No hot water · Greeley, CO
No hot water in Greeley, CO: work out why, then who to call
Rotten-egg smell near a gas heater? Treat it as gas first.
Leave immediately and move a safe distance. Do not use anything that can spark, such as a light switch. Call 911 once you are clear, then your gas utility.
Cold water from the hot tap in a Greeley, CO home has more than one possible cause, and some of them are not the heater. This page is a short decision path for no hot water: one tap or all of them, what kind of heater you have, what a plumber checks, and where to go next. It does not walk through repairs. Call now to connect with a local plumber for help with no hot water in Greeley.
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Three questions
No hot water in Greeley: a two-minute decision path
These are the first questions a plumber asks on the phone. The answers separate a heater fault from a fault elsewhere in the hot-water path, and they narrow the cause before anyone opens a panel.
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Is the hot water missing at every tap, or at one?
Just one fixtureThat points away from the heater. See the causes outside the heater below, and tell a plumber which fixture it is.
Every hot tapThe heater, or the supply to it. Go on to question 2.
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Does it never get hot, or get hot and then fade?
Hot, then it fades or runs outScale, demand, a damaged dip tube or a failing element can all do this. See hot water that runs out, below.
Never gets hotGo on to question 3.
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Is it a tank heater or a tankless unit?
Outside the heater
When the heater is not the problem
Cold water at one fixture, or hot water that never gets fully hot, can come from parts between the heater and the tap. Review the component checklist below to identify the issue:
- A
The heater outlet
Hot water leaves the heater here. If every hot tap is cold, the heater side is where to look.
- B
A mixing valve or shower cartridge
It blends hot and cold at one fixture. A worn one can give cold or lukewarm water at that fixture only.
- C
A hot and cold cross-connection
A path between the two lines can let cold water into the hot. It can show up as hot water that never gets fully hot.
- D
A recirculation loop
Some houses have a loop that keeps hot water moving toward distant taps. A fault in it can put cold water into the hot line.
These are plumber checks. Note which taps are affected and when, and say so on the call.
By heater type
What a plumber checks, and what to note
For a tank that is not heating or a tankless unit that is not delivering. None of this is a repair guide. The parts are explained under water heater repair.
Gas tank
Cold water, and the burner is out or will not stay lit.
- A plumber checks the pilot or igniter, the thermocouple and the gas control, and finds out why the flame is not holding.
- Note whether it has gone out before, and when this started.
- This page gives no relighting steps. A heater that has gone out is a reason to find out why, not only to relight it.
A gas smell changes everything. See the strip at the top of this page.
Electric tank
Cold water, and the heater is electric.
- A plumber tests the supply to the heater and then the upper and lower heating elements and thermostats with a meter. A failed lower element, or a failed upper thermostat, can leave the tank cold or only lukewarm.
- A heater that keeps tripping its breaker has a fault, often a failed element that is shorting to the tank, and it should not be re-energized again and again. Tell the plumber what happened and whether it has happened before.
- Elements and thermostats sit behind panels with live wiring and next to a tank full of water, so leave them closed.
Tankless
Cold water, or hot water that cuts out.
- Write down any error code the unit shows. It helps the plumber.
- A tankless unit's output is rated in gallons per minute, so hot water that cuts out when several taps run can be a limit on demand.
- Scale can matter for a tankless unit. The manufacturer's instructions cover flushing.
Still cold? Call now to connect with a local plumber for help with no hot water in Greeley.
Call (970) 633-4799Lukewarm, or it runs out
Hot water that fades or runs out fast
A heater that works but cannot keep up has a few possible reasons. Which one applies is for a plumber to find.
Scale
Hardness minerals coat heating elements and the inside of tanks, and a large buildup slows heating. Hard water in Greeley
Demand
The household has grown, or more taps and appliances run at once than the heater was sized for.
A damaged dip tube
The dip tube carries cold water to the bottom of the tank. If it is damaged, cold water may mix in near the top.
A failing element or flame
On an electric tank, one failed element can leave less hot water than before. On a gas tank, a burner that is not firing properly can do the same.
Urgent, or can it wait?
How urgent is it?
A call to schedule
- No hot water, with no gas smell and no water leaking
- Hot water that fades or runs out
- Cold water at one fixture only
Say so at the start of the call
- A rotten-egg smell near a gas heater: leave first, as at the top of this page
- Water leaking from the heater or its pipes
Where it leads
Repair, replace, or something else
Add up what you found and pick the closest match.
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One fixtureCold at one tap only
The cause is likely at the fixture, not the heater: a mixing valve, a shower cartridge or a cross-connection. A plumber works at that fixture.
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A part has failedFlame, element, thermostat
A failed part can sometimes be replaced without replacing the heater. Water heater repair lists the parts and what a repair involves.
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The heater is the questionOld, failing, or too small
If the heater is old and failing in several ways, or no longer covers the household, replacement is the question to ask. Water heater replacement
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ScaleFading, noisy, slow to heat
Scale depends on how hard your water is, which only a measured number tells you. Hard water in Greeley
Tell the plumber: whether the heater is gas, electric or tankless; whether all taps or one are cold; when it started; whether anything tripped or showed an error code; and whether any water is leaking.
FAQ
No hot water: common questions
Why do I have no hot water but cold water works?
The heater may not be heating, or the problem may be outside it. Check whether every hot tap is cold or only one: one tap points to a mixing valve, a cartridge or a cross-connection, and every tap points to the heater or its supply. The decision path above sorts the rest.
Why does my hot water run out fast?
There are several possible causes: scale in the tank, more demand than the heater was sized for, a damaged dip tube, or a failing element or flame. A plumber can tell which. Water heater repair
Why is only one tap cold?
That points away from the heater. A worn mixing valve or shower cartridge, or a cross-connection, can leave one fixture cold or lukewarm. Tell the plumber which fixture it is.
Is no hot water an emergency?
On its own it is an inconvenience to fix. A gas smell is a gas emergency first: leave immediately, call 911 once you are clear, then your gas utility. Water leaking from the heater is a different problem, so say so on the call.
Should I relight the pilot myself?
This page does not give relighting steps. For a gas heater that has gone out, have a plumber find out why. If you smell gas at any point, leave and call 911 once you are clear.
Can a tripped breaker be the cause?
On an electric heater it can be. A breaker that trips again and again is a symptom of a fault, often a failed element shorting to the tank, and resetting it repeatedly does not remove the fault. Tell the plumber whether the heater has tripped before, and let the plumber test the circuit.
What should I do while waiting for a plumber?
Check whether one tap or all of them run cold, and note what kind of heater you have and whether any breaker has tripped. A gas smell is a gas emergency first: leave immediately and call 911 once you are clear.
Call about no hot water
Say whether the heater is gas, electric or tankless, and whether every hot tap is cold or only one.
Reviewed October 2026