Trusted Home Repair Diagnosis Guides · Page 8

Symptom Guides · appliance

Oven Won't Heat but Stovetop Works

Your oven and stovetop run on separate circuits inside the range, so a cold oven with a working stovetop points to a failed oven part, most often a burned-out bake element, a blown thermal fuse, or a bad control board.

Cost Guides · appliance

Freezer Cold, Fridge Warm Repair Cost

Fixing a freezer that's cold while the fridge is warm typically costs $20–$100 as a DIY defrost or fan repair, or $150–$550 with a technician if the defrost heater, thermostat, or control board has failed.

Cost Guides · appliance

Dryer Takes Two Cycles: Fix Cost 2026

Fixing a dryer that takes two full cycles to dry typically costs $15–$80 as a DIY vent cleaning, or $140–$450 for a professional repair if a heating element, thermostat, or thermal fuse has failed.

Symptom Guides · roofing

Granules in Gutters From Shingles?

Granules collect in gutters from normal shingle aging, storm impact, or a roof nearing the end of its life. Light loss on a new roof is normal; heavy or ongoing loss with visible bald spots means the shingles are failing.

Symptom Guides · roofing

Roof Leaks Only in Wind-Driven Rain

An asphalt shingle roof that leaks only in wind-driven rain usually has a gap that water can't reach in vertical rain but can when it's pushed sideways or uphill: lifted shingle tabs, failed flashing overlaps, or exposed nails. The wind direction points to the failed area.

Symptom Guides · roofing

Missing or Blown-Off Asphalt Shingles

Asphalt shingles blow off when their self-seal adhesive strip fails, nails are set too high or overdriven, or the shingles are simply old and brittle. Wind exploits the weak bond and peels tabs back.

Symptom Guides · roofing

Chimney Flashing Leaks After Storms

Your chimney leaks after storms because the flashing where the chimney meets the roof has failed. Wind-driven rain gets behind loose counterflashing, cracked sealant, or improperly installed step flashing and runs into the attic.

Symptom Guides · foundation

Stair-Step Cracks in Brick Veneer

Stair-step cracks in basement brick veneer usually signal foundation settlement or soil pressure pushing on the wall. Cracks under 1/8 inch are often cosmetic, but anything wider or growing needs a foundation contractor.

Symptom Guides · foundation

Slab Floor Sloping Toward a Wall

Your concrete slab floor slopes toward an exterior wall because the outer edge of the foundation has settled, typically from soil shrinkage, poor drainage, or a slab plumbing leak. It's a foundation problem that needs a pro to assess.

Symptom Guides · foundation

White Powder on the Basement Wall

White chalky powder on a basement wall is efflorescence, mineral salt deposits left behind when water passes through concrete or block and evaporates. It signals moisture intrusion, not structural damage by itself.

Symptom Guides · appliance

Dryer Runs But Not Heating?

A clothes dryer that tumbles but won't heat usually has a failed heating element, a blown thermal fuse, or a gas ignition fault. On electric models, check for a half-tripped 240V breaker first.

Symptom Guides · appliance

Dryer Vent Hose Crushed or Clogged

Your dryer vent hose is crushed usually because the dryer sits too close to the wall and pinches the hose, or it's clogged with lint that's been building up over months. Both restrict airflow and force longer drying times.

Cost Guides · roofing

Wind-Driven Rain Roof Leak Repair Cost

Fixing an asphalt shingle roof that leaks only in wind-driven rain typically costs $300 to $1,500 in 2026, depending on whether it's a flashing reseal or a larger flashing and vent repair after a water test.

Cost Guides · appliance

Dryer Not Heating: Repair Cost

Fixing a dryer that won't heat costs about $20 to $100 as a DIY repair and $150 to $550 with a professional, depending on the failed part and whether the dryer is gas or electric.

Symptom Guides · water-heater

Hot Water Runs Out Way Faster Now

A tank water heater that runs out of hot water faster than it used to is usually caused by sediment buildup reducing tank capacity, a failed lower heating element on electric models, or a cracked dip tube. Most of these are diagnosable and repairable for $200–$800.

Symptom Guides · water-heater

Water Heater T&P Valve Dripping

Your water heater's T&P valve drips because pressure or temperature inside the tank exceeded its rating (usually 150 psi or 210°F), or because the valve has worn out. It's a safety device working as designed, so never plug it. Find and fix the root cause.

Symptom Guides · water-heater

Hot Water Smells Like Rotten Eggs?

Your hot water smells like rotten eggs because sulfate-reducing bacteria in the tank react with the magnesium anode rod to produce hydrogen sulfide gas. Replacing the anode rod and disinfecting the tank usually fixes it.

Symptom Guides · roofing

Water Behind Gutter, Down the Fascia

Water runs behind a gutter mainly because the roof edge lacks a drip edge to direct runoff into the trough, or because a clogged gutter is overflowing backward. Both let water soak the fascia and soffit.

Symptom Guides · roofing

Downspout Dumping Water By Foundation

Your downspout dumps water next to the foundation because it lacks an extension, the extension is disconnected or damaged, or an underground drain line is clogged. Redirecting the water 4 to 6 feet from the house solves it in most cases.

Symptom Guides · sump-pump

Sump Pump Runs, Water Won't Drop

A sump pump that runs without lowering the water level almost always has a blocked discharge path: a stuck check valve, a clogged or airlocked impeller, or a frozen exterior pipe.

Symptom Guides · sump-pump

Sump Pump Bangs When It Shuts Off

A loud bang when your sump pump shuts off is water hammer, caused by the check valve slamming shut as the water column stops. Replacing the stock check valve with a soft-close model or adding a water hammer arrestor usually fixes it for $40–$200.

Symptom Guides · chimney

Cold Draft Pouring Down the Chimney

A cold draft pours down an unused chimney when warm household air escapes upstairs and pulls cold outside air in through a leaky damper or open flue. Sealing the damper or adding a top-sealing cap usually stops it.

Symptom Guides · chimney

Smoky Smell on Humid Days? Chimney

A smoky smell on humid days comes from creosote buildup in the chimney flue absorbing moisture and off-gassing back into the house, often made worse by negative air pressure pulling flue air down into the room.

Symptom Guides · insulation

Frost on Attic Roof Sheathing

Frost on attic roof sheathing forms when warm, humid air from your living space leaks up into a cold attic and condenses, then freezes, on the wood. Air-seal the ceiling and improve attic ventilation to stop it.

Symptom Guides · insulation

Snow Melting in Patches on Your Roof

Your roof melts snow in patches because heat is escaping unevenly through weak spots in your attic insulation, warming the roof deck above those areas and melting the snow before it can build up evenly.

Symptom Guides · structural

Floor Feels Spongy in One Spot

A spongy spot in one area of your floor is usually caused by water-damaged subfloor or a weakened floor joist below it. It's a structural issue that needs inspection from underneath before the area gets worse.

Symptom Guides · garage-door

Door Opens a Few Inches Then Stops

A garage door that opens a few inches then stops usually has a broken torsion spring. The opener can't lift the door's weight without spring assistance, so it stalls or reverses within seconds.

Symptom Guides · septic

Toilet Gurgles After Laundry (Septic)

Your toilet gurgles after laundry because the septic tank or drain field can't accept water fast enough, so the washer's surge forces trapped air back up through the toilet. It usually means the tank is full or the drain field is failing.

Symptom Guides · landscaping

Sprinkler zone won't shut off

A sprinkler zone that won't shut off is usually caused by a valve stuck open, either from debris trapped under the diaphragm or a failed solenoid. Shut off the main water supply first, then clean or rebuild the zone valve.

Symptom Guides · pool

Pool Pump Losing Prime Overnight

A pool pump loses prime overnight because air leaks in on the suction side (most often a dry pump lid o-ring or loose fitting) and water drains back when the pump shuts off. Lubricate or replace the o-ring and check suction fittings first.

Symptom Guides · pest

Scratching in Ceiling Only at Night

Scratching in the ceiling only at night is almost always nocturnal rodents (rats or mice) active in your attic or ceiling void after the house quiets down. Confirm with droppings and gnaw marks, find the entry point, and seal it before trapping.

Symptom Guides · masonry

Retaining Wall Leaning After Rain

Your retaining wall is leaning outward after heavy rain because water saturated the soil behind it and built up hydrostatic pressure faster than the drainage could release it, pushing the wall forward.

Cost Guides · plumbing

Cost to Replace an Outdoor Hose Bib

Professional repair typically runs $150–$450. This is not a DIY job, so plan on hiring a pro.

Symptom Guides · windows

Gap Between Bay Window and Wall

Your bay window is pulling away from the wall because its support system (roof straps, cables, or knee braces) is failing and the heavy unit is sagging. This is a structural problem that needs inspection, not just fresh caulk.

Cost Guides · water-heater

Dripping T&P Valve Repair Cost

Professional repair typically runs $200–$800. This is not a DIY job, so plan on hiring a pro.

Cost Guides · roofing

Water Behind Gutter: Cost to Fix

It costs about $150–$600 to fix water running behind the gutter and down the fascia, depending on whether you just need gutter apron flashing or you also have to replace rotted fascia and soffit.

Cost Guides · sump-pump

Sump Runs, Water Won't Drop: Cost

Fixing a sump pump that runs but doesn't lower the water level costs $40–$200 in DIY parts (usually a check valve or clearing the discharge line) or $200–$700 for a pro, with full pump replacement running $400 to $900 installed.

Symptom Guides · masonry

Cracked Chimney Crown Letting Water In

Your chimney crown is cracked and letting water in because the thin mortar cap on top has shrunk and frozen over the years, and cracks let rain soak into the brick and flue below. Seal hairline cracks with a crown sealer, but rebuild the crown if it's crumbling.

Symptom Guides · masonry

Chimney Mortar Crumbling Between Bricks

Your chimney mortar is crumbling because the joints have aged and weathered, and repeated freeze-thaw cycles combined with water infiltration break the mortar down faster than the surrounding brick.

Symptom Guides · masonry

Chimney Pulling Away From the House

A brick chimney pulls away from the house when its footing settles or heaves, or when water rots the tie between the chimney and the wall framing. It's a structural emergency that needs a mason or engineer right away.

Symptom Guides · masonry

Water Seeping Through Retaining Wall

Water seeping through a retaining wall face means water is trapped in the soil behind it and pushing through under pressure, usually because the drainage system (gravel backfill and a perforated drain pipe) is clogged, damaged, or missing.

Symptom Guides · masonry

Retaining Wall Top Blocks Shifting

Retaining wall blocks shift at the top mostly from water pressure behind the wall or a cap course that lost its adhesive or pin. The top row moves first because it carries the least weight holding it down.

Symptom Guides · garage-door

Garage Door Closes Then Reopens

Your garage door closes then reopens because the safety photo-eye sensors near the floor are misaligned, dirty, or obstructed. Clean and realign both sensors until their LEDs stay solid, and the door should close normally.

Symptom Guides · garage-door

Remote Works But Wall Button Doesn't

Your remote works but the wall button doesn't because the issue is in the wall button, its low-voltage wires, or a lockout setting, not the opener motor or logic board. Test by touching the two button wires together at the opener terminals.

Symptom Guides · garage-door

Motor Runs But the Door Won't Move

The motor runs but the door doesn't move because the drive connection failed, most commonly a stripped plastic drive gear, a disengaged trolley from the emergency release, or a broken carriage. Confirm by disconnecting the opener and lifting the door by hand.

Symptom Guides · garage-door

Garage door shudders and jerks opening

A garage door that shudders and jerks while opening is binding somewhere in the door hardware. The most common causes are dry or worn rollers, a bent or misaligned track, and torsion springs that have lost tension, which forces the opener to yank the door up in surges instead of lifting it smoothly.

Symptom Guides · garage-door

Garage door slams shut when closing

A garage door that slams shut instead of lowering slowly has lost spring counterbalance, most often from a broken torsion spring or a lift cable off its drum. Stop using the door and call a garage door technician, since the panel can free-fall with hundreds of pounds of force.

Symptom Guides · windows

Hazy film that won't clean off double-pane glass

A hazy film that won't clean off a double-pane window is usually on surface 2 or 3 (inside the sealed unit) from a failed insulated glass seal, or it's mineral etching burned into the exterior face by hard sprinkler water. Both require replacing the glass unit rather than cleaning it.