Water meter running with everything off: how to investigate a leak without opening walls
Learn how to check unexplained meter use, test pipes before and after a storage tank, recognize warning signs, and know when to call a plumber.
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A Home That Works
A Home That Works helps residents understand household problems through guidance-oriented diagnostics, checklists, and clear boundaries between a safe check and the need to call a professional.
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Outlet sparks when you plug something in: when it can be normal and when to call an electrician
A tiny flash at the instant of connection can occur. Persistent sparking, heat, burning smell, noise, shock, or repeated breaker trips mean you should stop using it and seek evalua...
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Washing machine fills with water but won’t agitate or spin: how to check the cycle, load and drainage
A safe sequence to separate a normal pause, an unbalanced load and a drainage problem before deciding whether service is needed.
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Air Conditioner Leaking Water Indoors: How to Tell a Clogged Drain from Ice or Installation Problems
A safe way to identify the most likely cause of an indoor leak from its pattern, without opening the unit, and to know when to call a technician.
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Home Diagnosis5 articles
Helps interpret noises, odors, stains, flaws and other signals before making a decision.
Electrical Systems11 articlesSafety, faults, sockets, circuit breakers, lighting and criteria for calling an electrician.
Water & Plumbing7 articlesLeaks, pressure, faucets, toilet flush systems, drains and signs of plumbing problems.
Gas and Kitchen1 articlePreventative guidance on LPG, piped gas, equipment and situations that require immediate interruption.
Damp & Structure3 articlesInfiltrations, mold, cracks, floors, walls, roofs and signs that require technical assessment.
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Freezer cold but refrigerator warm: how to tell blocked airflow, defrost issues, and fan trouble apart
If the freezer freezes normally but the refrigerator is warm, airflow is often the key. Learn how to distinguish blocked vents, defrost-related ice, and a fan problem without takin...
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Refrigerator Pops or Cracks at Night: What’s Normal and When to Call for Service
Popping can be normal during expansion, contraction, and defrosting. Learn how to connect the sound with timing, cooling performance, and electrical warning signs.
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Low shower pressure: when a pressurized model helps and what to check first
Learn how to separate genuinely low pressure from a shower restriction or a plumbing limitation before replacing the unit.
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LED bulb flickers or stays on when switched off: causes and when to call an electrician
Learn why LEDs can glow or flash with the switch off, how to observe the cause without touching wiring, and which warning signs require an electrician.
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RCD, SPD and circuit breaker: what each one protects against — and what it does not
RCDs, SPDs and circuit breakers address different electrical risks. Learn how shock, surges and overcurrent differ, the warning signs, and when to call an electrician.
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Pipe bangs when the faucet closes? How to recognize water hammer and when to call a plumber
Learn the typical water-hammer pattern, how to distinguish other plumbing noises, and when repeated banging, strong vibration, or a leak warrants professional assessment.
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Bulging or hollow-sounding ceramic tile floor: what it means and who to call
Learn how to distinguish a hollow sound from tile tenting, judge whether the problem is local or widespread, when to isolate the area and which professional to call.
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Floor drain gurgles when you flush: how to tell venting, a partial blockage, and a sewer problem apart
A drain that gurgles after a toilet flush signals a pressure disturbance, but the cause may be venting, a partial blockage, or a problem beyond the property. Use safe observations ...
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RCD keeps tripping: how to identify the pattern safely before calling an electrician
Learn which RCD tripping patterns can help locate the cause without opening the panel, altering neutral/earth connections, or testing live circuits.
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- 01Smart meter: what can change and how to participate in the ANEEL consultationElectrical Systems
- 02Lights flashing or going dim when a device turns on: how to separate local fault, internal installation and distributor problemElectrical Systems
- 03Water bill went up without explanation: how to use the water meter to separate leaks, actual consumption and reading problemsWater & Plumbing
- 04Water bill went up without changing your habits? How to test a hidden water meter leak and record the problemWater & Plumbing
- 05Hose and cylinder regulator: what to check before turning on the stoveGas and Kitchen
Home Diagnosis
Helps interpret noises, odors, stains, flaws and other signals before making a decision.
Mold and heavy cleaning product: how to check if a sanitizer is regulated before using
Before using anti-mold or heavy cleaning products, check the label and the status of the sanitizer in the official Anvisa system. See how to make the query.
Read articleWashing machine fills with water but won’t agitate or spin: how to check the cycle, load and drainage
A safe sequence to separate a normal pause, an unbalanced load and a drainage problem before deciding whether service is needed.
Read articleAir Conditioner Leaking Water Indoors: How to Tell a Clogged Drain from Ice or Installation Problems
A safe way to identify the most likely cause of an indoor leak from its pattern, without opening the unit, and to know when to call a technician.
Read articleFreezer cold but refrigerator warm: how to tell blocked airflow, defrost issues, and fan trouble apart
If the freezer freezes normally but the refrigerator is warm, airflow is often the key. Learn how to distinguish blocked vents, defrost-related ice, and a fan problem without takin...
Read articleElectrical Systems
Safety, faults, sockets, circuit breakers, lighting and criteria for calling an electrician.
Outlet getting hot or smelling burnt: when to stop using it and call an electrician
A hot outlet, burning smell, discoloration or deformed plastic call for caution. See what to inspect without taking anything apart and when to stop using it.
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Electric shower trips the circuit breaker: 6 safe visual checks before calling an electrician
If the shower trips the circuit breaker, don't insist. See six contactless observations, identify critical signs and prepare a sheet for the electrician.
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El Niño and energy at home: what to review before heat, rain and consumption spikes
A safe checklist separates what the resident can prepare, what they should just check and which inspections require an electrician before heat and storms.
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ANEEL research is scheduled to take place until August 16, 2026: how to confirm the team before opening the door
IASC 2026 has a national field scheduled until August 16th. See how to check the municipality, badge, uniform, vehicle and approach before responding.
Read articleWater & Plumbing
Leaks, pressure, faucets, toilet flush systems, drains and signs of plumbing problems.
Sewer smell in the bathroom: how to find out if it's coming from the drain, siphon, toilet or ventilation before calling a plumber
A practical guide to locating the source of the odor, distinguishing water shutoff failure, dirt, sealing and ventilation and knowing when to call a professional.
Read articleWater meter running with everything off: how to investigate a leak without opening walls
Learn how to check unexplained meter use, test pipes before and after a storage tank, recognize warning signs, and know when to call a plumber.
Read articleLow shower pressure: when a pressurized model helps and what to check first
Learn how to separate genuinely low pressure from a shower restriction or a plumbing limitation before replacing the unit.
Read articlePipe bangs when the faucet closes? How to recognize water hammer and when to call a plumber
Learn the typical water-hammer pattern, how to distinguish other plumbing noises, and when repeated banging, strong vibration, or a leak warrants professional assessment.
Read articleGas and Kitchen
Preventative guidance on LPG, piped gas, equipment and situations that require immediate interruption.
Hose and cylinder regulator: what to check before turning on the stove
See how to check the validity, seal, visible conditions, clamps and position of the hose and regulator before using the stove with LPG.
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A functional home starts with safe decisions
A Home That Works was created for residents who encounter a problem at home and do not know where to start. Our content organizes symptoms, low-risk checks, warning signs, and criteria for seeking professional help. We distinguish facts, hypotheses, and recommendations, use appropriate sources, and explain the limits of each piece of guidance. Content related to electricity, gas, structural issues, and other risky situations receives technical review before publication.