# FaultToFix

> What's the fault? Start with the symptom.


## Posts

- [Cold Air Coming Under Your Door? Find the Gap Before You Buy Any Draught Strip](https://faulttofix.com/draughty-door-find-the-gap-first/): Quick Answer: Cold air under a door is a gap problem with a specific address — find it before you buy anything.
- [Crack in Your Wall? How to Monitor It — and the Signs That Mean Call a Professional](https://faulttofix.com/crack-in-wall-monitor-or-professional/): Quick Answer: Do not guess at a crack, and do not let anyone guess for you — measure it and watch it.
- [Door Won't Latch, Swings by Itself, or Rattles? The Hinge and Latch Alignment Guide](https://faulttofix.com/door-wont-latch-hinge-latch-alignment/): Quick Answer: A door that won't latch is almost never a broken latch — it is a door that has moved.
- [Door Keeps Sticking? Check the Hinge Screws Before You Trim Anything](https://faulttofix.com/door-keeps-sticking-check-hinges-first/): Quick Answer: A door that keeps sticking usually has not grown — it has dropped.
- [Draughty uPVC Window? Adjust the Locking Cams Before You Pay for New Seals (UK)](https://faulttofix.com/draughty-upvc-window-adjust-cams-hinges/): Quick Answer: A draughty uPVC window usually does not need new seals — it needs its locking cams adjusted.
- [Condensation on Bedroom Windows Every Morning? The Routine That Actually Stops It (UK)](https://faulttofix.com/condensation-bedroom-windows-every-morning/): Quick Answer: Bedroom windows stream every morning because overnight you breathe out litres of warm, moist air, and the window is the coldest surface in the room — so that moisture lands there first.
- [Tap Still Dripping After Changing the Washer? It Might Be a Ceramic-Disc Cartridge (UK)](https://faulttofix.com/tap-still-dripping-ceramic-disc/): Quick Answer: If your tap still drips after you changed the washer, there is a good chance your tap never had a washer to change.
- [Faucet Still Dripping After a New Washer? Check the Valve Seat Next (US)](https://faulttofix.com/faucet-still-dripping-after-washer/): Quick Answer: If your faucet still drips after a new washer, the washer was probably never the whole fault.
- [Water Trickling Into the Toilet Pan? The Dual-Flush Seal Is the Usual Culprit (UK)](https://faulttofix.com/water-trickling-into-toilet-pan/): Quick Answer: A constant trickle of water running down the back of the toilet pan is almost always the drop valve's seal washer — the flat rubber ring at the bottom of the dual-flush valve.
- [Toilet Keeps Running Every Few Minutes? It's a Phantom Flush — Find the Leak in 2 Minutes](https://faulttofix.com/toilet-keeps-running-phantom-flush/): Quick Answer: Your toilet is leaking water from the tank into the bowl, usually past a worn flapper, so the fill valve tops the tank up every few minutes.
- [One Room Always Cold? It's Probably the Balancing — Work Through These 4 Causes in Order](https://faulttofix.com/one-room-always-cold/): Quick Answer: When one room never warms up but the rest of the house is fine, the cause is usually the radiator, not the boiler: a stuck valve pin, poor system balancing starving that radiator, sludge inside it, or a radiator too small for the room.
- [Radiator Gurgling or Bubbling? Air, Sludge or Pump — How to Tell Which](https://faulttofix.com/radiator-gurgling-noises/): Quick Answer: A gurgling or bubbling radiator is almost always trapped air sitting at the top of the radiator, with the heating water forcing its way past it — that's the glugging sound.
- [Boiler Pressure Keeps Dropping but No Leak Anywhere? Work Through This Checklist](https://faulttofix.com/boiler-pressure-keeps-dropping/): Quick Answer: If your boiler pressure keeps dropping and you can't see a leak, the water is still escaping somewhere — a sealed system can't lose pressure any other way.
- [One Radiator Not Working? Check the Stuck TRV Pin First (5-Minute Fix)](https://faulttofix.com/one-radiator-not-working-trv-pin/): Quick Answer: If one radiator stays stone cold while the rest of the house heats up, the most common cause is the TRV pin seized in the down (closed) position after months shut over summer.
- [Radiator Cold at the Bottom but Hot at the Top? It's Sludge — Here's the Fix](https://faulttofix.com/radiator-cold-at-bottom/): Quick Answer: A radiator hot at the top and cold at the bottom is almost never an air problem — air rises, so air makes the top cold.

## Pages

- [Doors & Walls, Diagnosed by Symptom — Sticking Doors, Loose Hinges, and Cracks That Need a Closer Look](https://faulttofix.com/doors-walls/): Short answer: Most door faults are small and seasonal — a hinge screw working loose, a latch missing its strike plate by a millimetre, or a door swelling slightly in damp weather.
- [Damp Windows, Diagnosed by Symptom — Condensation Every Morning and Draughts at the Sash](https://faulttofix.com/damp-windows/): Short answer: Most damp-window problems are not broken windows.
- [Plumbing Faults, Diagnosed by Symptom — Running Toilets and Taps That Won't Stop Dripping](https://faulttofix.com/plumbing/): Short answer: Most household plumbing faults worth fixing yourself come down to a short list of worn rubber and plastic parts — and the symptom tells you which one before you buy anything.
- [Heating Faults, Diagnosed by Symptom — Start With What's Wrong, Not With a Guess](https://faulttofix.com/heating/): Short answer: Most heating faults announce themselves through one radiator, one room, or one pressure gauge — and the pattern tells you the cause before you touch a tool.
- [Home](https://faulttofix.com/): What's the fault? Start with the symptom.
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