What usually causes it
- Failed heating element or thermostat (electric heaters)
- Pilot light out or faulty gas control valve (gas heaters)
- Tripped breaker or blown fuse
- Heavy sediment reducing the tank's output
- A leaking tank that has reached the end of its life
- On tankless units: a flow sensor, ignition or scale problem
What you can safely check
- Check the breaker for an electric heater — reset it once; if it trips again, stop and call
- For gas, look through the sight glass: is the pilot lit? Relight it only if you are comfortable following the printed instructions on the unit
- Check the thermostat is set sensibly (around 120°F)
- Look at the floor around the heater — water there changes the diagnosis completely
When to call a plumber
Call if the breaker trips again, the pilot will not stay lit, you smell gas (in that case leave and call your gas utility first), the tank is leaking, or the unit is more than about ten years old and producing rusty water. We will test the components, tell you what failed, and give you an honest repair-versus-replace picture based on the unit's age and condition.
The service that usually handles this: Water Heater Repair. We handle no hot water calls across White Plains and Westchester County — including White Plains, Scarsdale and Yonkers.
Questions about no hot water
Why do I have some hot water, but it runs out fast?
That pattern points to a failed lower element on an electric tank, a broken dip tube, or heavy sediment taking up tank volume. The heater is working at partial capacity — repairable in most cases.
My tankless heater shows an error code. What now?
Write the code down before resetting anything — it tells the technician exactly which system complained. Scale buildup is the most common cause in our area; descaling is routine maintenance for tankless units.