Common symptoms
- Gas tank, nothing hot: pilot out, thermocouple or gas valve fault, or venting problem
- Runs out quickly: failed lower element on electric, sediment on gas, or a broken dip tube
- Rumbles and pops: grit at the tank floor flashing to steam
- Rusty hot water: sacrificial anode used up, tank corroding
- Water at the base: may come from the T&P valve, a connection or the shell
Ownership first
Plenty of Vaughan tanks are rentals. Spot a rental provider's label on yours? call them first; repairs on a rental are often their responsibility. Own it, or unsure? Phone and we will work it out together.
How we diagnose
- Verify gas or power is reaching it and the dial is set right.
- Inspect the burner, pilot assembly and flame, or put a multimeter on the elements and thermostats.
- Look at the venting for spillage and blockage on gas units.
- Test the temperature and pressure relief valve.
- Check the tank for leaks and age, using the serial number to date it.
If the leak is from the tank body, it cannot be repaired. Turn off the gas or power and the cold supply, and call for replacement.
Repair or replace?
A thermocouple or element on a sound tank is worth fixing. A tank near the end of its expected life with a leak or corrosion is not. See gas water heater replacement and signs your heater is failing.
What we open up on this job
| Part | Where we find it | What we do |
|---|---|---|
| Gas tank, natural draft | 40 or 50 US gal., older bungalows and splits | Thermocouple, pilot, venting and draft test |
| Power-vented tank | Common in 1990s–2000s Vaughan subdivisions | Blower, pressure switch, PVC vent check |
| Electric tank | Condos and some basement suites | Elements, thermostats, wiring at the top panels |
| Tankless combi | Newer custom homes | Descale with pump and vinegar, clean inlet screen |
Signs it is time to call
- Showers going cold sooner than last winter
- Crackle and knock from sediment as it heats
- Brown tint on the hot side alone
- A puddle forming beneath the tank
- Pilot will not stay lit
On the truck for this one
- Manometer for gas pressure
- Combustion and CO tester
- Element wrench and multimeter
- Hose for draining the tank
- Descaling pump kit
Quick answers
Can you work on rented tanks?
We can advise, but repairs on rental equipment should go through the rental company under most agreements.
Is a leaking relief valve dangerous?
It is a safety device; constant dripping points to excess pressure, excess heat or a tired valve. Have it checked.