1. Important Safety Instructions
Please read all instructions carefully before using this heater. Failure to follow these instructions may result in fire, electric shock, injury, or property damage.
- Do not use this heater outdoors or in wet locations like bathrooms or laundry areas.
- This heater is hot when in use. To avoid burns, do not let bare skin touch hot surfaces.
- Keep combustible materials, such as furniture, pillows, bedding, papers, clothes, and curtains at least 3 feet (0.9 meters) from the front of the heater and keep them away from the sides and rear.
- Extreme caution is necessary when any heater is used by or near children or invalids and whenever the heater is left operating and unattended.
- Always unplug the heater when not in use.
- Do not operate any heater with a damaged cord or plug or after the heater malfunctions, has been dropped, or damaged in any manner.
- Do not run power cord under carpeting. Do not cover cord with throw rugs, runners, or similar coverings. Arrange cord away from traffic area and where it will not be tripped over.
- To disconnect heater, turn controls to OFF, then remove plug from outlet.
- Do not insert or allow foreign objects to enter any ventilation or exhaust opening as this may cause an electric shock or fire, or damage the heater.
- To prevent a possible fire, do not block air intakes or exhaust in any manner. Do not use on soft surfaces, like a bed, where openings may become blocked.
- This heater is for use on 120 Volts. The cord has a plug as shown in the image below.

Figure 1: OSTBA PTC-919 Ceramic Space Heater. This image shows the front view of the black ceramic space heater with its control knobs on top.
2. Product Overview
The OSTBA PTC-919 Ceramic Space Heater is a portable electric heater designed for indoor use, offering efficient heating with safety features. It includes adjustable thermostat control and multiple operating modes.
Key Features:
- 1500W Power: Provides powerful heating for small to medium-sized rooms.
- PTC Ceramic Heating: Ensures rapid and efficient heat generation.
- Adjustable Thermostat: Allows precise temperature control from 41°F to 95°F.
- Multiple Modes: Fan Only, Low Heat (750W), and High Heat (1500W).
- Tip-Over Protection: Automatically shuts off the heater if it is accidentally tipped over.
- Overheat Protection: Automatically shuts off the heater if it reaches an unsafe temperature.
- Compact and Portable Design: Easy to move and place in various locations.

Figure 2: Compact and Portable Design. This image illustrates the heater's compact size with dimensions: 8.94 inches height, 6.5 inches width, and 5.08 inches depth, making it easy to place in various indoor settings.

Figure 3: Operating Modes. This image shows the heater in operation, highlighting its three modes: 750W Low Heat, 1500W High Heat, and Fan Mode for year-round comfort.
Safety Features:

Figure 4: Smart Tip-Over Protection. The heater automatically powers off if it is tipped over by more than 45 degrees, as illustrated by the heater tilting and an 'OFF' indicator.

Figure 5: Safe Overheat Protection. The heater is equipped with an internal sensor that automatically shuts it off if the internal temperature exceeds 105°C (221°F) to prevent overheating.
3. Setup
- Unpacking: Carefully remove the heater from its packaging. Retain the packaging for future storage.
- Placement: Place the heater on a firm, level surface. Ensure there is at least 3 feet (0.9 meters) of clear space around the heater from any combustible materials. Do not place it on soft surfaces like rugs or carpets that could block the air intake.
- Power Connection: Plug the power cord directly into a 120V AC, 60Hz wall outlet. Do not use extension cords or power strips, as this may create a fire hazard. Ensure the outlet is not overloaded with other high-wattage appliances.
4. Operating Instructions
The heater features two rotary knobs on the top panel for mode selection and thermostat control.

Figure 6: Control Panel. This diagram shows the two rotary switches on the top of the heater: the left knob for mode selection and the right knob for thermostat adjustment. A power indicator light is also visible.
Mode Selection (Left Knob):
- O (Off): Turns the heater completely off.
- Fan Only (Fan Icon): Activates the fan without heat, providing air circulation.
- I (Low Heat): Operates the heater at 750W for moderate warmth.
- II (High Heat): Operates the heater at 1500W for maximum heat output.
Thermostat Control (Right Knob):
- Turn the thermostat knob clockwise to increase the desired temperature.
- Turn the thermostat knob counter-clockwise to decrease the desired temperature.
- The heater will cycle on and off to maintain the set temperature.
Operating Steps:
- Plug the heater into a suitable 120V outlet.
- Turn the left knob (Mode Selector) to your desired setting: Fan Only, Low Heat (I), or High Heat (II). The power indicator light will illuminate.
- Adjust the right knob (Thermostat Control) to your preferred temperature. For continuous heating, turn the thermostat knob to its maximum setting.
- To turn off the heater, rotate the left knob (Mode Selector) to the 'O' (Off) position and unplug the unit from the wall outlet.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your heater.
Cleaning:
- Always unplug the heater and allow it to cool completely before cleaning.
- Use a soft, damp cloth to wipe the exterior surfaces of the heater. Do not use abrasive cleaners or solvents.
- Gently vacuum the air intake and exhaust grilles to remove dust and lint. Do not allow water to run into the interior of the heater.
Storage:
- When not in use, store the heater in a cool, dry location.
- It is recommended to store the heater in its original packaging to protect it from dust and damage.
6. Troubleshooting
If your heater is not operating correctly, please refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater does not turn on. | No power to the unit. | Ensure the power cord is securely plugged into a working 120V outlet. Check the household circuit breaker. |
| Heater stops operating. | Overheat protection activated. | Unplug the heater, allow it to cool for 30 minutes. Check for obstructions to air intake/exhaust. Re-plug and restart. |
| Heater stops operating. | Tip-over protection activated. | Place the heater on a firm, level surface. If it was tipped, it will automatically reset once upright. |
| No heat output in heat modes. | Thermostat set too low. | Increase the thermostat setting by turning the right knob clockwise. |
| Heater is noisy. | Dust or debris in fan/heating element. | Unplug and clean the heater as per maintenance instructions. |
If the problem persists after attempting these solutions, please contact customer support.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | PTC-919 |
| Power Supply | 120V AC, 60Hz |
| Power Consumption | 750W (Low Heat), 1500W (High Heat) |
| Heating Element | PTC Ceramic |
| Dimensions (L x W x H) | 6.1 x 7.28 x 10.12 inches (15.5 x 18.5 x 25.7 cm) |
| Safety Features | Tip-Over Protection, Overheat Protection |
| Certifications | ETL Listed |
8. Warranty and Support
This OSTBA PTC-919 Ceramic Space Heater comes with a standard manufacturer's warranty. For specific warranty details, including duration and coverage, please refer to the warranty card included with your purchase or contact OSTBA customer support directly.
Customer Support:
For technical assistance, troubleshooting, or warranty claims, please contact OSTBA customer support through their official website or the contact information provided in your product packaging.