch off the breaker.
- Close the cold-water inlet valve on top of the tank to stop more water entering.
- Never cap or block the temperature and pressure relief valve.
- If you smell gas, leave the house and call Enbridge Gas or 911 from outside.
When to call a qualified plumber
- The tank itself is leaking
- You smell gas or see scorching near the burner
- The relief valve is discharging water repeatedly
- Your unit is a rental — contact the rental provider first
Typical repair options
Component repair
Replacing elements, thermostats, thermocouples, igniters or valves.
Flushing
Draining sediment to restore efficiency and reduce noise.
Tank replacement
Installing a new conventional or power-vented tank.
Tankless conversion
Switching to an on-demand unit; usually involves gas line and venting changes.
What affects the cost
Prices vary from job to job, so we don't publish fixed rates. These are the factors that usually make the biggest difference. Ask for quotes in Canadian dollars and confirm whether HST is included.
- Gas vs electric and the specific model
- Venting type (natural draft, power vent, direct vent)
- Whether you rent, own, or are buying out a rental
- Permits and gas work required for replacements
Read more: How much does a plumber cost in Oshawa?
Oshawa context
Gas water heaters in Ontario must be installed by a person holding the appropriate TSSA-recognized gas certificate. Ask anyone quoting gas work to confirm their certification.
Frequently asked questions
How long does a tank water heater last?
Many tanks last roughly 8 to 15 years depending on water quality, maintenance and model. Age alone isn't a reason to replace, but an old tank that starts leaking usually can't be repaired.
My water heater is rented. Who fixes it?
In most rental agreements, the rental company handles repairs and replacements. Check your agreement before hiring someone else.
Is a tankless water heater worth it?
It depends on your hot water use, gas service and venting. Read our tank vs tankless guide for the trade-offs.
Why does my hot water smell like rotten eggs?
This is often a reaction between the anode rod and bacteria in the tank. A plumber may suggest flushing or a different anode.
Can I flush my water heater myself?
Many homeowners do, following the manufacturer's instructions. Turn off power or gas first and be careful — the water is hot.
Request help with water heater repair
Describe the issue and we'll get right back to you with next steps. It's free to submit and there's no obligation.