Trusted Home Repair Diagnosis Guides

Symptom Guides · plumbing

Kitchen Sink Draining Slowly?

A kitchen sink drains slowly because grease and food debris have built up inside the P-trap and drain arm, narrowing the pipe. Cleaning the trap and running a hand auger clears it in most cases.

Symptom Guides · plumbing

Kitchen Sink Drain Gurgling Suddenly?

A kitchen sink gurgles suddenly because air is being pulled through the P-trap, usually from a partial drain clog or a blocked plumbing vent. Clear the trap and run hot water first; call a plumber if it keeps returning or you smell sewer gas.

Symptom Guides · plumbing

Kitchen Sink Drains Slow Then Clears

Intermittent standing water in a kitchen sink is almost always a partial clog, usually grease and food debris coating the drain pipe. It backs up when the passage narrows and clears when the buildup shifts, so it comes and goes until you remove the buildup.

Symptom Guides · plumbing

Kitchen Sink Drain Smells Getting Worse

Your kitchen sink drain smells worse over time usually because grease and food have built up inside the pipe and disposal, or because sewer gas is leaking past a dry or damaged P-trap.

Symptom Guides · plumbing

Trap Leaking After a Sink Renovation?

Your kitchen trap leaks after a renovation because the new sink or cabinet shifted the drain alignment, leaving a slip-joint connection loose, crooked, or missing its washer. Reseat the trap, replace the washer, and hand-tighten the nuts.

Symptom Guides · plumbing

Slow Sink Drain in an Older Home

Your older-home bathroom sink drains slow because hair and soap scum have built up on the pop-up stopper and in the P-trap, and old galvanized or cast iron pipes have narrowed from decades of internal corrosion, so debris that would pass a modern line gets stuck.

Symptom Guides · plumbing

Sink Drains Slow During Heavy Rain

A bathroom sink that clogs during heavy rain usually has a blocked plumbing vent or a compromised drain line letting groundwater in, not a simple hair clog. The clog is a symptom of a system problem that typically needs a licensed plumber and a camera inspection.

Symptom Guides · plumbing

Upstairs Bathroom Sink Backs Up

An upstairs-only bathroom sink backup usually points to a localized clog in the P-trap or drain line serving that fixture, though branch venting or partial pipe blockages can also be involved. Because diagnosing and clearing this safely often requires a drain machine and proper access, this one calls for a licensed plumber.

Symptom Guides · plumbing

Downstairs Bathroom Sink Trap Leak

A downstairs bathroom sink trap leaks most often because a slip nut has loosened, a rubber washer has hardened, or the trap itself has cracked or corroded. Tighten the nuts by hand first, then replace the washers if it still drips.

Symptom Guides · plumbing

Weak Toilet Flush on Windy Days

A toilet that flushes weak only when it's windy usually has a blocked or poorly terminated plumbing vent. Wind disrupts the air pressure the toilet needs to build a strong siphon.

Symptom Guides · plumbing

Toilet Rocking at the Base in Winter

A toilet rocks in winter because dry indoor air shrinks the wood subfloor and old wax or caulk, exposing loose closet bolts or a weakened flange. Tighten the bolts gently and shim the base level; if it stays loose, the flange or subfloor needs repair.

Symptom Guides · plumbing

Toilet Wax Ring Leaking in Summer

A summer wax ring leak happens when heat softens an already-worn seal and humidity keeps the subfloor damp, letting water escape around the toilet base. The fix is pulling the toilet and installing a new wax ring or wax-free seal.

Symptom Guides · plumbing

Standing Water in Shower Drain

Standing water in a shower drain is almost always a hair-and-soap clog in the trap or branch drain. Clear the visible blockage first; if it persists or affects other fixtures, it's likely a main line issue that needs a plumber.

Symptom Guides · plumbing

Sudden Sewage Smell From Shower Drain

A sudden sewage smell from a shower drain is most often a dried-out P-trap that's stopped blocking sewer gas. Pour a quart of water down the drain to refill the trap; if the smell returns, suspect a venting issue or a drain-line problem.

Symptom Guides · plumbing

Shower Drain Clogs On and Off?

Your shower drain clogs intermittently because a hair-and-soap mat has formed near the drain or p-trap. It shifts position, so water gets past some days and backs up on others. Remove it with a plastic drain zip tool.

Symptom Guides · plumbing

Grout Cracks Near Shower Drain

Grout near a shower drain cracks and keeps worsening because the tile or drain assembly is moving. Common causes are a loose drain body, a deteriorating mortar bed, or a hidden leak softening the substrate beneath the tile.

Symptom Guides · plumbing

Low Pressure Tub Faucet (Older Home)

An older home's bathtub faucet loses pressure mainly from rust and mineral scale clogging aging galvanized pipes, a mineral-blocked tub spout, or a worn mixing valve cartridge.

Symptom Guides · plumbing

Upstairs Tub Spout Leaking Only?

An upstairs bathtub spout leak is usually caused by a worn valve cartridge, a failing spout diverter, or a loose spout connection. It matters more upstairs because escaping water can damage the ceiling below.

Symptom Guides · plumbing

Downstairs Drains All Backing Up?

Multiple downstairs drains backing up at once means your main sewer line is blocked, since all fixtures share that pipe. Stop using water and get it snaked or hydro-jetted before the backup floods the lowest drains in your home.

Symptom Guides · plumbing

Sewage in Yard, Worse When It's Windy

Sewage surfacing in your yard means your main sewer line is cracked, offset, or blocked underground and waste is escaping into the soil. Wind just carries the odor to you first.

Symptom Guides · plumbing

Toilets Gurgle After Power Outage

Toilets gurgle after a power outage because the outage stopped a sewage ejector, grinder, or septic pump that your drains rely on. Check whether the pump lost power or tripped a breaker before calling a pro.

Symptom Guides · plumbing

Slow Whole-House Drains in Winter

Slow drains throughout the whole house in winter point to a partial main sewer line blockage, often congealed grease or a frozen section, rather than a clog at one fixture.

Symptom Guides · plumbing

Sewer Odor That Gets Worse in Summer

Summer sewer odor from your main line is most often a dried-out P-trap in an unused drain or a venting problem worsened by heat. Refill every trap with water first, and if the smell returns, get the main line camera-inspected.

Symptom Guides · plumbing

Why Is My Tap Water Discolored?

Discolored water usually means rust or sediment stirred up in your pipes or the city main, not a health emergency. Run the cold tap 5 to 10 minutes; if it clears, no repair is needed.

Symptom Guides · plumbing

Sudden Pinhole Leak in a Supply Line

A sudden pinhole leak in a water supply line is usually caused by internal pipe corrosion (pitting) in copper, or a defect in a fitting or PEX crimp. Shut off the water and repair the section; a temporary clamp buys time but isn't a permanent fix.

Symptom Guides · plumbing

Pipe That Freezes Only Sometimes

A water supply line freezes intermittently because one short section sits in a cold spot that only drops below freezing under certain conditions (wind, an open door, or a nighttime temperature setback), not because the whole line is cold.

Symptom Guides · plumbing

Disposal Hums But Won't Grind?

A garbage disposal that hums but doesn't grind almost always has a jammed flywheel. The motor has power but can't spin. Cut power, then turn the flywheel free with the hex wrench slot on the bottom of the unit.

Symptom Guides · plumbing

Disposal Leaks From Bottom After Reno

A garbage disposal leaking from its bottom after a renovation usually has a failed internal seal, which isn't repairable. The unit was likely reinstalled or knocked during the work, so it needs to be replaced.

Symptom Guides · plumbing

Older Home: Smelly Garbage Disposal

Your garbage disposal smells because food debris is rotting on the splash guard, in the grinding chamber, or in a clogged trap. Clean all three, and if the odor smells like sewage instead of rot, check for a dry or failing trap.

Symptom Guides · plumbing

Upstairs Washing Machine Hose Burst

Your upstairs washing machine supply hose burst because the rubber aged and weakened under constant water pressure, and upstairs lines cause worse flooding since water drains straight through the ceiling below. Shut both supply valves immediately, then replace the hose.

Symptom Guides · plumbing

Downstairs Washer Filling Slowly?

A downstairs-only slow fill on a washing machine is usually caused by clogged inlet screens, a partly closed supply valve, or a kinked fill hose, all of which are cheap DIY fixes under $90.

Symptom Guides · plumbing

Winter Flood From Washer Supply Valve

Your washing machine supply valve is flooding in winter because a freeze cracked the valve body or the cold contracted the metal and blew out the stem seal. Shut off the water and replace the valve; frozen cracks can't be repaired.

Symptom Guides · plumbing

Hose Bib Dripping After You Shut It Off

Your outdoor hose bib drips when off because the rubber washer or valve seat inside has worn out, or a hose left attached is back-pressuring the anti-siphon vacuum breaker. Summer's heavy use accelerates the wear.

Symptom Guides · plumbing

Hose Bib Handle Spins But Won't Turn

An outdoor hose bib handle gets cross-threaded when the handle retaining screw or the valve stem threads are stripped, usually from over-tightening or corrosion, so the handle turns without opening the valve.

Symptom Guides · plumbing

Hose Bib Suddenly Backflowing?

Your hose bib is backflowing because its vacuum breaker (anti-siphon device) failed or is missing, letting a pressure drop siphon contaminated water back into your supply. Shut off the bib and replace the backflow device.

Symptom Guides · plumbing

Water Tastes Salty On and Off?

Salty tasting water from a water softener means leftover brine is entering your water supply, usually from a stuck brine valve, clogged injector, or a slow drain line during regeneration.

Symptom Guides · plumbing

Hard Water Returning After Softener?

Your water softener is letting hard water back through most often because it's out of salt, has a salt bridge blocking brine, or the control valve stopped regenerating. Check salt and settings first, then test water right after a manual regen.

Symptom Guides · plumbing

Brine Tank Overflow After Renovation

Your water softener brine tank is overflowing after a renovation because the drain line got kinked, the bypass valve got bumped, or debris from the work clogged the brine float, leaving water flowing in with nowhere to go.

Symptom Guides · plumbing

Water Softener Motor Not Cycling

A water softener motor that won't cycle is usually caused by a stuck valve piston, a stripped drive gear, or a failed timer motor. On older units, cracked plastic gears are the most common reason the motor hums but nothing moves.

Symptom Guides · plumbing

Low Pressure Upstairs, Fine Downstairs?

Upstairs-only low pressure usually means a failing pressure regulator, corroded galvanized supply pipe, or a partly closed valve, because water loses roughly 0.43 PSI per foot of vertical rise and any restriction shows up at the highest fixtures first.

Symptom Guides · plumbing

Rust Water Downstairs Only: Causes

Downstairs-only rust-colored water is usually caused by corroded galvanized steel pipes or a sediment-filled water heater serving the lower level, and persistent brown water points toward a whole-house repipe.

Symptom Guides · electrical

Breaker Trips Only in Winter?

Your breaker trips in winter mostly because space heaters overload the circuit (two 1,500-watt heaters exceed a 15-amp breaker), or because cold and moisture trip GFCI/AFCI outlets. Redistribute heaters and check outdoor outlets first.

Symptom Guides · electrical

Breaker Panel Buzzing in Summer?

Your circuit breaker panel buzzes in summer because a loose or failing connection heats up under heavy air conditioning load, causing tiny electrical arcs. Loud or crackling buzzing is an emergency: shut off the main and call an electrician.

Symptom Guides · electrical

Lights Flicker When the AC Starts

A quick, single dip when the AC starts is usually the normal inrush of the compressor motor. Persistent flickering, flicker on lights throughout the house, or flicker with buzzing or heat points to a loose neutral, a weak breaker, or a failing AC contactor and needs attention.

Symptom Guides · electrical

GFCI Outlet Suddenly Won't Reset

A GFCI outlet suddenly won't reset because it's detecting a ground fault, moisture, or has reached end of life. Unplug all devices on the circuit first, then try resetting; if it won't hold with nothing plugged in, the outlet or wiring likely needs replacement.

Symptom Guides · electrical

GFCI Outlet Tripping Randomly?

A GFCI outlet trips intermittently when it detects small current leaking to ground, often from moisture, a downstream appliance, a shared neutral, or an aging GFCI. It's a safety response, so the cause needs to be found rather than reset repeatedly.

Symptom Guides · electrical

GFCI Cutting Power to Downstream Outlets

Your GFCI cuts power to downstream outlets when it detects current leaking to ground, and a worsening pattern means that leakage is growing, usually from moisture, damaged wiring, a failing appliance, or a GFCI at the end of its life.

Symptom Guides · electrical

GFCI Test Button Stuck After Reno

A GFCI test button gets stuck after renovation because paint overspray or drywall dust fouls the internal mechanism, or the device was damaged during construction. Shut off the breaker and replace the outlet if it won't reset.