No hot water · Peel Region, Ontario · Updated September 2026
No Hot Water in Ontario: 8 Checks Before You Call
The first question in Ontario is not gas or electric. It is whether you rent the tank, because that single answer decides who pays and who you are allowed to call.
Losing hot water is one of the few home faults where the cheapest correct move costs nothing and takes about two minutes. In Ontario a large share of homes do not own their water heater, and a rented tank is repaired by the rental provider at no charge. Before anything else, find out which one you have. If it turns out you own it and the fault is real, our water heater repair service covers Peel Region.
If you have no hot water in Ontario, check whether your tank is rented before you touch anything, because a rented unit is repaired free by the rental company and calling anyone else can void your agreement. If you own it, check the breaker on an electric tank or the pilot on a gas tank.
- Rented or owned: the check that comes first
- What the symptom tells you
- The 8 checks you can safely do yourself
- Who is allowed to do what in Ontario
- What your tank’s age changes
- Should you reset, call, or check your contract?
- Watch: service across Peel Region
- Frequently asked questions
- The short version
- Sources and references
Rented or owned: the check that comes first
In Ontario, a water heater that is rented is the rental provider’s responsibility to repair, usually at no cost to you, and calling an outside contractor can breach the agreement. This is the single biggest difference between Ontario advice and the American troubleshooting pages that dominate search results, and none of them mention it.
Three ways to tell in under two minutes. Look for a rental provider sticker on the tank itself, usually near the top or on the front panel. Check your natural gas or electricity bill for a monthly water heater rental line. Check whether a rental contract came with the house at closing, which is common on resale homes in Mississauga and Brampton.
| Situation | Who you call | What it typically costs you |
|---|---|---|
| Tank is rented | The rental provider named on the sticker or bill | Nothing. Service is part of the rental agreement |
| Tank is owned, out of warranty | A licensed contractor of your choice | A service call plus parts |
| Tank is owned, still under manufacturer warranty | The installing contractor or the brand’s dealer network | Parts often covered, labour usually not |
| You are not sure | Check the sticker and your utility bill first | Two minutes |
Do not book a paid repair on a tank you rent. Find the sticker or the rental line on your bill first. If it is rented, the correct call is to the provider, and it is free.
What the symptom tells you
The pattern of the failure narrows the cause faster than any single test. No hot water at all points at a power or fuel supply problem, while hot water that runs out early points at a component that is still working but only partly.
| What you notice | Electric tank | Gas tank |
|---|---|---|
| No hot water at all, sudden | Tripped breaker or a tripped high-limit reset | Pilot out, gas supply off, or a tripped thermal switch |
| Hot water runs out much faster than it used to | Lower heating element failed | Sediment buildup reducing usable capacity |
| Water is warm but never hot | Upper element or thermostat fault | Thermostat set low, or a partly blocked burner |
| Rumbling or popping from the tank | Sediment on the element | Sediment on the tank floor |
| Water around the base of the tank | Stop. A leaking tank body is not a repair. See the safety note below | |
The 8 checks you can safely do yourself
Every check below is something a homeowner may do without a licence, using nothing more than a flashlight. Anything requiring a multimeter inside a live panel, or work on a gas control, is not on this list on purpose.
| # | Check | Applies to | What good looks like |
|---|---|---|---|
| 1 | Confirm whether the tank is rented | Both | You know who to call |
| 2 | Check other taps, and hot only | Both | If one tap is cold, the tank is fine and the fixture is the fault |
| 3 | Look at the breaker panel for a tripped double-pole breaker | Electric | Breaker is fully on, not sitting mid-travel |
| 4 | Look through the viewing window for a lit pilot | Gas | A steady blue flame |
| 5 | Confirm the gas shutoff at the tank is open | Gas | Handle runs in line with the pipe |
| 6 | Read the thermostat dial setting | Both | Set to the manufacturer’s normal mark, not vacation or pilot |
| 7 | Check whether anyone reset a mixing valve or the dial recently | Both | Nothing changed since hot water last worked |
| 8 | Look at the floor around the tank and the drain pan | Both | Completely dry |
If you reach the end of that list with nothing found, the fault is inside the appliance and the next step belongs to a licensed technician. Relighting a pilot is the one exception and only when you follow the lighting instructions printed on the tank itself, exactly as written, and the flame stays lit afterwards.
You smell gas anywhere near the tank, in which case leave the building first and call from outside. Your carbon monoxide alarm is sounding. Water is pooling from the tank body rather than a fitting. The pilot will not stay lit after two attempts, which can mean a safety device is doing its job and should not be bypassed. A gas water heater that repeatedly drops its pilot is telling you something about combustion air or venting, and that is a licensed technician’s call in every case.
Who is allowed to do what in Ontario
Ontario regulates work on fuel-burning appliances, so the boundary between a homeowner task and a technician task is a legal line, not a matter of confidence. The Technical Standards and Safety Authority, TSSA, administers fuels safety in the province, and gas work is restricted to certified people. Four separate bodies licence different parts of the work in an Ontario home, and a gas water heater sits squarely under the first one.
| Task | Who may do it |
|---|---|
| Resetting a tripped breaker | Homeowner |
| Relighting a pilot per the instructions printed on the tank | Homeowner |
| Adjusting the temperature dial | Homeowner |
| Replacing a heating element or electric thermostat | A qualified trade person. Wiring, breakers and disconnects fall to a Licensed Electrical Contractor, ECRA/ESA numbered |
| Any work on a gas valve, burner, thermocouple, venting or combustion air | A TSSA-certified gas technician holding certificate G.3, G.2 or G.1 |
| Replacing the tank | A TSSA-certified gas technician for gas units, and a licensed installer for electric |
Aire One Peel is a TSSA-registered fuels contractor, licence FS R0076624709. That registration is what allows our technicians to open a gas control on your tank legally. It is worth asking any contractor for theirs before they touch a gas appliance in your home.
What your tank’s age changes
Age does not cause a specific fault, but it changes whether repairing one is a sensible use of money. The data plate on the side of the tank carries the manufacture date, usually inside the serial number.
| Tank age | Repair usually makes sense | What to weigh |
|---|---|---|
| Under 6 years | Yes | Check the manufacturer warranty first, parts are often still covered |
| 6 to 10 years | Usually | Repair once, but start planning. Ask what failed and why |
| Over 10 years | Depends on the fault | An element is cheap, a leaking tank is terminal |
| Any age, leaking from the tank body | No | The tank is done. Replacement is the only option |
Should you reset, call, or check your contract?
Three questions, one answer
Is there a rental sticker on the tank, or a water heater rental line on your utility bill?
Is there any water on the floor around the tank, or is a CO alarm sounding?
Which do you have?
Call your rental provider, not us
The tank is not yours to repair. The provider named on the sticker or your bill has to fix it, normally at no cost, and hiring anyone else can breach the agreement. Keep the account number handy when you call.
Stop and treat this as urgent
Water pooling from the tank body or a sounding carbon monoxide alarm is not a troubleshooting situation. If the alarm is sounding, get everyone outside first and call from there. Shut the water supply to the tank if you can reach the valve safely.
Check the breaker, then the reset
Go to the panel and look for a tripped double-pole breaker. Switch it fully off and back on. If it trips again, stop there and book a technician, because a breaker that keeps tripping is reporting a fault rather than causing one.
Check the pilot and the gas valve
Look through the viewing window for a steady blue flame and confirm the shutoff at the tank runs in line with the pipe. Relight only by the instructions printed on the tank. If it will not stay lit after two attempts, that is a licensed technician’s job.
Watch · Aire One Peel
Company introduction from Aire One Peel Heating and Cooling, serving Peel Region and the west GTA.
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Still no hot water after the checks?
If you own the tank and the list above did not find it, the fault is inside the appliance. We serve Mississauga, Brampton, Etobicoke, Milton, Georgetown, Caledon and Bolton, with 24/7 availability and free in-home estimates.
Book a free in-home estimate Water heater repair905-564-8545 · 1625 Courtneypark Dr E, Mississauga, ON L5T 1V9
Frequently asked questions
What is the first thing to check when there is no hot water?
Check whether the tank is rented. In Ontario a rented water heater is repaired by the provider at no cost, and calling an outside contractor can breach your agreement. Look for a sticker on the tank or a rental line on your utility bill before doing anything else.
Why do I suddenly have no hot water electric water heater?
A sudden total loss of hot water on an electric tank is usually a tripped double-pole breaker or a tripped high-limit reset. Check the panel first. If the breaker trips again straight after you reset it, stop and book a technician, because it is reporting a fault rather than causing one.
Is there a reset button on a hot water heater?
Electric tanks have a red high-limit reset button behind the upper access panel. It exists as a safety cutout, so a tank that trips it repeatedly has an underlying fault. Pressing it more than once without finding the cause is not a fix, and gas tanks have no equivalent button.
How to troubleshoot a water heater with no hot water?
Work in order: confirm ownership, confirm the problem is not one fixture, then check the breaker on an electric tank or the pilot and gas shutoff on a gas tank. Check the thermostat setting and look for water on the floor. Anything past that belongs to a licensed technician.
How to fix a non-working water heater in Ontario?
Homeowners in Ontario may reset a breaker, adjust the temperature dial, and relight a pilot using the instructions printed on the tank. Work on a gas valve, burner, thermocouple or venting is restricted to a TSSA-certified gas technician, so those repairs are not a do-it-yourself job here.
Does a leaking water heater need replacing or repairing?
Water coming from the tank body means the steel shell has corroded through and the tank must be replaced. A drip from a fitting, valve or connection above the tank is often repairable. The difference is where the water starts, so trace it upward before assuming the worst.
The short version
Find out whether you rent the tank before anything else, because that answer alone decides whether this costs you nothing or costs you a service call. If you own it, the eight checks above resolve most sudden no-hot-water faults, and the ones they do not resolve are the ones Ontario law reserves for a certified technician anyway. Water on the floor or a sounding CO alarm skips every step and becomes an emergency call.
Sources and references
- Technical Standards and Safety Authority, fuels safety program and public registry. tssa.org
- Skilled Trades Ontario, compulsory trades list including 313A and 313D. skilledtradesontario.ca
- Electrical Safety Authority, licensed electrical contractor requirements in Ontario. esasafe.com
- Health Canada, guidance on domestic hot water temperature and scald risk. canada.ca
- Natural Resources Canada, water heater efficiency and equipment guidance. natural-resources.canada.ca
Applies to homes in Mississauga, Brampton, Etobicoke, Milton, Georgetown, Caledon and Bolton. Rental arrangements and provider names vary by household, so check your own sticker and bill rather than assuming.