# How do I record a maintenance condition I have not checked?

> A fictional home record keeps an unreadable filter label, an unconfirmed service date and a known follow-up separate. Unknown does not mean failed.

[Canonical article](https://makethisuseful.com/articles/maintenance-unknown-condition-example)

By Make This Useful. Published 2026-09-09; updated 2026-09-10.

Prepared with AI assistance. Worked examples are original fiction, not customer records or professional findings.

![An observation, a reported action and a follow-up are different parts of a useful home record. An unknown condition stays unknown.](https://makethisuseful.com/articles/media/maintenance-record.svg)

Original explanatory diagram. An observation, a reported action and a follow-up are different parts of a useful home record. An unknown condition stays unknown.

Record an unchecked maintenance condition as unknown, together with the source or observation that could resolve it. An unknown answer is not a failed condition. A record can be useful before anyone has established a technical conclusion.

This fictional example concerns an existing household file. It gives no instructions to open equipment, choose a replacement part or perform a service.

## The finished record

> **Heating-system record: information to confirm**
>
> Prepared September 9, 2026, from the resident's notes.
>
> **Known:** A filter-purchase receipt is in the blue appliance folder. The receipt is dated June 4. It does not record an installation date.
>
> **Identity:** The current equipment model has not yet been recorded. A previous photograph is too blurred to read reliably.
>
> **Current condition:** Not checked in this record. No finding about filter fit or condition has been supplied.
>
> **Service history:** A visit is remembered from spring, but the date and work remain unconfirmed.
>
> **Next action:** Find a readable model record and the service receipt, then use the applicable instructions or service contact to resolve the missing information.

The receipt date is retained because it is useful evidence. It is not relabeled “last changed June 4.” Buying a part, installing it and checking its condition are separate events. A remembered visit is similarly not proof of a particular service action.

## What the assessment can say

The Home Maintenance Score counts the statuses you choose; it does not infer that a detail is present from your text. Mark a criterion Recorded only after you find its supporting information, and keep an unchecked answer Unknown. Entering a model number alone does not change the score until you change the relevant status. A higher score after that change describes your checklist answers, not improved equipment condition.

If the service receipt later confirms a filter replacement on June 18, update the reported work and its date from that source. Keep present condition unconfirmed unless someone actually supplies an applicable observation. Do not backfill the two different dates into one invented event.

## Find the next source

[ENERGY STAR provides a general maintenance checklist](https://www.energystar.gov/saveathome/heating-cooling/maintenance-checklist) that distinguishes professional checks from household filter attention. Use your actual equipment instructions and qualified service support for the task that applies. A generic score is not a replacement for either.

[Review your own maintenance record](https://makethisuseful.com/start/home-maintenance-score), choose the checklist answers yourself and leave unobserved conditions unknown. The tool keeps your supplied wording in a maintenance note; edit the next step into something concrete you can complete from a real source.

## Use this with your own information

[Review my maintenance record](https://makethisuseful.com/start/home-maintenance-score)

The tool works without an account. The example's people and values are not transferred to your work.

[Download the blank maintenance record (text)](https://makethisuseful.com/articles/downloads/maintenance-record.txt)

## Sources and this edition

Original fictional examples reviewed for supplied facts, arithmetic, unknowns, source attribution and a usable blank-tool destination. This is an editorial check, not an inspection, clinical review or professional endorsement.

- [ENERGY STAR: Maintenance Checklist](https://www.energystar.gov/saveathome/heating-cooling/maintenance-checklist): Distinguishes professional system maintenance from household filter attention. Equipment-specific instructions and actual service evidence remain necessary. Checked 2026-09-09.

September 10: clarified the guided self-assessment interaction and task-specific takeaway. All people, prices, items and household situations in the worked examples are fictional. Their facts are not transferred when you start your own tool.