No Hot Water? What to Check First

By the Westminster Emergency Plumber team · Updated September 2026

Start With How Much Hot Water You Have

There is a difference between no hot water at all and hot water that runs out far too quickly, and it points at different faults. None at all suggests the unit has stopped working: a pilot out, a tripped breaker, a failed element or a failed gas valve. Hot water that lasts five minutes when it used to last twenty suggests the unit is still running but something inside it is not working properly, such as one of two elements on an electric heater, or a dip tube that has broken down.

Check more than one fixture before you blame the heater. If only one faucet runs cold, the problem is at that fixture, not at the tank, and a cartridge or mixing valve is the more likely culprit.

Safe Checks on an Electric Unit

Look at the breaker panel. A water heater breaker that has tripped can be reset once, from a dry floor, if nothing around the heater is wet. If it trips again, stop. A breaker that keeps going is telling you something has failed inside the unit, and resetting it repeatedly is not a fix.

If there is any water around the base of an electric heater, do not touch the unit or the breaker at all. Water and a heating element circuit are a bad combination, and it is a short wait for someone who can isolate it properly.

Safe Checks on a Gas Unit

If you can smell gas anywhere near the heater, leave the house and call the gas utility from outside. Do not switch anything on or off on your way. That is the whole check.

If there is no gas smell and the area is dry, look at the pilot or the status light through the viewing window. Many units carry relighting instructions printed on the side, and following them once is reasonable. If the pilot lights and then goes out again, that usually points at a thermocouple or a flame sensor rather than anything you can adjust. Leave the gas control valve alone.

Tankless Units Behave Differently

A tankless heater that produces lukewarm water or cycles cold often shows an error code on its display, and that code is worth writing down before you call. Some are simple: a blocked inlet filter, a vent obstruction, or a unit that has locked out after a power interruption. Others point at the heat exchanger or the ignition system. A tankless unit also cares about flow rate, so if the problem only appears when two showers run at once, that is a capacity conversation rather than a fault.

Noises, Rust and Puddles

Rumbling or popping usually means sediment has settled on the bottom of the tank and water is boiling underneath it. That can often be flushed and is not automatically a reason to replace a unit. Rusty or metallic hot water, on the other hand, suggests the inside of the tank or the anode rod is going, and that is a more serious sign.

Water around the base needs identifying rather than mopping. If it is coming from a fitting, the relief line or the drain pan, it is usually repairable. If it is weeping from the tank shell itself, no repair closes it, and the unit has to be replaced. Our repair versus replacement comparison lays out what points each way.

Why Altitude Matters Here

One thing is specific to homes along the Front Range. Gas water heaters and furnaces have to be suitable for the elevation they are installed at, because there is less oxygen available for combustion than at sea level. It means a replacement is not always a straight swap for whatever is on the label of the old unit, and a proper quote covers the rating and the venting as well as the capacity. It is a fair question to ask any company quoting you a new heater.

Hard water is less of a story here than in a lot of the country, since the utilities in this area deliver mountain snowmelt water that is relatively soft. Sediment still collects, but scale is rarely the headline.

Hot Water Calls Around Westminster

A great many homes here keep the water heater in an unfinished basement utility room next to the furnace, which is a cold corner of the house in January and gives the unit more work to do. In older neighborhoods south of 104th Avenue those heaters are often on their second or third replacement, sitting on original connections. Newer homes north of the city, and in places like Broomfield, are more likely to have a newer unit with a fitting or a sensor problem instead.

Arrange an Inspection

If the safe checks have not restored hot water, stop there and call. Westminster Emergency Plumber tests the unit rather than swapping parts on a hunch, checks the gas or electrical supply feeding it, and prices the repair before touching it. Read what a visit covers on the water heater repair page, see how a service call works, or request a visit.