Repair problem
No Hot Water Troubleshooting Guides
Published FixGraph guidance for diagnosing and responding to no hot water.
Matching published guides
Choose a guide that matches the service, equipment, and conditions you are seeing.
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Faucet has no hot water: isolate the fixture or the hot-water system
Compare the same faucet's hot and cold flow, then compare another faucet before assuming the faucet itself has failed.
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Faucet has no hot water: tell whether the tank or faucet is at fault
First compare this faucet with another hot-water outlet. If other outlets are hot, the fault is local to this faucet, its cartridge, or its hot-water supply path.
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Faucet Has No Hot Water: Trace the Hot-Side Supply Before Replacing a Gasket
First determine whether the problem affects one faucet or every hot-water outlet. If cold water flows normally at this faucet but hot water does not, compare another faucet, check that the hot-side stop valve is open, and inspect the accessible hot supply hose for a kink, leak, or compression.
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Shower Has No Hot Water After a Blizzard: Separate Frozen Pipes, Power, and Heater Faults
After a blizzard, a cold shower can come from a frozen branch serving the shower, a whole-house water or power interruption, a gas or electric water-heater shutdown, or a shower mixing valve that is limiting hot water. First ask whether hot water is also missing at a nearby sink; check only from a dry, safe location whether cold water flows and whether other fixtures are affected.
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Shower Has No Hot Water: Check the Shower Valve and Storage Tank
First determine whether the shower is the only fixture without hot water. If a nearby sink or tub tap becomes hot, the storage tank is probably working and the shower's mixing or thermostatic valve, cartridge, anti-scald setting, or hot-side supply is the better target.
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Shower has no hot water: isolate the fixture or water-heater path
First run a brief hot-water check at a nearby sink or tub. If other fixtures also stay cold, investigate the water-heater and whole-home hot-water path; if other fixtures are hot but the shower is cold, the shower mixing valve, cartridge, check stop, or supply connection is the more likely path.
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Sink Has No Hot Water: Check the Hot-Side Supply Before the Gasket
A sink gasket is a seal, not a heating element. If cold water works but this sink has no hot water, compare the hot side at another fixture, then check the sink's accessible hot shutoff, supply hose, faucet outlet, cartridge path, and visible leaks.
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Sink No Hot Water
When a sink has no hot water, first compare it with another hot-water fixture. If other fixtures are hot, inspect this sink's hot shut-off valve and supply line, then consider a faucet-side restriction; if the whole home is cold, the problem is upstream at the water heater or hot-water supply.
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Valve No Hot Water: Trace the Hot Supply Before Replacing the Cartridge
First compare the temperature and flow at other hot-water fixtures. If the whole home has no hot water, the water heater or building supply is the priority and a plumber or property manager should be contacted.
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Water Heater Has No Hot Water: Safe Checks and Service Boundaries
When a water heater has no hot water, first determine whether every hot fixture is cold or only one faucet or shower. Check the heater's external water valves and look for leaks, moisture, unusual noises, gas odor, smoke, or electrical warning signs without opening covers or testing live parts.
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What to check when a hot-water pipe has no hot water
Start by comparing hot-water flow and temperature at more than one fixture. If cold water flows normally but every hot tap is cold, the problem is more likely at the water heater, its heat source, a control, or a mixing arrangement than in one pipe.