Only one faucet has no water
Other sinks or toilets work, but one faucet gives nothing or just a weak spit.
Start here: Start at the fixture: confirm both local shutoff valves are open and check the faucet aerator for debris.
Frozen pipe follow-up
Pipe Thawed but No Water
Direct answer: If a pipe thawed but you still have no water, the usual reasons are a section that is still frozen, a shutoff valve that is closed or partly closed, debris packed into the faucet aerator after thawing, or a split pipe that made someone shut the line off upstream.
Most likely: Start by figuring out whether the problem is one fixture, one branch, or the whole house. One fixture points to the faucet or a local stop valve. Several fixtures on the same side of the house usually means one branch is still blocked with ice or has been shut off after a leak.
This one fools a lot of homeowners because the room feels warmer and the pipe no longer looks frosty, but a cold plug can still be sitting deeper in the wall or crawl space. Reality check: a pipe can be partly thawed and still act fully blocked. Common wrong move: replacing the faucet when the branch line upstream still has no flow.
Don’t start with: Do not crank harder on frozen valves, do not use a torch or open flame, and do not buy random faucet parts until you know whether water is reaching that fixture.
If only one faucet is deadCheck its shutoff valves and remove the faucet aerator before assuming the pipe is still frozen.
If several fixtures lost water togetherTreat it like a branch-line problem first and look for the coldest exposed section, closed valve, or signs of a split pipe.
Last reviewed: 2026-04-04
What you’re seeing
One room or side of the house has no water
A bathroom, kitchen run, or laundry area is dead while the rest of the house works.
Start here: Look for one branch shutoff, one still-frozen section, or a leak that caused someone to close that branch.
Cold works but hot does not, or the reverse
One side of the faucet flows and the other side stays dry.
Start here: Treat the dead side as its own line and trace that hot or cold branch back to the nearest exposed section and valve.
No fixtures have water after thawing
The whole house is dry or nearly dry even though the freeze seems over.
Start here: Check the main shutoff, pressure source, and whether the water was turned off because a pipe split during the freeze.
Most likely causes
1. A section of pipe is still frozen farther back
This is the most common reason when the room warmed up but water still will not move. The ice plug is often in a wall, crawl space, cabinet back, or near an exterior penetration.
Quick check: Feel along any exposed pipe for one sharply colder spot, frost, sweating, or a sudden temperature change.
2. A shutoff valve is closed or only partly open
During a freeze, people often close a local stop, branch valve, or the main to limit damage, then forget to reopen it fully.
Quick check: Check the fixture stops, any branch shutoff serving that area, and the main valve position.
3. The faucet aerator or cartridge is packed with debris
Mineral flakes and loosened scale often break free after thawing and can block one faucet even when the pipe behind it has pressure.
Quick check: Remove the faucet aerator and briefly test flow into a bucket or large cup.
4. The pipe split during the freeze and the line was shut off
If water has not returned to one branch at all, there may already be a crack or burst section upstream that someone noticed or that is leaking into a wall or crawl space.
Quick check: Look for damp drywall, dripping sounds, fresh stains, wet insulation, or a valve that is now closed when it used to be open.
Step-by-step fix
Step 1: Figure out whether this is one fixture, one branch, or the whole house
You do not want to tear into a wall for a faucet problem, and you do not want to replace a faucet when the branch line upstream is still blocked.
- Test cold and hot at the problem fixture.
- Test the nearest other fixtures on the same floor and on the opposite side of the house.
- Flush a toilet or run a tub spout if available to see whether the issue is isolated or shared.
- If the whole house is affected, check whether the main water shutoff is open and whether your water source is actually on.
Next move: If you narrow it to one fixture, stay at the fixture first. If several fixtures are dead together, move upstream and treat it as a branch-line problem. If you cannot tell what area is affected, assume a larger branch issue and start tracing the supply line from the dead fixtures back toward the warmer interior.
What to conclude: The size of the outage tells you where to look. One fixture usually means a local valve or faucet blockage. Multiple fixtures usually means one shared line is still blocked or shut off.
Stop if:
- You hear water running inside a wall or ceiling.
- You find active leaking, wet insulation, or bulging drywall.
- The main shutoff will not move without heavy force.
Step 2: Check every valve that feeds the dead fixture or branch
Closed valves are common after freeze events, and they are much easier to fix than a hidden ice plug or burst pipe.
- At a sink, confirm the hot and cold fixture shutoff valves are turned fully open.
- Look for a branch shutoff in the basement, crawl space, utility room, or under a nearby cabinet.
- If the whole house is affected, confirm the main shutoff is fully open.
- Turn valves gently. If a handle is stiff, stop rather than forcing it.
Next move: If water returns after opening a valve, let the line run at a moderate stream for a few minutes and then inspect carefully for leaks along the thawed area. If all valves are open and the fixture or branch is still dry, move to the faucet blockage check or trace the line for a remaining frozen section.
What to conclude: A closed or partly closed valve can mimic a frozen pipe exactly, especially when only one room or one side of the house is affected.
Step 3: If it is one faucet, rule out a blocked aerator or faucet internals
After a thaw, loosened mineral grit often plugs the faucet outlet first. That is a fast, low-risk check.
- Place a towel in the sink so small parts do not fall into the drain.
- Unscrew the faucet aerator by hand or with pliers over a cloth to protect the finish.
- Rinse the screen and parts with warm water and mild soap if they are gritty.
- With the aerator off, crack the faucet open briefly and watch whether water now comes out of the spout.
- If one side still has no flow, compare hot versus cold to see whether only one supply is blocked.
Next move: If flow returns with the aerator removed, clean it thoroughly and reinstall it. If the faucet still runs poorly only after reinstalling, replace the faucet aerator. If there is still no flow with the aerator off, the blockage is farther back at the shutoff, supply tube, faucet cartridge, or the branch line itself.
Step 4: Trace the line for one remaining cold plug and warm it safely
A pipe can feel thawed near the fixture but still be blocked at the coldest hidden section. You want to find the first truly cold spot, not just the nearest exposed pipe.
- Open the affected faucet slightly so pressure has somewhere to go if the blockage clears.
- Check exposed pipe in basements, crawl spaces, garages, cabinets on exterior walls, and near sill plates or foundation penetrations.
- Feel for one section that is much colder than the rest or shows frost, condensation, or a hard cold band.
- Warm that area gradually with room heat, a hair dryer on a low setting, or warm towels changed often.
- Keep heat moving and work from the faucet side back toward the colder section when possible.
Next move: If flow starts returning, keep the faucet running at a moderate stream until full flow is back, then inspect the entire thawed section for drips or sweating that turns into a leak. If you cannot find the cold spot, or the line stays dry after safe warming, assume a hidden freeze or a shutoff caused by a split pipe and move to leak checks and pro help.
Step 5: Look for signs the line split during the freeze and act on what you find
Once a frozen line thaws, the real damage often shows up. Restoring pressure into a cracked pipe can soak framing, insulation, and ceilings fast.
- Inspect below and around the suspected freeze area for drips, stains, wet cabinets, wet flooring, or dripping in the crawl space or basement.
- Listen for a hiss or steady water sound behind walls after opening the supply.
- If you find a leak on an accessible branch, shut the water back off and isolate that branch if possible.
- If no leak is visible but the branch still has no water, plan for a hidden freeze or failed valve and call a plumber rather than forcing more pressure into it.
- After repairs or confirmed thawing, protect the area with pipe insulation and correct the cold-air exposure that caused the freeze.
A good result: If you find and isolate the damaged section, keep the water off to that branch until the pipe is repaired, then reinsulate before the next cold snap.
If not: If you still have no water and no visible leak, the safest next move is a plumber with leak detection and access tools for the hidden section.
What to conclude: At this point the easy checks are done. The remaining causes are usually a hidden ice plug, a failed shutoff valve, or a split pipe in a concealed space.
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FAQ
Why is there still no water if the pipe looks thawed?
Because the ice plug is often not where you can see it. The exposed section may be thawed while a colder section deeper in the wall, crawl space, or near an exterior penetration is still solid. A closed valve or clogged faucet aerator can look the same from the fixture end.
Should I leave the faucet open while thawing?
Yes, slightly open is usually best. That gives melting ice somewhere to go and helps you notice when flow starts returning. Do not walk away from it if there is any chance the pipe split during the freeze.
Can a frozen pipe thaw and then still be blocked by debris?
Yes. Mineral scale and sediment can break loose during a freeze-thaw event and pack into a faucet aerator or sometimes the faucet internals. That is why one dead faucet should be checked at the aerator before you assume the whole line is still frozen.
What if cold water works but hot water does not?
Treat the hot side as its own line. Check the hot shutoff valve at the fixture, then trace the hot branch back toward the water heater side for a remaining frozen section or a valve that was closed during the freeze response.
When should I call a plumber?
Call when several fixtures on one branch are still dry after the easy checks, when you suspect a hidden frozen section in a wall, when a valve is seized or leaking, or when you see any sign the pipe split. At that point the risk of water damage is higher than the value of pushing farther on your own.