Maintenance Schedule
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Sources

Where the numbers come from

Every interval or rule beyond the app’s own defaults has a primary source. Each was read on the date shown; re-check it before relying on it.

MOT due date

First MOT, annual MOTs and the earliest test in Great Britain; Northern Ireland’s four-year rule.

  1. Getting an MOT: when to get an MOT. GOV.UK.First MOT at three years, annual MOTs, and the earliest test that keeps the renewal date. Checked 6 November 2026.
  2. Check the MOT history of a vehicle. GOV.UK.The official checker the page links to instead of replacing. Checked 6 November 2026.
  3. Motor vehicle documentation, learner and newly qualified driver requirements. nidirect (Northern Ireland Executive).Northern Ireland’s first test at four years, run by the DVA. Checked 6 November 2026.

Tyre and tire age

The DOT date code, the UK heavy-vehicle rule and the US age guidance.

  1. Tyre age restrictions for goods vehicles, buses, coaches and minibuses. Department for Transport (GOV.UK).The 10-year rule applies to heavy vehicles, not cars; older tyres are lawful but not recommended on other axles. Checked 6 November 2026.
  2. Updated guidance: tyres over 10 years old. Driver and Vehicle Standards Agency (DVSA).The start date of the 10-year rule for heavy vehicles. Checked 6 November 2026.
  3. Car tyres and your safety. TyreSafe.Monthly inspection, and following the vehicle or tyre maker’s maximum-age guidance. Checked 6 November 2026.
  4. Tire safety ratings and awareness. NHTSA (US Department of Transportation).US guidance of six to 10 years, and how to read the DOT date code. Checked 6 November 2026.

HVAC filters and service

Monthly checks, the depth table and the annual service.

  1. Heat and cool efficiently. ENERGY STAR (US EPA and DOE).Monthly checks and a three-month minimum for the filter. Checked 6 November 2026.
  2. Maintenance checklist. ENERGY STAR (US EPA and DOE).An annual professional HVAC service. Checked 6 November 2026.
  3. Filtrete air filter FAQs. Filtrete (3M).One-inch filters every three months; four-inch and thicker filters annually. Checked 6 November 2026.
  4. How often to change and replace the HVAC air filter. Filterbuy.The depth table for 1, 2, 4 and 5-inch filters, and shorter intervals with pets. Checked 6 November 2026.

Warranty and consumer rights

Statutory rights are separate from a warranty; the time limits differ in Scotland.

  1. Consumer Rights Act 2015: explanatory notes, paragraph 105. legislation.gov.uk.The six-year limit in England, Wales and Northern Ireland, and five years in Scotland. Checked 6 November 2026.
  2. If you’re unhappy about poor service. Citizens Advice.The same time limits in plain language, for services. Checked 6 November 2026.

How often

The intervals on the “how often” pages, from government, standards bodies, manufacturers and professional bodies.

  1. Learn more about smoke alarms. National Fire Protection Association (NFPA).Testing monthly and replacing the whole alarm at 10 years. Checked 6 November 2026.
  2. Gas safety: home owners. Health and Safety Executive (HSE).An annual service by a Gas Safe registered engineer. Checked 6 November 2026.
  3. Gas safety checks: who needs them?. Health and Safety Executive (HSE).A landlord’s annual gas safety check, separate from a service. Checked 6 November 2026.
  4. How to make your home safer and stronger. FEMA.Cleaning gutters at least twice a year. Checked 6 November 2026.
  5. How to drain and flush a water heater. A. O. Smith.Six-monthly flushing in A. O. Smith’s maintenance guidance. Checked 6 November 2026.
  6. Residential electric water heater installation and use guide. A. O. Smith.At least annual flushing for a residential tank, more often with hard water. Checked 6 November 2026.
  7. What are the oil change intervals using synthetic oil?. Toyota.A 12-month or 10,000-mile oil interval for modern synthetic oil, shorter for older engines. Checked 6 November 2026.
  8. How often should I service my car?. The AA.An annual service, which includes a brake check. Checked 6 November 2026.
  9. Routine tire care tips. Michelin.Rotation every 6,000 to 8,000 miles, or the vehicle maker’s schedule. Checked 6 November 2026.
  10. Worms in dogs. PDSA.Worming every one to three months for most adult dogs, more often for higher-risk dogs. Checked 6 November 2026.
  11. How to choose the best flea and worm treatment for your dog. PDSA.Following the product and the vet, not one fixed interval. Checked 6 November 2026.
  12. The Park Tool guide to bicycle lubricants and compounds. Park Tool.Regular cleaning and lubing, and re-lubing after wet rides. Checked 6 November 2026.
  13. Dental check-ups. NHS.A check-up interval set by the dentist, commonly 6 to 24 months. Checked 6 November 2026.
  14. Lawn mowing guide. Royal Horticultural Society.Weekly mowing in summer, and once a fortnight or once a week in spring and autumn. Checked 6 November 2026.
  15. How to trim a hedge. Royal Horticultural Society.Up to three trims a year for formal hedges; lighter, rotational trimming for informal hedges. Checked 6 November 2026.
  16. How to grow hedges. Royal Horticultural Society.An annual trim for most mature hedges. Checked 6 November 2026.
  17. How to mulch with organic matter. Royal Horticultural Society.Mulching garden beds once a year. Checked 6 November 2026.

The app’s ready-made intervals are the app’s defaults, not advice. Pages say when a sourced interval differs from the app’s default.