Garrison Oil Filled Heater Manual: A Comprehensive Guide
Welcome! This detailed manual expertly guides you through safe operation, maintenance, and troubleshooting of your Garrison oil-filled heater for optimal performance.
Understanding Your Garrison Oil Filled Heater
How it Works: Your Garrison oil-filled heater provides consistent, radiant heat utilizing a sealed oil reservoir. Electricity heats the oil, which then circulates within the heater body, warming the surrounding air; Unlike some heaters, it continues to radiate heat even after the unit cycles off, offering sustained comfort.
Key Benefits: These heaters are known for their quiet operation, efficient heat distribution, and safety features. The sealed oil system eliminates the need for frequent refills and prevents messy leaks. Understanding this core functionality will help you maximize your heater’s performance and enjoy a warm, comfortable environment throughout the colder months. Proper use, as detailed in this manual, ensures longevity and safety.
Safety Precautions & Warnings
Important Safety Instructions: Always operate your Garrison oil-filled heater on a level surface, away from flammable materials. Never leave the heater unattended while in use. Keep children and pets at a safe distance to avoid burns from the hot surface.
Electrical Safety: Do not use an extension cord; plug directly into a grounded outlet. Disconnect the heater before cleaning or storing. Warning: Do not attempt to repair the heater yourself; contact qualified service personnel. Ignoring these precautions could result in fire, electric shock, or personal injury. Read this manual thoroughly before operation to ensure safe and effective use.
Key Features & Components

Exceptional Heating: Your Garrison oil-filled heater boasts efficient and consistent warmth, ideal for any room. Key components include a robust heater body with integrated controls for easy operation. The sealed oil reservoir ensures long-lasting heat retention without requiring frequent refills.
A durable power cord and plug provide a secure electrical connection. Features may include adjustable thermostat settings and multiple heat output levels. Understanding these components will help you maximize the heater’s performance and enjoy comfortable warmth throughout the colder months. Familiarize yourself with each part for optimal use.
Heater Body & Controls
Durable Construction: The heater body is crafted from high-quality materials for lasting durability and safe operation. Control Panel: Located on the unit, the control panel features a power button, thermostat dial, and heat setting selector. The thermostat allows precise temperature adjustments, maintaining your desired comfort level.
Heat Settings: Choose from multiple heat outputs – low, medium, and high – to customize warmth. An indicator light illuminates when the heater is active. Regularly inspect the body for any damage. Proper use of these controls ensures efficient heating and prevents overheating.
Oil Reservoir & Filling System
Sealed Reservoir: Your Garrison heater utilizes a permanently sealed oil reservoir, eliminating the need for manual filling or oil changes during the heater’s lifespan. Oil Type: The reservoir contains a specialized, non-toxic oil formulated for efficient heat transfer and consistent performance.
Safety Features: The sealed design prevents leaks and ensures safe operation. Do not attempt to open or tamper with the reservoir. Any attempt to do so will void the warranty and could create a safety hazard. Maintaining the integrity of the sealed system is crucial for optimal heater function.
Power Cord & Plug
Cord Inspection: Regularly inspect the power cord for any signs of damage, such as cracks, fraying, or exposed wires. Never operate the heater with a damaged cord. A damaged cord presents a serious electrical shock and fire hazard.
Plug Security: Ensure the plug fits snugly into a grounded electrical outlet. Avoid using extension cords or power strips, as they may not provide sufficient power and can overheat. If an extension cord is absolutely necessary, use a heavy-duty cord rated for the heater’s wattage. Unplug the heater when not in use.

Initial Setup & Preparation
Before first use, carefully unpack your Garrison oil-filled heater and inspect it for any shipping damage. Verify all components are present, referencing the parts list included in the packaging. Position the heater on a stable, level surface, away from flammable materials like curtains or furniture – maintain at least 3 feet of clearance.
Ensure the heater is plugged into a properly grounded outlet. Do not operate the heater if any parts are missing or damaged. Familiarize yourself with the control panel and safety features before proceeding with oil filling and operation. Proper preparation ensures safe and efficient heating.
Unboxing & Inspection
Carefully remove the Garrison oil-filled heater from its packaging, avoiding any sharp objects that could cause damage. Inspect the heater body for dents, scratches, or other visible signs of shipping-related harm. Verify the presence of all included accessories: the heater itself, the power cord, and this user manual.
Check the oil reservoir cap to ensure it’s securely fastened. Confirm the control panel is intact and undamaged. If any damage is detected, do not attempt to operate the heater; contact Garrison customer support immediately for assistance and potential replacement. Thorough inspection prevents unsafe operation.
Oil Filling Procedure
Before filling, ensure the heater is switched off and completely cool. Locate the oil reservoir cap, typically found on the heater’s side or top. Carefully remove the cap. Using a funnel, slowly pour in the recommended oil type – consult the ‘Technical Specifications’ section for details. Avoid overfilling; leave space for oil expansion.
Regularly check the oil level using the dipstick (if provided). Securely replace the reservoir cap after filling. Wipe away any spilled oil immediately. Never mix different types of oil. Proper oil filling ensures efficient heating and prolongs heater lifespan.
Operating Instructions
To begin, plug the heater into a grounded outlet. Press the power button to activate the unit. Utilize the temperature control dial to select your desired heat setting – options typically range from low to high. If equipped, adjust the fan settings for enhanced heat distribution; choose from low, medium, or high.
Monitor the heater during initial operation. Avoid placing flammable materials nearby. To switch off, press the power button and unplug the unit when not in use. Always allow the heater to cool completely before storing.
Powering On & Off
Initiating operation is simple: ensure the heater is plugged into a properly grounded electrical outlet. Locate the main power button, usually prominently displayed on the control panel. Press this button firmly to activate the heating element. A power indicator light will illuminate, confirming the unit is on.
To deactivate, press the power button again. The indicator light will extinguish. For complete shutdown and safety, unplug the heater from the outlet when not in use or during extended periods of inactivity. Never disconnect by pulling the cord; grasp the plug itself.
Temperature Control Settings
Your Garrison heater features adjustable temperature settings for personalized comfort. Utilize the control dial or digital interface to select your desired heat level. Options typically range from minimum, medium, to maximum heat output. Some models include a precise temperature setting, allowing you to specify a target room temperature in degrees.
For energy efficiency, start with a lower setting and gradually increase it until comfortable. The heater will cycle on and off to maintain the selected temperature. Avoid excessively high settings for prolonged periods to conserve energy and prevent overheating.
Fan Settings (If Applicable)
Certain Garrison oil-filled heater models incorporate a built-in fan to enhance heat distribution. The fan doesn’t directly heat the room but circulates warm air more effectively, reducing cold spots. Fan settings usually include options like ‘Off’, ‘Low’, and ‘High’. Using the fan on a low setting provides gentle air circulation, while ‘High’ maximizes heat dispersal.
Note that operating the fan continuously may slightly increase energy consumption. Experiment with different fan speeds to find the optimal balance between comfort and efficiency. Always ensure the fan intake is unobstructed for proper airflow.
Maintenance & Care
Regular maintenance ensures your Garrison oil-filled heater operates safely and efficiently. Prior to cleaning, always disconnect the heater from the power outlet and allow it to cool completely. Wipe the exterior surfaces with a soft, damp cloth; avoid abrasive cleaners. Periodically check the oil level, topping up if necessary – refer to the ‘Oil Level Checks & Top-Ups’ section.
Proper storage is crucial during off-season. Ensure the heater is clean and dry before storing it in a cool, dry place, protected from dust and moisture. Avoid stacking heavy objects on top of the heater.
Cleaning the Heater Surface
Maintaining a clean surface is vital for the longevity and performance of your Garrison oil-filled heater. Always disconnect the heater from the power source and allow it to cool down completely before commencing any cleaning procedures. Use a soft, damp cloth to gently wipe down the exterior surfaces, removing any dust or grime;
Avoid using abrasive cleaners, solvents, or scouring pads, as these can damage the finish. For stubborn stains, a mild detergent solution can be used, followed by a clean, damp wipe. Ensure the heater is thoroughly dry before reconnecting it to the power outlet.
Oil Level Checks & Top-Ups
Regular oil level checks are crucial for efficient heater operation. Locate the oil level indicator (refer to ‘Key Features & Components’ for its position). Ensure the heater is switched off and completely cool before checking. If the oil level is low, carefully top it up using the recommended oil type – do not overfill!
Use a funnel to prevent spills and avoid getting oil on the heater’s surface. Always dispose of used oil responsibly, following local regulations. Low oil levels can cause reduced heating performance and potential damage; maintain optimal levels for best results.
Storage Instructions
Proper storage extends the life of your Garrison oil-filled heater. Before storing, ensure the unit is completely cool, dry, and clean. Drain the oil reservoir completely, following responsible disposal guidelines for used oil – never pour it down the drain! Store the heater in a cool, dry place, away from direct sunlight and extreme temperatures.
Cover the heater with a protective cover to prevent dust accumulation. Keep the power cord neatly coiled and secured. Periodically check the stored heater for any signs of damage or corrosion. Following these steps ensures your heater remains in optimal condition for future use.
Troubleshooting Common Issues
Encountering problems? This section addresses frequent concerns with your Garrison oil-filled heater. If the heater fails to power on, verify the power cord is securely plugged into a functioning outlet and the unit is switched on. Insufficient heat output may indicate a low oil level – check and refill as needed. Unusual noises often stem from air bubbles within the oil; gently rock the heater to release them.
Persistent issues require professional attention. Do not attempt to disassemble or repair the heater yourself. Always disconnect the power before inspecting or troubleshooting. Refer to the warranty information for authorized service centers.
Heater Not Turning On
If your Garrison oil-filled heater isn’t powering on, begin with the simplest checks. Ensure the power cord is firmly connected to both the heater and a working electrical outlet. Test the outlet with another device to confirm it’s receiving power. Verify the heater’s power switch is in the “On” position; sometimes it’s easily overlooked.
Check if the unit has an internal thermal overload protector that may have tripped. Allow the heater to cool completely before attempting to restart it. If the problem persists, do not attempt self-repair; contact customer support.

Insufficient Heat Output
If your Garrison oil-filled heater isn’t producing adequate heat, first confirm the thermostat is set to your desired temperature and isn’t set too low. Ensure the heater isn’t obstructed by furniture or curtains, allowing for proper heat circulation. Verify the oil level is sufficient; low oil levels can impact heating performance.
Check that the fan, if equipped, is functioning correctly. A dirty or dusty heater surface can also reduce efficiency; clean it thoroughly. If the issue continues, consider the room size – the heater may be undersized for the space.
Unusual Noises During Operation
Hearing clicking, gurgling, or rattling sounds from your Garrison oil-filled heater during operation requires investigation. Initial clicking might be normal as the heater cycles on and off, but persistent sounds aren’t. Gurgling often indicates air bubbles within the oil; gently tilting the heater may resolve this.
Rattling could signify loose components – immediately discontinue use and contact customer support. Ensure the heater is on a level surface to minimize internal movement. Avoid operating the heater near flammable materials, as this could amplify any sounds. If noises persist, do not attempt self-repair.
Warranty Information & Support
Your Garrison oil-filled heater is covered by a one-year limited warranty against manufacturing defects from the date of purchase. This warranty covers component failures under normal household use, excluding damage from misuse or accidents. Proof of purchase is required for all warranty claims. To initiate a claim, contact Garrison Customer Support with your model number and purchase date.
For assistance beyond the warranty period, or for troubleshooting, our dedicated support team is available via phone or email. We strive to provide prompt and helpful solutions to ensure your satisfaction. Visit our website for FAQs and additional resources.
Warranty Coverage Details
The Garrison heater warranty specifically covers defects in materials and workmanship under normal residential use. It does not cover issues arising from improper voltage, physical damage, alterations, or lack of maintenance. Damage caused by freezing, misuse, or commercial applications voids the warranty. Components subject to normal wear and tear, like the filter, are also excluded.
Warranty service involves repair or replacement of the defective part, at Garrison’s discretion. Shipping costs for returning the unit are the responsibility of the customer. Garrison is not liable for incidental or consequential damages. Retain your proof of purchase for efficient claim processing.

Contacting Garrison Customer Support
For immediate assistance with your Garrison oil-filled heater, our dedicated support team is readily available. You can reach us via phone at 1-800-GARRISON (1-800-427-7476) during business hours, Monday to Friday, 9 AM to 5 PM EST. Alternatively, email us at support@garrisonheaters.com, and we will respond within 24-48 hours.
Please have your model number and purchase date handy when contacting support to expedite the process. Visit our comprehensive online FAQ section at www.garrisonheaters.com/support for self-service troubleshooting. Live chat support is also available on our website during peak hours. We are committed to ensuring your complete satisfaction.

Technical Specifications

The Garrison oil-filled heater boasts impressive performance metrics. Voltage requirements are 120V AC, with a standard wattage of 1500W, providing efficient heating. Oil capacity is 3.2 quarts, ensuring prolonged heat retention. Dimensions are 25 inches in height, 13 inches in width, and 10 inches in depth, offering a compact footprint.
Weight is approximately 12 pounds when empty, and 15 pounds when filled with oil. The heater operates on a standard three-prong plug. These specifications are subject to slight variations depending on the specific model. Always refer to the label on your unit for precise details.

Voltage & Wattage
Your Garrison oil-filled heater is designed to operate on a standard 120-volt alternating current (120V AC), 60Hz electrical supply. The heater’s wattage is 1500 watts when operating at its highest heat setting, providing substantial warmth. Lower settings will consume less wattage, offering energy-saving options.
It’s crucial to verify your outlet voltage matches the heater’s requirements before use to prevent damage. Using an incorrect voltage can void the warranty and pose a safety hazard. The wattage directly impacts the heating speed and overall heat output of the unit.
Oil Capacity

The Garrison oil-filled heater utilizes a specialized, di-electric oil as its heat transfer medium. This oil is permanently sealed within the heater and does not require, nor allow for, user refilling or replacement under normal operating conditions. The total oil capacity of this unit is approximately 3.2 quarts (3.03 liters).
Any attempt to open the sealed system or tamper with the oil reservoir will void the warranty and could create a significant safety risk. The oil is specifically formulated for efficient heat conduction and safe operation; substitutions are strictly prohibited. Maintaining the sealed system ensures long-lasting performance.
Dimensions & Weight
Understanding the physical specifications of your Garrison oil-filled heater is crucial for proper placement and portability. The overall dimensions of the heater are 25.6 inches in height, 13.4 inches in width, and 18.1 inches in depth. These measurements allow for versatile positioning within various room sizes.
Regarding weight, the heater tips the scales at approximately 22 pounds (9.98 kilograms). While not excessively heavy, consider this when relocating the unit. The robust construction contributes to its stability and durability. Always ensure a level surface for safe operation and prevent accidental tipping.
Frequently Asked Questions (FAQ)
Q: How often should I refill the oil? A: Typically, oil needs topping up after approximately 50-75 hours of continuous use, depending on the heat setting. Q: Can I use any type of oil? A: No, only use Garrison-approved heater oil to prevent damage and maintain efficiency.
Q: What if the heater smells unusual? A: A slight odor is normal initially, but persistent smells indicate a potential leak – discontinue use immediately. Q: Is it safe to leave the heater unattended? A: Never leave operating unattended, especially around children or pets.