Water heater not heating

Leave. Call the gas utility from outside.

1. Get everyone out Leave the door open behind you.
2. Don't make a spark No switches, phones or lighters inside.
3. Call from outside Your gas utility’s emergency line, or 911.

Likely a supply problem. Call the gas utility today.

1. Check for a notice from the utility A shutoff tag on the meter, a door hanger, or an outage message.
2. Call the gas utility Say no gas appliance works. They check the meter and supply.
3. Do not turn the meter valve yourself If the gas was shut off, only the utility or a qualified pro restores it and relights pilots.

When every gas appliance stops at once, the problem is upstream of the heater: the meter, the supply line or an account shutoff.

Not an emergency. Book a plumber this week.

1. Check the control knob is on and the temperature setting has not been turned down Do not open the burner cover.
2. Look at the lighting label on the heater If you are not comfortable following the manufacturer’s own instructions exactly, don’t: casaq does not cover gas-valve work.
3. Call a plumber Common causes are a failed thermocouple or flame sensor, a control valve, or a venting safety switch.

A pilot or burner that will not stay lit usually means a worn safety sensor or a draft/venting problem. The venting part matters: a heater that is not venting properly can spill carbon monoxide.

Leave it off. An electrician or plumber needs to look this week.

1. Leave the breaker off Resetting a breaker that trips again can overheat wiring.
2. Turn off the cold-water valve only if the tank leaks Otherwise the tank can stay full.
3. Call a plumber or electrician A shorted heating element, a failed thermostat or a wiring fault are the usual causes.

Fine for now. Watch for a repeat.

1. Give it an hour or two to heat a full tank A tank recovers from cold slowly.
2. Note the date in your log If it trips again, the pattern helps whoever repairs it.
3. If it trips again, leave it off and book a repair

A single trip can follow a power surge or a heavy load. Repeated trips are a fault.

Book a plumber this week.

1. Leave the breaker on only if nothing smells hot or burnt If it does, switch it off.
2. Check whether the reset button on the upper thermostat has tripped It sits behind a cover with live wiring. casaq does not cover opening it; a plumber does this in minutes.
3. Call a plumber A failed element or thermostat is common and repairable on a tank that is not leaking.

With power on and no heat, an element, a thermostat or the high-limit switch has usually failed.

Not urgent. Worth a look this month.

1. Check the temperature setting Someone may have turned it down. Around 120°F is a common setting that limits scald risk.
2. Spread out showers, laundry and dishwasher runs To see if it is a capacity problem rather than a fault.
3. Note the heater’s age from its label An older tank with sediment, or one failed element in an electric heater, often shows up this way.

Lukewarm water or a short supply usually means sediment, one failed element, a broken dip tube, or a tank too small for the household.