The most common sign of a frozen pipe is simple: you turn on a faucet on a cold morning and get a thin trickle or nothing at all. From there, the job is figuring out how much of the house is affected, where the ice is, and whether the pipe has already cracked. Thawing a pipe you can reach is often something a homeowner can handle. Thawing one that’s already split is how a no-water problem turns into a flooded basement, so check before you apply any heat.
Signs Your Pipes Are Frozen
Low or no water at a faucet is the clearest signal, especially when it happens overnight during a hard freeze and the fixture worked fine the day before. Pay attention to whether it’s one faucet or several, and whether it’s the hot side, the cold side, or both. That pattern tells you a lot about where the freeze is, which we’ll get to in the next section.
A toilet that won’t refill after flushing is another common tip-off. The fill valve depends on a supply line that often runs along an exterior wall, and it’s easy to miss until someone flushes and the tank stays empty.
If you can see the pipe, look at it closely. Frost on the outside of the pipe, a section that feels much colder than the rest, or a slight bulge are all signs that water inside has frozen. Bulging or visible cracks mean the pipe may already be damaged, which changes what you should do next.
How to Find Which Pipe Is Frozen
Frozen sections are usually in the parts of the house that get the least heat: crawl spaces, garages, attics, basements with little insulation, and pipes running through exterior walls or under sinks on an outside wall. When a Spokane cold snap drops overnight temperatures well below freezing, those are the spots to check first.
This process narrows it down fairly quickly:
- Test every faucet in the house. Check hot and cold separately at each sink, tub, and shower. If only one fixture is affected, the freeze is likely in the line feeding that fixture. If only the cold side stopped, focus on the cold supply line. If only the hot side stopped, the problem may be in the hot line or the line running to your water heater.
- If nothing works anywhere, look at the main line. No water at any fixture usually means the freeze is where the main line enters the house or near the meter. Check with a neighbor before you start hunting. If they’re out of water too, the problem may be on the utility’s side rather than inside your home.
- Check outdoor spigots. If the indoor faucets are weak and an outdoor spigot doesn’t work either, the line where water enters the house is a strong suspect.
- Trace the pipe from the faucet back. Start at the affected fixture and follow the supply line toward the coldest part of its route. Feel along the pipe for the section that’s noticeably colder, and look for frost.
- If you’re on a well, keep in mind that the freeze can also be in the line from the well or at the pressure tank and switch, especially if they sit in a well house, garage, or crawl space.
If every exposed pipe checks out and a fixture still isn’t getting water, the frozen section is probably inside a wall, floor, or ceiling. That’s the point where it makes sense to call a plumber rather than start opening drywall or applying heat blind.
Check for Damage Before You Thaw Anything
Before applying any heat, find your main water shutoff and make sure you can turn it. If the pipe has already cracked, the ice is often what’s holding the water back. Once it melts, water can pour out of the split.
Look along the pipe and the surrounding area for bulges, visible splits, dripping at fittings, or water stains on drywall and ceilings. Any of those signs mean you shouldn’t keep thawing. Shut off the main water and call for leak repair so the thaw and the repair get handled together.
How to Thaw a Frozen Pipe Safely
If the pipe is exposed and you don’t see signs of damage, you can usually thaw it yourself. Open the faucet the pipe feeds before you start, and leave it open. As the ice melts, running water helps clear the rest of the blockage, and the open faucet gives pressure somewhere to go instead of building up behind the ice.
Work from the faucet side toward the frozen section, so melting water has a clear path out. These are the safest heat sources for an exposed pipe:
- A hair dryer. Move it slowly back and forth along the pipe. It’s the easiest option for short sections under sinks or in a basement.
- A heating pad or electric heat tape. Wrap it around the frozen section and follow the product’s instructions. Heat tape is also useful for sections that freeze repeatedly.
- A space heater. Warming the whole area can help with pipes in a cold cabinet or small room. Keep it well clear of anything flammable, and don’t leave it running unattended.
- Warm towels. Soak towels in hot water, wring them out, and wrap them around the pipe. It’s slower, but it works on mild freezes.
Never use a torch, open flame, or fuel-burning heater to thaw a pipe. Beyond the fire risk, a torch can overheat the pipe and damage it. Be careful with any electrical device if there’s standing water nearby.
Keep applying heat until full water pressure comes back, then check the pipe and nearby walls over the next few hours for any sign of a leak. If you’re wondering whether you could skip all this and let the pipe thaw by itself, we cover that in Will Frozen Pipes Thaw on Their Own? The short version is that waiting leaves pressure building behind the ice for longer.
What to Do If a Frozen Pipe Already Cracked
If you find a split or water starts coming out as the pipe thaws, shut off the main water supply right away. Then open the lowest faucets in the house to drain what’s left in the lines, which takes pressure off the damaged section. If water is near outlets, electrical panels, or light fixtures, stay clear of that area and shut off power to it if you can do so safely.
Move anything valuable out of the way, and take photos of the damage before cleanup if you plan to file an insurance claim. A pipe repair clamp can slow a small leak on an exposed pipe until a plumber arrives, but it isn’t a permanent repair. Our guides on how to tell if a pipe burst and repairing a burst water pipe go into more detail on the next steps.
When to Call a Plumber
Some frozen pipes are a quick fix with a hair dryer. Others need a professional, and it’s usually clear which is which once you’ve done the checks above. It’s time to call when:
- The frozen section is inside a wall, floor, or ceiling, or you can’t find it.
- The whole house is out of water and the problem isn’t on the utility’s side.
- You see bulging, cracks, or water stains, or the pipe leaks as it thaws.
- Several lines are frozen at once.
- The same pipe freezes every winter.
That last one gets overlooked. A pipe that freezes repeatedly usually has a routing or insulation problem, like a supply line running through an uninsulated exterior wall or crawl space. Thawing it every January doesn’t fix that. A plumber can insulate, reroute, or protect the section so it stops happening.
Keeping It From Happening Again
Once the water is flowing again, a few simple habits help during the next cold stretch. Let faucets on exterior walls drip on the coldest nights, open cabinet doors under sinks so warm air reaches the pipes, and keep the thermostat at 55°F or higher, even when you’re away. Disconnect garden hoses before the first freeze, and insulate exposed pipes in crawl spaces, garages, and attics. Our guide on how to prevent pipes from bursting this winter covers prevention in more depth.
Need Help With a Frozen or Cracked Pipe?
If you can’t find the frozen section, the pipe is inside a wall, or it’s already leaking, Action Craft Experts can help. Our plumbers are licensed in Washington and Idaho and serve homes across Spokane, Spokane Valley, and North Idaho. For urgent problems, we can often schedule same-day or next-day service. Call us at 509-204-3335 or request an estimate online, and we’ll get you on the schedule
