If you own a grandfather clock, you already know the warmth those chimes bring to your home during the day. But when the clock lives near a bedroom, those same chimes can turn 2 AM into a nightly ordeal. I have worked with clock owners for years, and the question I hear more than any other is always the same: how do you silence a grandfather clock at night without stopping the clock entirely?
The good news is that most chiming grandfather clocks built after the 1960s include some form of silencing feature. Many modern movements even come with Automatic Night Shut-Off (ANSO), which silences the chimes on a set schedule with zero daily effort on your part.
In this guide, our team breaks down every method for nighttime silencing in 2026. You will learn how ANSO works, where to find the selector lever on your specific clock, what to do if your clock has no shut-off feature, and how to fix a broken ANSO mechanism. Whether you inherited an antique or bought a new Howard Miller last 2026, this guide has you covered.
Table of Contents
What Is Automatic Night Shut-Off (ANSO)?
Automatic Night Shut-Off, or ANSO, is a built-in feature on many chiming mechanical clocks that silences the chime automatically during preset nighttime hours. The standard schedule runs from roughly 10:00 PM to 7:00 AM, though some movements use slightly different windows. During this period, the clock goes completely silent without you touching a thing.
When ANSO is active, the clock continues keeping perfect time and the pendulum keeps swinging. The only thing that stops is the chime melody and the hour strike. You wake up to a clock showing the correct time without losing a single minute of sleep.
Not every grandfather clock has ANSO, though. The feature became common on German-made movements, particularly Hermle and Kieninger, starting in the 1980s. Howard Miller, Ridgeway, and Sligh clocks from this era frequently include it. Older clocks and many budget models do not have any automatic silencing at all.
You can usually tell if your clock has ANSO by looking for a three-position selector lever. The three positions are typically labeled something like “Strike,” “Silent,” and “Auto” (sometimes “Night Shut-Off”). If you only see two positions (Strike and Silent), your clock has manual silencing but no automatic scheduling.
How the ANSO Mechanism Works Internally
Inside the movement, ANSO relies on a small cam or program wheel attached to the hour wheel. This cam rotates once every 24 hours. During the programmed daytime hours, the cam allows the chime train to engage normally.
When the cam rotates to its nighttime position, it physically lifts or blocks a lever that connects the chime train to the hammer arms. The gathering pallet and rack still move through their cycles, but the hammers never reach the chime rods or gong.
The clock keeps running because the time train is completely separate from the chime train. This separation is what makes ANSO safe and reliable for nightly use. The mechanism does not wear the clock down faster because the chime train simply skips its hammer strikes.
How to Silence a Grandfather Clock at Night Using ANSO
The exact steps depend on your clock’s movement manufacturer, but the general process is the same across most brands. Here is the full walkthrough for activating and using ANSO to silence your clock overnight.
Where to Find the Selector Lever on Different Clock Types
Finding the selector lever is the single biggest challenge clock owners face. Our team has seen this question dominate Reddit threads and NAWCC forum posts for years. Here is where to look based on your clock type:
Howard Miller and most modern floor clocks: Check the dial face near the 3 o’clock position. Many Howard Miller clocks have a small lever right on the dial, often labeled “Silent,” “Auto,” and “Strike.”
Hermle movements: The lever is frequently on the front of the dial near the 3 o’clock or 9 o’clock position. Some Hermle movements place it just above the 12 o’clock marker.
Ridgeway clocks: Look for a lever near the 3 o’clock position on the dial face. Older Ridgeway models may hide the lever on the side of the movement, accessible through a side access panel.
Antique clocks and pre-1960s models: If your clock has a lever at all, it is typically on the back of the movement or on the dial face with minimal labeling. Some antique clocks only have a basic chime/silent switch with no automatic feature.
Clocks with no visible lever: Open the side or front access panel and inspect the movement itself. Look for a small metal lever, usually brass or steel, positioned near the chime train.
Step-by-Step: Activating and Deactivating ANSO
Once you locate the selector lever, follow these steps to enable nighttime silencing:
Step 1: Open the clock’s front door or side access panel to expose the dial face and movement.
Step 2: Locate the selector lever. It will have two or three positions.
Step 3: If your lever has three positions, move it to the “Auto” or “Night Shut-Off” setting. This activates automatic silencing between 10:00 PM and 7:00 AM.
Step 4: If your lever has only two positions, move it to “Silent.” This silences the chime at all times until you switch it back to “Strike.”
Step 5: Wait for the next chime cycle (either the quarter-hour or the full hour) to confirm the silencing is working.
Step 6: To deactivate ANSO, move the lever back to “Strike” or “Chime.” The clock will resume chiming at the next scheduled chime time.
Warning: Never force the lever if it feels stuck. Forcing it can bend the connecting wire or damage the program cam. If the lever resists, the chime train may be mid-cycle. Wait 15 minutes and try again when the clock is between chime cycles.
Tip: Some ANSO levers are stiff when first used after years of sitting idle. A single drop of clock oil on the lever pivot can free it up without any disassembly.
Manual Silencing Methods for Clocks Without ANSO
Many inherited and antique grandfather clocks have no ANSO feature at all. Some only have a basic chime/silent switch. Others have no silencing mechanism whatsoever. If you fall into any of these categories, you still have several reliable options for quieting your clock at night.
Stopping the Chime While Keeping the Clock Running
The most common manual method involves lifting or dampening the chime hammers. Here are four approaches our team has tested and recommended to clock owners:
Method 1 — Felt padding: Slide a small piece of thin cardboard or adhesive-free felt between the hammers and the chime rods. This dampens the strike so significantly that the chime becomes nearly inaudible while still allowing the hammers to move freely.
Method 2 — Foam wedge: Gently lift the hammer assembly and secure it with a soft foam wedge. This stops the hammers from reaching the rods entirely. Remove the wedge when you want the chime back.
Method 3 — Manual silent switch: If your clock has a manual silent switch on the dial, use it. This disengages the chime train mechanically without any DIY work.
Method 4 — Stop the pendulum: For Tempus Fugit and other budget clocks with no switch, you may need to stop the pendulum entirely. This stops both the chime and the timekeeping, so you will need to reset the time each morning.
Warning: Never use adhesive tape or glue on or near the movement. Residue can gum up the gears and cause expensive damage that requires a full movement overhaul.
Understanding Your Clock’s Chime Mechanism
To troubleshoot silencing issues effectively, it helps to understand what happens inside the clock when it chimes. Most grandfather clocks use one of two chime melodies: Westminster or Whittington. The clock plays the melody in four segments at each quarter hour.
At the top of the hour, the clock plays the full melody followed by an hour count strike. So at 3:00, you hear the full Westminster chime followed by three strikes.
The chime train is powered by one of the three weights hanging in the clock case. The time train, which keeps the clock running, is powered by a separate weight. This is why stopping the chime does not stop the clock.
The chime train releases a hammer assembly that strikes tuned rods or a coil gong. When ANSO or the silent switch is engaged, the connection between the chime train and the hammers is interrupted. The train still runs through its cycle, but the hammers never fall.
This separation matters because it explains why silencing your clock is safe. The chime train skipping its hammer strikes does not add stress to the movement. The hammers simply rest in the lifted position for a few extra hours each night.
How to Fix ANSO When It Stops Working
ANSO mechanisms are generally reliable, but they can fail over time. The most common complaint I hear is that the chimes suddenly resume at night even though the lever is set to “Auto.” Here is what to check, step by step.
Check 1 — Lever seating: Verify the lever is fully seated in the “Auto” position. A lever that sits halfway between settings may not engage the cam properly. Nudge it firmly into position and test at the next chime cycle.
Check 2 — Connecting wire: Look for a bent or disconnected wire between the lever and the chime train. On older movements, these thin wires can fatigue and bend over decades of use. If the wire is bent, the cam can no longer lift the hammer block.
Check 3 — Program wheel cam: Inspect the program wheel cam for wear. If the cam has a worn or flat spot, it may fail to trigger the silencing at the correct time. A worn cam usually requires professional replacement.
Check 4 — Recent transport: Determine whether the clock was recently moved or transported. Moving a grandfather clock can shift internal components, including the ANSO linkage. If the clock was moved, the mechanism may need realignment by a professional.
Check 5 — Movement servicing: Consider the movement’s age and service history. Mechanical movements need cleaning and oiling every 3 to 5 years. A movement that has not been serviced in a decade may have dried oil that prevents the ANSO cam from rotating freely.
Troubleshooting Checklist for Common ANSO Problems
Use this checklist to diagnose your ANSO issue quickly:
Chimes at night despite “Auto” setting: Check lever seating first, then inspect the connecting wire for bends or disconnection.
Lever will not stay in position: The detent spring inside the lever may be worn or broken. A clock repair technician can replace this small part without overhauling the entire movement.
Chimes stopped entirely (day and night): The chime weight may have a broken hook, the chime train may be jammed, or the movement needs a thorough cleaning.
Chimes out of sync after using ANSO: Rotate the minute hand clockwise to the next quarter-hour mark and let the clock self-correct. Never force the hand backward through a chime cycle.
Silent mode works but “Auto” does not: The program wheel cam is likely worn or misaligned. This requires professional servicing to replace or reposition the cam.
Is It Safe to Silence My Grandfather Clock Every Night?
This is the single most common question on Reddit’s r/clocks and the NAWCC forums. The short answer is yes. Silencing your clock every night is completely safe for the movement.
When you engage the silent switch or ANSO, the chime train still runs through its full cycle. The hammers simply do not strike the rods. This does not place additional wear on the movement.
In fact, the hammers resting in the lifted position means slightly less impact stress on the chime rods over time. The time train is entirely separate from the chime train, so silencing the chime has zero effect on timekeeping accuracy.
The only scenario where nightly silencing becomes a problem is if the silencing mechanism itself is damaged and putting stress on the movement. If you hear grinding or feel unusual resistance when engaging the lever, have a professional inspect it before continuing to use the feature.
FAQs
How do you silence a grandfather clock at night?
To silence a grandfather clock at night, locate the selector lever on the dial face near the 3 o’clock position and move it to Silent or Auto. If your clock has ANSO (Automatic Night Shut-Off), the Auto position silences the chime automatically from 10 PM to 7 AM while keeping time running normally. If your clock has no lever, you can place felt between the hammers and chime rods or use a foam wedge to lift the hammers away.
Can all grandfather clocks be silenced?
No, not all grandfather clocks can be silenced with a built-in switch. Clocks built after the 1980s with German Hermle or Kieninger movements usually include ANSO or a manual silent lever. Antique clocks and budget models may have no silencing feature at all, requiring manual methods like felt padding or foam wedges to quiet the chime.
Is it bad to silence my grandfather clock every night?
No, silencing your grandfather clock every night is completely safe. The chime train still runs through its cycle but the hammers do not strike the rods. This causes no additional wear. The time train operates independently, so timekeeping accuracy is unaffected by nightly silencing.
How do I make my clock silent without stopping the time?
Move the selector lever to Silent or Auto to disengage the chime train from the hammers. The clock will keep perfect time because the time train and chime train are powered by separate weights. If your clock has no switch, insert felt between the hammers and chime rods or wedge the hammer assembly up with soft foam.
Why is my grandfather clock not chiming properly after using ANSO?
If your clock chimes out of sync after using ANSO, rotate the minute hand clockwise to the next quarter-hour mark and let the clock self-correct. Never force the hand backward. If the chimes sound sluggish, the movement may need cleaning and oiling. A worn program cam can also cause improper chiming and requires professional replacement.
Conclusion
Knowing how to silence a grandfather clock at night comes down to understanding which feature your movement has and where the selector lever sits. Whether you use ANSO, a manual silent switch, or a simple foam wedge, every method in this guide keeps your clock running while giving you back your sleep.
If your ANSO mechanism has stopped working, start with the troubleshooting checklist above before calling a repair technician. Most issues come down to a misaligned lever or a bent connecting wire, both of which are straightforward fixes. For clocks that need professional attention, find a certified horologist in your area to keep that heirloom ticking for generations to come.