1. Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of the Master-Bilt 19-14783-BMG Sollatek Temp Control FCA-23. This component is a genuine Original Equipment Manufacturer (OEM) replacement part designed for Master-Bilt refrigeration systems.
Using genuine OEM parts ensures:
- Guaranteed Compatibility: OEM parts fit and function exactly like the original components, ensuring a perfect match.
- Higher Quality and Reliability: OEM parts are built to the same quality standards as the original components, reducing the risk of premature failure.
- Safety Assurance: Genuine parts provide peace of mind that your equipment remains safe to use.
- Warranty Maintenance: Using genuine OEM parts is less likely to void your equipment's warranty.
2. Safety Information
WARNING: Before attempting any installation, maintenance, or troubleshooting, ensure the power supply to the refrigeration unit is disconnected. Failure to do so can result in serious injury or death.
- Installation should only be performed by qualified service personnel.
- Always follow local electrical codes and regulations.
- Wear appropriate personal protective equipment (PPE), such as safety glasses and gloves.
- Inspect the part for any damage before installation. Do not install damaged parts.
3. What's in the Box
- Master-Bilt 19-14783-BMG Sollatek Temp Control FCA-23 Replacement Part

Figure 1: Overall view of the Master-Bilt 19-14783-BMG Sollatek Temp Control FCA-23. This image shows the main body of the control unit with its integrated wiring and a small adjustment knob.
4. Setup and Installation
The Master-Bilt 19-14783-BMG is a direct OEM replacement part. Installation procedures will vary depending on the specific Master-Bilt refrigeration unit it is being installed into. Always refer to the service manual for your specific refrigeration model for detailed installation instructions.
- Power Disconnection: Ensure the refrigeration unit is completely disconnected from its power source.
- Access: Gain access to the existing temperature control unit within the refrigeration system. This may involve removing panels or covers.
- Wiring Disconnection: Carefully label and disconnect all wires from the old temperature control. Note the position of each wire (e.g., Neutral, Live In, Common, Aux1, Aux2, Probe connections).
- Removal: Unmount the old temperature control unit.
- New Unit Placement: Mount the new Master-Bilt 19-14783-BMG unit in the same location.
- Wiring Connection: Reconnect the wires to the new unit according to the labels made in step 3 and the wiring diagram provided on the unit itself or in your refrigeration unit's service manual.
- Probe Installation: Ensure temperature probes (PRB 1, PRB 2) are correctly installed and positioned within the refrigeration unit as per the original setup.
- Secure Connections: Verify all electrical connections are secure and properly insulated.
- Reassembly: Reinstall any removed panels or covers.
- Power Restoration: Restore power to the refrigeration unit and test for proper operation.

Figure 2: Side view of the control unit, highlighting the "Neutral," "Live In," "Common," "Aux1," and "Aux2" wiring terminals. This view is crucial for correct electrical connections.

Figure 3: Another side view showing the temperature adjustment dial (numbered 1-9 and OFF) and the probe connections (PRB 1, PRB 2), along with D-SW (Defrost Switch) and other indicators.
5. Operating Instructions
The Sollatek Temp Control FCA-23 regulates the temperature within your Master-Bilt refrigeration unit. Operation typically involves setting the desired temperature and monitoring the unit's performance.
- Temperature Setting: Use the rotary dial (visible in Figure 3) to set the desired temperature. The numbers on the dial correspond to specific temperature ranges or settings as defined by your refrigeration unit's specifications. Turn the dial to the 'OFF' position to disable the control.
- Indicator Lights: Observe any indicator lights on the control unit or the refrigeration system's main panel. These lights typically indicate power status, compressor operation, defrost cycles, or error conditions. Refer to your refrigeration unit's manual for specific indicator meanings.
- Monitoring: Regularly monitor the temperature inside the refrigeration unit to ensure it maintains the desired set point.

Figure 4: Top view of the control unit, showing the product label with model information and a detailed table of settings and functions, including LED indicators and switch configurations. This table provides critical operational details.
6. Maintenance
The Master-Bilt 19-14783-BMG Sollatek Temp Control FCA-23 is designed for reliable operation with minimal maintenance. However, periodic checks can help ensure its longevity and proper function.
- Visual Inspection: Periodically inspect the control unit and its wiring for any signs of wear, damage, or loose connections.
- Cleaning: Keep the area around the control unit clean and free from dust and debris to prevent overheating or malfunction. Use a dry, soft cloth for cleaning. Do not use liquid cleaners directly on the unit.
- Probe Integrity: Ensure temperature probes are clean and securely positioned. Damaged or improperly placed probes can lead to inaccurate temperature readings.
7. Troubleshooting
If your refrigeration unit is not maintaining temperature or exhibiting unusual behavior, consider the following basic troubleshooting steps. For complex issues, contact a qualified service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit not cooling | Power supply issue, incorrect temperature setting, faulty probe, compressor malfunction. | Check power, verify temperature setting, inspect probe connections, consult service manual for compressor diagnostics. |
| Temperature fluctuates widely | Loose probe connection, faulty probe, control unit malfunction, poor insulation. | Secure probe, replace faulty probe, inspect unit for damage, check refrigeration unit's insulation. |
| Control unit indicator lights not working | No power to the unit, internal fault. | Verify power supply, check wiring connections. If power is present and wiring is correct, the unit may require replacement. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | 19-14783-BMG |
| Manufacturer | Master-Bilt |
| Part Type | Sollatek Temp Control FCA-23 (Genuine OEM Replacement Part) |
| Product Dimensions | 5.8 x 4.6 x 2.4 inches |
| Item Weight | 1 Pound |
| ASIN | B0BQSS4X75 |
9. Warranty and Support
As a genuine Master-Bilt OEM part, this product is covered by Master-Bilt's standard warranty for replacement parts. Please refer to your original equipment documentation or contact Master-Bilt customer service for specific warranty terms and conditions.
For technical support, service, or to inquire about other genuine Master-Bilt parts, please contact Master-Bilt directly or an authorized Master-Bilt service provider. Always provide the model number (19-14783-BMG) and the serial number of your refrigeration unit when seeking support.