March in Minnesota is a tricky month. It’s not quite winter, not quite spring—just a back-and-forth battle of melting during the day and refreezing at night. For homeowners in Marshall and across Southwest Minnesota, that temperature swing creates the perfect conditions for one of the most common (and surprising) plumbing problems of the year: leaks from thawing frozen pipes.

Why Frozen Pipes Start Leaking in March

When temperatures rise above freezing during the day and drop again at night, your plumbing system is under stress—especially older or exposed pipes. Here’s what’s happening behind the scenes:

• Freeze–thaw cycles cause pipes to expand and contract repeatedly, weakening fittings and creating microfractures.
• Ice inside a pipe blocks normal water flow and increases pressure behind the blockage.
• Pipes often don’t burst during the freeze —the real damage shows when they thaw and water finally rushes through.

The result? A pipe that seemed “fine all winter” suddenly leaks, drips, or bursts in March.

Common Signs Your Pipes Are Leaking After a Freeze

Homeowners often notice problems days—or even weeks—after a cold snap has passed. Look for these early warning signs:

• Water stains appearing on ceilings or walls
• Dripping sounds in floors or behind drywall
• Reduced water pressure in sinks or showers
• Musty smells near cabinets, basements, or crawlspaces
• Unexpected puddles near water heaters or appliances

If you experience any of these, don’t wait—damage spreads quickly as the thaw continues.

What to Do When a Frozen Pipe Finally Thaws and Starts Leaking

If you notice a leak or suspect a pipe has cracked, here’s what to do next:

1. Shut Off the Water

Locate your home’s main water shutoff valve. Turning it off immediately can prevent flooding and minimize damage.

2. Open Faucets to Relieve Pressure

This helps water drain out of the system and reduces the chance of additional leaks forming.

3. Check the Area for Electrical Risks

If water is near electrical outlets, appliances, or the breaker panel, stay clear and call for emergency help.

4. Document Any Damage

Take photos for insurance purposes, especially if carpets, drywall, or personal belongings are affected.

5. Call a Licensed Plumber

Even small cracks can worsen quickly. The freeze–thaw cycle typically continues through March, so a temporary fix may not hold.

Why March Is the Best Time for a Plumbing Inspection

At Bisbee Plumbing & Heating, we recommend a professional checkup during March because:

• Pipes weakened over winter often fail during the spring thaw
• Early detection prevents major water damage when temperatures rise
• Sump pumps and drainage systems are about to face heavy spring workload

Addressing issues now means fewer surprises when April snowmelt and rain put extra stress on your system.

Protect Your Home Before Leaks Turn Into Flooding

Since 1967, our team has helped Minnesota homeowners navigate the seasonal plumbing challenges that come with our unpredictable climate. If your pipes are thawing—or you’re seeing new leaks—acting quickly can save you thousands in repairs.

Have leaks after a freeze? Need a March plumbing inspection?
Call Bisbee Plumbing & Heating at (507) 537-0596 or schedule service at bisbeeph.com.