Home, Repairs & Tech Help: 62 real cases

Match a 1999 wood floor stain from a sunlit photo and order a quart with ChatGPT

A Hacker News commenter needed a stain to match the wood flooring in a house built in 1999. They uploaded a clear photo taken in bright sunlight, ChatGPT searched online for a matching stain colour and presented ordering options, and a quart was delivered the day before they posted.

Find a water heater's failing check valve after other checks with Grok

After flushing the water heater, cleaning filters and checking error codes and sensors, the poster wasn't sure what to check next and asked Grok, which said that model has a check valve that often fails. Pulling it out solved the problem; the poster says it was an $8 part and saved $800 in repairs.

Clear a clogged sink with Gemini Live guiding each step

Instead of calling a plumber, the poster used Gemini Live, which guided them through the job, said what to buy and what might be causing the clog; they cross-checked the advice with Claude Opus. In about 15 minutes the sink was fixed, and the poster says they now understand how it works.

Fix a 2002 furnace from a scanned paper manual with ChatGPT

The previous owners had left the 25-page paper manual for the poster's 2002 heating system. The poster scanned it with a phone app, uploaded the PDF to ChatGPT, worked through a diagnosis with it and says they fixed the furnace themselves.

Find a fridge's uneven cooling came from dusty condenser coils with NotebookLM

Anu Joy built a NotebookLM notebook for their refrigerator from the manual, the invoice, repair guides, YouTube videos and Reddit threads, then asked why the fridge section wasn't holding temperature evenly. It listed common causes such as blocked vents, shelf obstructions and worn door gaskets. After ruling those out, Joy found the condenser coils coated in dust, cleaned them, and watched a thermometer show the cooling stabilising within about half an hour.

Get a toilet filling and flushing properly again with ChatGPT

With ChatGPT's help, the poster raised the water level using the fill valve and found that the hose had come off the overflow tube, then reconnected it. The poster says ChatGPT helped them fix the toilet.

Stop water hammer by setting pressure-reducing valves correctly with Grok's help

A licensed plumber says Grok helped them set their Watts LF150A valves properly, finally ending the severe water hammer in their house whenever the washing machine's solenoid shut off.

Rescue drooping houseplants and build a watering schedule with a Gemini Notebook

Android Police's Khumail Thakur uploaded daytime photos of houseplants to a Gemini Notebook, had Gemini identify each species and run deep research saved as sources, and added local climate details. When a Caladium drooped and the soil was soggy, it said to drain the excess water and add drainage holes; for a Monstera adansonii with black margins and yellow halos it pointed to low humidity from the air conditioner. It also wrote weekly and monthly care task lists, which had to be copied into a reminders app by hand.

Fix a leak under the kitchen sink with ChatGPT's help finding the right part

After noticing a leak under their kitchen sink, a poster used ChatGPT to work out what needed fixing, bought the replacement part and fixed it themselves. No more leak.

Make a DIY patio project checklist in Google Keep with Gemini

An Android Police writer describes using Gemini in Google Keep for planning: asking it for a checklist for a DIY paver patio project, including prep materials and safety gear, gave them a 15-point list within three seconds that they say would have taken 20 minutes of searching. They edit the lists rather than using them as-is.

Visualize a furniture layout for an empty corner from a photo with ChatGPT

After three days lost in Pinterest boards, Tom's Guide's Kaycee Hill uploaded an unedited photo of an empty living-room corner to ChatGPT and described the chair, side table, bookcase and lamp they wanted. They then resized, removed and recoloured pieces in the generated images to test risky choices, and say they finished with a visual blueprint of what sizes to measure for and colours to buy, saving hundreds in potential returns.

Get a dead AC condenser running again from photos with Grok

With their upstairs bedroom hitting 90°F, a poster asked Grok how to cool the house and found the outdoor condenser wasn't running. They say Grok walked them step by step through fuses, capacitors, contactors, multimeter use and Nest and furnace control-board wiring from their photos; after hours of near-misses they booked an HVAC visit, but Grok then spotted miswired Nest thermostat and control-board wires. After they fixed the wiring the AC ran, and they cancelled the appointment, estimating they saved $1,000+.

Work out how to remove and repair a 1980s dishwasher from its model number with ChatGPT

A hired contractor couldn't work out how to remove the poster's grandparents' 1980s dishwasher, which was attached at the top. Hacker News user MattGaiser gave ChatGPT the model number; it explained why it wouldn't come out (a part had to be disconnected), found a replacement part and gave step-by-step instructions for taking that part out. They didn't end up buying the new part.

Clear a dishwasher error by cleaning the filter and resetting it with Grok

A poster says Google's AI told them a dishwasher error likely meant the machine needed repair or replacement, but Grok told them to check the filter, which was clogged, and gave exact instructions to reset it. It worked perfectly.

Build a tiny house with no experience using ChatGPT for quantities, purchase order and cost-splitting, while catching frequent errors

With no building experience, Simone Solazzo and Anne Leijdekkers built a tiny home in the Netherlands over five months in 2025, asking ChatGPT questions constantly. It helped them think through deviations from the plan, do sums and measurements, work out quantities and buying order for around 250 items, and split costs between them. But they often doubted its guidance, and an architect friend showed its answers were frequently wrong; sometimes it stated false things when it didn't know. They relied on the friend and family for ventilation, insulation, electricity and water.

Find a failed AC contactor and fix it for $15 with Claude's step-by-step troubleshooting

When their thermostat rebooted every time the AC tried to start, a homeowner worked through it with Claude: checking thermostat wiring, then the air handler board and fuse, then isolating the cooling circuit, which pointed to the outdoor unit. There they found a contactor with degraded coil wiring, ordered a $15 replacement and swapped it in 20 minutes. They say the AC runs perfectly, versus a $150 minimum service call they expected to reach $300–400.

Fix a washing machine that won't fill using Gemini, after ChatGPT picked the wrong part

A poster described their broken washing machine to Gemini, which helped them run diagnostics, found it wasn't taking in water and pointed to the inlet valve. They used ChatGPT's shopping help to find and order the part, but the first part didn't fit even though ChatGPT said it would. They installed the right one with Gemini's guidance in about 1.5 hours total, saving about $120 on labour.

Narrow down why a gas dryer takes three hours with a ChatGPT video chat before calling a repair company

When a dryer took three hours to dry a load (normally 45 minutes), Lisa-Anne Chung showed ChatGPT the model number, the parts that weren't working and the pipes at the back over a video chat. It identified the model from a photo, walked Chung through checks such as whether the burner glowed and listening for clicks, gave a shortlist of likely causes, and suggested Sunnyvale repair companies via Yelp with a fair diagnostic fee. Chung says they had a solid hypothesis in about 10 minutes and could talk knowledgeably when they called a repair company.

Diagnose a broken garage door opener and replace the carriage for $22.48 with Gemini

A homeowner described their garage door opener's behaviour to Gemini, which identified a failed carriage, pointed them to where to buy a new one and found a DIY installation video. They say they spent ten minutes with Gemini and $22.48, versus a service call and repair they estimate would have cost several hundred dollars.

Fix a dead freezer with a £10 wire after Grok's voice-and-camera mode found a known fault

When a freezer stopped working, Marc Landers gave Grok the make, model and problem. Grok had them turn on voice and camera mode, open the door, remove the top hinge cover (no tools needed) and point the camera at a wire it said was a known fault for that model. Grok gave the price and an Amazon link for the part; the £10 wire arrived next day and took five minutes to replace, instead of paying a repair technician.

Find out a leaking shower cartridge is under lifetime warranty with Grok

A Delta shower installed in 2009 was leaking badly from its cartridge. The poster (@JustAnAvgJoeW) asked Grok, which said the faucet had a lifetime warranty; they ordered the replacement part the same day and planned to fit it themselves after a video, which they estimated would save $400–$500 over a plumber.

Winterize old plumbing from photos with Gemini, and know when to call a plumber

At their late mother's 100+ year old house, a poster uploaded photos of three plumbing issues to Gemini Pro. For two (valves for outside hose bibs and a shower) it identified the plumbing type and explained how to winterize, which they did without a hitch; for a leaky hot-water boiler it diagnosed the problem and told them to call a plumber, which they did.

Diagnose a washing machine fault and get exact part numbers from Grok instead of calling a repairer

Instead of calling a repairer or buying a new washing machine, the poster (@notswlfty1) asked Grok for help. Grok gave step-by-step diagnosis instructions and the exact part numbers needed, and the poster fixed the machine, estimating the saving at about $2,000.

Fix a tankless water heater a company called 'shot' with Grok and ChatGPT

After a repair company said their tankless water heater was shot and quoted $6,900 to install a new one, a homeowner watched YouTube videos and chatted with Grok 4 and OpenAI's o3 model. The homeowner says they fixed it themselves the next morning in less than 30 minutes and then called the company to get their $100 back.