Intermatic Light Timer Instructions: A Comprehensive Guide
This guide provides detailed instructions for installing, programming, and troubleshooting Intermatic light timers, covering various models like FM1D14 and PE15300 series.
Learn about safety precautions, operating modes (automatic & manual), and understanding LED indicators for optimal performance of your Intermatic timer.
Understanding Intermatic Timers
Intermatic timers are versatile devices designed to automate the control of lighting and other electrical loads. These timers offer convenience, energy savings, and enhanced security by simulating occupancy when you’re away.
They function by switching circuits on and off based on pre-programmed schedules, eliminating the need for manual operation.
Different Intermatic models, such as the FM1D14 and PE15300 series, cater to diverse needs, offering features like digital programming, manual override, and various voltage ratings. Understanding the specific features of your model is crucial for effective use. The timers utilize a combination of a real-time clock and programmed settings to manage power distribution.
Timer Specifications & Models
Intermatic offers a range of timers designed for various applications. Key specifications include voltage ratings of 120-277 VAC, 12 VDC, and 24 VAC/VDC, ensuring compatibility with different electrical systems.
The frequency supported is typically 50/60 Hz, accommodating both North American and European standards.
Popular models include the FM1D14 series, known for its digital programming, and the PE15300 series, often used for outdoor lighting control. Each model has specific load capacities and features. Selecting the appropriate model depends on the voltage requirements of the connected devices and desired control features.
Voltage Ratings (120-277 VAC, 12 VDC, 24 VAC/VDC)
Intermatic timers accommodate a wide range of voltage requirements. 120-277 VAC models are suitable for standard household and commercial lighting circuits.
12 VDC timers are commonly used for low-voltage landscape lighting and other DC-powered applications.
24 VAC/VDC timers offer versatility, supporting both alternating and direct current systems. It’s crucial to select a timer with a voltage rating that matches the connected load to prevent damage or malfunction. Always verify the voltage of your devices before installation to ensure compatibility and safe operation.
Frequency (50/60 Hz)
Intermatic timers are designed to operate effectively with either 50 Hz or 60 Hz frequency, providing global compatibility.
This dual-frequency capability ensures the timer functions correctly regardless of the electrical standard in your region.
Most models automatically detect the input frequency, eliminating the need for manual adjustments. However, it’s essential to confirm compatibility, especially when using timers with specialized loads. Proper frequency matching guarantees accurate timing and reliable performance of your lighting control system.
Safety Precautions
Important: Always disconnect power at the breaker before installing or servicing an Intermatic timer.
Do NOT use timers to control devices where timing inaccuracies could create hazardous situations, such as sun lamps or life-support systems.
Ensure the timer’s voltage and load ratings are compatible with the connected devices. Improper wiring can cause fire or electrical shock. Utilize the manual override function cautiously, understanding it bypasses programmed schedules. Always follow local electrical codes and consult a qualified electrician if unsure about any aspect of the installation.
Avoiding Dangerous Applications (Sun Lamps, etc.)
Critical Safety Warning: Intermatic timers must not control devices where inaccurate timing could lead to hazardous outcomes. Specifically, avoid using them with sun lamps, medical equipment, or heating systems reliant on precise timing.
These applications demand unwavering reliability, and timer malfunctions could pose serious risks. Similarly, refrain from using timers with devices involving flammable materials or those requiring constant, uninterrupted operation. Prioritize safety by selecting appropriate control methods for critical applications, ensuring dependable and accurate performance.
Manual Override Functionality
The Intermatic timer features a convenient slide switch for manual operation, overriding the programmed schedule. Moving the switch to the “ON” position activates the connected load regardless of the timer settings. This is useful for temporary control or when deviating from the regular schedule is needed.
Importantly, the stored program remains intact while in manual mode. Returning the slide switch to the “AUTO” position resumes the programmed timing. The red indicator light confirms operation, and power cycling preserves the settings, ensuring seamless transitions between modes.
Installation Process
Begin the installation by powering off the circuit at the wall switch, ensuring safety. Securely mount the Intermatic timer, inserting the appropriate screw for a stable fit. Carefully connect the wiring according to the timer’s diagram – typically involving line, load, and neutral wires.
For FM1D14 series, follow the specific wiring instructions. After wiring, restore power to the circuit. Move the control lever to the “ON” position to initiate operation. Verify the AM/PM indicator functions correctly, confirming proper setup and readiness for programming.

Step 1: Power Off & Timer Mounting
Prioritize safety by completely powering off the circuit at the wall switch before commencing installation. This prevents electrical shock. Once the power is off, carefully select a suitable mounting location for your Intermatic timer.
Securely attach the timer using the provided mounting hardware. Insert the timer screw to firmly fix it in place. Ensure the timer is mounted in a dry location, protected from the elements. Double-check the stability of the mounting before proceeding to the wiring stage, guaranteeing a safe and reliable setup.
Step 2: Wiring the Timer (FM1D14 Series)
For the FM1D14 series, carefully follow the wiring diagram specific to your model (12VDC, 24VAC/VDC, or 120-277VAC). Connect the line (hot) wire to the designated terminal, and the load wire to its corresponding terminal.
Ensure all connections are secure and comply with local electrical codes. A neutral wire may also be required depending on the voltage rating. Double-check all wiring before restoring power. Improper wiring can damage the timer or create a safety hazard. Refer to the user manual (PDF) for detailed diagrams.
Setting the Clock
To accurately set the clock on your Intermatic timer, begin by pressing and holding the “Clock” button. This activates the clock setting mode. Next, use the “H” button to advance the hour to the current time. Continue pressing “H” until the correct hour is displayed, observing the AM/PM indicator.
Then, utilize the “M” button to adjust the minutes. Each press of “M” will increment the minutes until the correct time is set. Release the “Clock” button to save the new time. Verify the correct time display before programming the timer.
Press and Hold the “Clock” Button
Initiating the clock setting process on your Intermatic timer requires a simple, yet crucial step: pressing and holding the designated “Clock” button. This action signals the timer to enter clock adjustment mode, allowing you to accurately program the current time.
Continue holding the button until the hour display begins to flash, indicating it’s ready for adjustment. Releasing the button prematurely may exit the setting mode. This is the first step towards ensuring your timer operates based on the correct time, vital for automated scheduling.

Adjusting the Hour (H Button)
Once the hour display is flashing – activated by holding the “Clock” button – utilize the “H” button to adjust the current hour. Each press of the “H” button will increment the hour forward. Continue pressing until the display reflects the correct hour of the day.
Pay close attention to the AM/PM indicator, ensuring it accurately represents the current time of day. After setting the desired hour, proceed to the next step to adjust the minutes, completing the time setting process for your Intermatic timer.
Adjusting the Minutes (M Button)
After correctly setting the hour using the “H” button, the minute display will automatically begin to flash. Now, press the “M” button to adjust the current minutes. Each press of the “M” button will increment the minute display forward by one minute.
Continue pressing the “M” button until the display accurately reflects the current minutes. Once the correct time is set, release the “Clock” button. The timer will then save the new time and return to displaying the current time, ready for programming or operation.
Programming the Timer
To begin programming your Intermatic timer, firmly press the “Prog” button. This action initiates the programming mode, allowing you to set on and off times for automated control. The display will likely begin flashing, indicating it’s ready to accept programming input.

Refer to your specific model’s manual for detailed instructions on setting individual on/off events. Typically, you’ll use the “H” and “M” buttons to define the desired time for each event. Remember to save your program after making changes!
Pressing the “Prog” Button
Pressing the “Prog” button is the crucial first step in setting up your Intermatic timer’s schedule. This action activates the programming mode, allowing you to define specific on and off times for your connected lights or devices. The timer’s display will respond, usually by flashing, to confirm it’s now in programming mode.
After pressing “Prog”, utilize the “H” (Hour) and “M” (Minute) buttons to input your desired schedule. Consult your timer’s user manual for model-specific programming details and ensure you save your settings!
Operating Modes
Intermatic timers offer versatile operating modes to suit your needs. Automatic Mode allows the timer to follow the programmed schedule you’ve created, turning lights on and off at the designated times. For immediate control, utilize Manual (MAN) Mode.
This is achieved using the slide switch, overriding the programmed schedule. The switch position dictates whether the load (connected device) is ON or OFF, regardless of the timer’s settings. Remember to return the switch to “Auto” to resume scheduled operation.
Automatic Mode
In Automatic Mode, the Intermatic timer diligently follows the programmed on/off schedule you’ve established. This is the default setting, ensuring lights or connected devices operate without manual intervention. The timer precisely executes the timing instructions, providing consistent and reliable control.
To ensure proper function, verify the clock is accurately set and the program is correctly configured. The stored program remains active even during power outages, resuming operation upon power restoration. This mode is ideal for consistent lighting schedules, enhancing security and convenience.

Manual (MAN) Mode – Using the Slide Switch
Manual Mode offers direct control, overriding the programmed schedule. Activate this mode by moving the slide switch to the “ON” position; the connected load will immediately turn on, regardless of the timer’s settings. Conversely, sliding it to “OFF” will disable the load.
This feature is useful for temporary lighting needs or when deviating from the regular schedule. Remember, the programmed schedule is suspended while in Manual Mode. Returning the switch to “AUTO” restores the timer’s programmed operation, resuming the pre-set timing instructions.
LED Indicator Lights
LEDs provide visual status of the Intermatic timer. A red indicator light signifies the relay is energized, meaning the connected load is currently receiving power. When the light is off, the load is de-energized.
During programming, the red light may flash to confirm button presses or indicate specific settings. If the light doesn’t illuminate when the timer should be on, check the wiring and power supply. Understanding the LED’s behavior is crucial for quickly diagnosing operational status and troubleshooting potential issues with your timer.

Understanding the Red Indicator Light
The red indicator light on your Intermatic timer is a key diagnostic tool. A steady red light confirms the timer’s relay is energized, and the connected device is receiving power as programmed. Conversely, a light that is off indicates the load is currently de-energized, following the timer’s schedule.
A flashing red light often signals the timer is in programming mode or indicates a specific error. Refer to your model’s manual for specific flash code meanings. Consistent monitoring of this light helps verify correct operation and quickly identify potential wiring or programming issues.
Troubleshooting Common Issues
Timer Not Turning On: First, verify power is reaching the timer itself. Check the circuit breaker and wiring connections. Ensure the slide switch isn’t in the “MAN” (manual) position, overriding the programmed schedule.

Incorrect Time Display: If the time is wrong, re-set the clock by pressing and holding the “Clock” button, then using the “H” and “M” buttons to adjust the hour and minutes. Confirm AM/PM is correctly set. If issues persist, consult the user manual or Intermatic’s support resources.
Timer Not Turning On
If your Intermatic timer fails to power on, begin by confirming the power source. Check the associated circuit breaker or fuse to ensure it hasn’t tripped or blown. Carefully inspect all wiring connections to the timer, verifying they are secure and correct, referencing the wiring diagram for your specific model (like the FM1D14 series).
Also, double-check the slide switch position; if set to “MAN,” it overrides the programmed schedule. Ensure it’s in “AUTO” for timed operation. If the problem continues, consult the full user manual (PDF available online) for further diagnostic steps.

Incorrect Time Display

An inaccurate time display on your Intermatic timer usually indicates a need for resetting the clock. To correct this, press and hold the “Clock” button until the hour display begins to flash. Use the “H” button to adjust the hour and the “M” button to adjust the minutes, ensuring the correct AM/PM setting is selected.
Confirm the timer is in “AUTO” mode, as manual override can sometimes interfere with timekeeping. If the issue persists, a brief power interruption might have reset the internal clock; simply repeat the clock-setting procedure. Refer to the user manual (PDF) for detailed instructions.
Warranty Information
Intermatic Incorporated provides a warranty covering defects in material or workmanship for its light timers. If a product fails within the specified warranty period, Intermatic will, at its sole discretion, repair or replace the defective item free of charge.
This warranty does not cover damage resulting from misuse, improper installation, or applications not recommended in the instructions. To initiate a warranty claim, contact Intermatic customer support with proof of purchase. Detailed warranty terms and conditions are available in the product documentation (PDF).
Defect in Material or Workmanship
This aspect of the Intermatic warranty specifically addresses failures stemming from flaws in the materials used during manufacturing or errors in the construction of the light timer. If a component breaks or malfunctions due to a manufacturing issue, it’s covered.
However, the warranty doesn’t extend to problems caused by normal wear and tear, accidental damage, incorrect installation, or using the timer in a way not outlined in the provided instructions. Proof of purchase is essential for any claim related to a defect.
Repair or Replacement Options
If your Intermatic light timer fails due to a covered defect within the warranty period, Intermatic Incorporated has the sole discretion to either repair the faulty unit or provide a replacement. The chosen option will be determined by Intermatic based on the nature of the defect and product availability.
To initiate a warranty claim, you’ll need to contact Intermatic customer support with proof of purchase and a detailed description of the issue. Returning the defective timer may be required for inspection before a repair or replacement is authorized.
Intermatic PE15300 Series Overview

The Intermatic PE15300 series represents a robust line of digital timers designed for diverse applications. These timers offer enhanced programming capabilities and accuracy compared to mechanical models. They are commonly used for controlling landscape lighting, indoor lighting, and various electrical devices.
Key features include multiple on/off settings, a built-in photocell option for dusk-to-dawn operation, and a user-friendly interface. Accessing the manual (PDF) and technical specifications (PDF) is crucial for proper installation and operation of these advanced timers.
Additional Resources
For comprehensive support with your Intermatic light timer, several resources are readily available. User manuals (PDF) provide detailed step-by-step instructions, troubleshooting tips, and safety information specific to each model, like the PE15300.
Technical specifications (PDF) offer in-depth details regarding voltage ratings, frequency compatibility (50/60 Hz), and wiring diagrams. Explore Intermatic’s official website for FAQs, instructional videos, and contact information for customer support. These resources ensure successful installation and operation of your timer.
User Manuals (PDF)
Intermatic’s user manuals (PDF) are essential resources for understanding your specific timer model, such as the FM1D14 series or PE15300. These manuals provide detailed instructions for installation, wiring, clock setting, and programming procedures.
You’ll find clear explanations of operating modes – automatic and manual – alongside troubleshooting guides for common issues like timers not turning on or displaying incorrect times. Downloadable PDFs ensure you have readily accessible guidance for safe and effective operation, covering all aspects of your Intermatic light timer.
Technical Specifications (PDF)
Intermatic’s technical specifications (PDF) offer in-depth details about your light timer’s capabilities. These documents outline crucial information like voltage ratings – including 120-277 VAC, 12 VDC, and 24 VAC/VDC – and frequency compatibility (50/60 Hz).
You’ll find precise data regarding resistive load ratings and operating temperatures, vital for ensuring safe and optimal performance. These specifications are essential for verifying compatibility with your intended application and understanding the timer’s limitations, supporting proper instructions and installation.
