When Your Watch Needs Service

Watches don't come with a dashboard warning light. The signals that a service is due — or that something has gone wrong — tend to be subtle and easy to attribute to other causes. This article covers what to look for, what it usually means, and how to tell the difference between something routine and something that needs attention right away.

Routine Service Intervals

The starting point for any service discussion is the basic maintenance schedule. Mechanical watches — both manual-wind and automatic — typically benefit from a full service every five to eight years under normal conditions. This is not a fixed rule, and some movements can go longer without problems, but five to eight years is a reasonable planning window.

The reason for this interval isn't wear in the conventional sense — it's lubrication degradation. Watch oils and greases break down over time regardless of how much the watch is used. A watch sitting in a drawer still has lubricants that are aging. When those lubricants thicken or dry out, friction in the movement increases, components begin to wear more quickly, and timekeeping becomes less consistent. The service interval is designed to renew the lubrication before the consequences become significant.

Quartz watches require less frequent servicing, but do need batteries replaced every one to two years and a full service every ten to fifteen years or so — again depending on use and condition.

Signs in Timekeeping

A change in how accurately your watch keeps time is the most informative signal available without opening the case. The key word is change — a watch that has always run a few seconds fast per day is behaving normally for its regulation. A watch that suddenly starts gaining or losing significant time when it wasn't before is telling you something different.

Running Significantly Fast

A mechanical watch that suddenly starts gaining 10, 20, or more minutes per day has most likely been magnetized. The hairspring — a very fine coiled spring that controls the oscillation of the balance wheel — can become magnetized when exposed to a strong enough magnetic field. When it does, its coils can attract each other, effectively shortening its working length and causing the balance to oscillate faster. The watch runs fast, sometimes dramatically so.

Magnetization is one of the easiest problems to fix. Demagnetization takes a few minutes and doesn't require opening the case. If you've noticed sudden fast timekeeping, this is the most likely explanation — and it's worth addressing before assuming something more involved is wrong.

Running Slow or Stopping

A watch that runs progressively slower, or that stops even though it appears to be wound, is typically experiencing a lubrication issue. As watch oils thicken or congeal, they create resistance in the gear train and escapement. The movement has to work harder to maintain oscillation, draws more power from the mainspring, and eventually can't sustain the balance wheel's oscillation at all.

Another possibility is a weakened or broken mainspring. Mainsprings do fail occasionally, particularly in older watches or those that have been stored for long periods without use. A broken mainspring is easily identified when the movement is opened — replacing it is a routine part of a full service.

Erratic Timekeeping

A watch that keeps inconsistent time — good some days, noticeably off on others — is harder to pin down without inspection, but often points to partial lubrication failure or an escapement component that's wearing unevenly. Inconsistent timekeeping across different orientations (accurate lying flat but not when worn upright) can indicate a balance wheel issue or a movement that needs regulation across positions.

Signs in the Watch's Physical Condition

Condensation or Fogging Inside the Crystal

This is one of the clearest signs that something needs attention promptly. Moisture inside the case means the water resistance seals have failed, and water has entered the movement. Even small amounts of moisture cause corrosion quickly — pivots, the mainspring, and delicate components in the balance and escapement can all be affected within days.

If you see fogging inside the crystal, bring the watch in as soon as possible rather than waiting to see if it clears. In many cases, prompt action limits the corrosion and keeps repair scope manageable. Waiting significantly increases the risk of more extensive damage.

Crown Problems

A crown that feels loose, wobbly, or that doesn't engage properly with the time-setting mechanism is a mechanical issue that should be addressed. The crown connects to the movement stem, and a stem that's worn or partially broken can fail further without warning. A crown that won't pull out to the setting position, or one that keeps slipping out of position when you try to set the time, is showing the same symptoms from a different angle.

Screw-down crowns that no longer tighten properly are a water resistance concern in addition to a mechanical one — a crown that can't seal correctly means the watch should not be exposed to water until it's been looked at.

Rattling from Inside the Case

A rattle that wasn't there before suggests something inside has come loose. In mechanical movements, loose components can include the rotor in an automatic watch (which has its own bearings and can develop play), a broken or displaced stem, or in more unusual cases, a component that has detached within the movement. Rattles aren't always alarming — sometimes it's something minor — but they should be investigated rather than ignored.

Crystal Damage

Cracked or deeply scratched crystals should be replaced. A cracked crystal no longer seals properly, which affects water resistance. A badly scratched crystal reduces legibility and, over time, can allow debris to enter around the edge of the seal. Crystal replacement is usually straightforward — sapphire, mineral, and acrylic crystals each have their own characteristics and pricing, and we can advise on the appropriate replacement for your watch.

How to Prioritize — Urgent vs. Routine

Some situations call for prompt attention; others can reasonably wait for a convenient time.

Bring it in promptly: Any sign of moisture inside the case. A crown that feels broken or detached. A rattle suggesting something has come loose. Any watch that has experienced a significant impact. These are situations where delay can make things worse.

Schedule at your convenience: Routine service intervals that haven't generated symptoms yet. Gradual accuracy changes over time. A battery that's getting old (bring it in before the battery fully dies rather than waiting until it does). These aren't emergencies, but they shouldn't be postponed indefinitely.

A Note on "It's Working Fine"

One of the most common reasons people delay watch service is that the watch seems to be working fine. It keeps reasonable time, it looks fine, there's nothing obviously wrong. This makes sense — if there's no visible problem, the urgency feels low.

The difficulty is that lubrication failure tends to develop gradually and silently. A movement running on degraded oils for a year or two may not show obvious symptoms until the wear has progressed. By the time symptoms appear, the damage has already been done to some extent. Service intervals are designed to catch the movement before that stage — not in response to symptoms, but ahead of them.

If a watch is past its service interval and showing no symptoms, that's good news. It means the service can likely be straightforward. It's still worth scheduling, because the longer degraded lubricants remain in the movement, the more work there is to address the accumulated wear when it does finally come in.

Getting a Service Assessment

The first step in any service is an assessment — a visual inspection and basic timing evaluation that gives us a picture of what the movement needs. This happens before any work is agreed to or done. If the assessment reveals something unexpected, we communicate it before proceeding.

If you're not sure whether your watch needs service, bringing it in for an assessment is entirely reasonable. You'll leave with a clear picture of where things stand and what, if anything, is needed.