Introduction
This manual provides essential information for the safe and effective use of your new ClimaTek Round Capacitor. This component is designed as a direct replacement for Coleman part numbers 1499-4931 and 1499-4921, and is suitable for various HVAC applications. Please read this manual thoroughly before installation and operation to ensure proper function and longevity of the product.
Safety Information
WARNING: Capacitors can store a dangerous electrical charge even after power is disconnected. Always discharge the capacitor before handling. Failure to do so can result in severe injury or death.
- Always disconnect power to the HVAC unit before attempting any installation or maintenance.
- Use insulated tools when working with electrical components.
- If you are not familiar with electrical work, consult a qualified HVAC technician.
- Ensure the replacement capacitor matches the specifications (MFD and VAC) of the original unit.
- Wear appropriate personal protective equipment (PPE), including safety glasses and insulated gloves.
Product Overview
The ClimaTek Round Capacitor is a critical electrical component used in HVAC systems, primarily for starting and running motors in air conditioners and heat pumps. It stores electrical energy and releases it to provide a boost to the motor during startup and to maintain efficient operation.

Figure 1: Front view of the ClimaTek Round Capacitor, showing the terminals and product label with specifications.

Figure 2: ClimaTek Round Capacitor shown alongside its retail packaging.

Figure 3: Diagram illustrating the dimensions of the ClimaTek Round Capacitor, showing a height of 3.25 inches and a diameter of 2 inches.

Figure 4: Top-down view of the capacitor, clearly showing the three terminal connections labeled "HERM", "FAN", and "C" (Common).
Setup and Installation
Proper installation is crucial for the capacitor's performance and safety. Follow these steps carefully:
- Power Disconnection: Locate the main power switch for your HVAC unit (usually at the outdoor condenser unit or indoor furnace/air handler) and turn it OFF. Verify power is off using a multimeter.
- Access Capacitor: Open the access panel on your HVAC unit to expose the existing capacitor.
- Discharge Old Capacitor: Using a screwdriver with an insulated handle, short the terminals of the old capacitor to discharge any residual electrical charge. Be cautious, as a spark may occur.
- Note Wiring: Carefully note or take a picture of the wiring connections to the old capacitor. Capacitors typically have three terminals: "HERM" (Hermetic Compressor), "FAN" (Fan Motor), and "C" (Common).
- Remove Old Capacitor: Disconnect the wires from the old capacitor and remove it from its mounting bracket.
- Install New Capacitor: Place the new ClimaTek capacitor into the mounting bracket.
- Connect Wiring: Reconnect the wires to the corresponding terminals on the new capacitor. Ensure connections are secure and match the original configuration.
- Secure Panel: Close and secure the access panel on your HVAC unit.
- Restore Power: Turn the main power switch for your HVAC unit back ON.
- Test Unit: Test the HVAC unit to ensure it operates correctly.
Note: The ClimaTek capacitor is designed to replace Coleman part numbers 1499-4931 and 1499-4921. Always confirm the MFD (microfarad) and VAC (voltage) ratings match your system's requirements.
Operating Principles
The ClimaTek Round Capacitor functions as a dual-run capacitor, meaning it serves both the compressor motor and the fan motor in an HVAC system. It provides the necessary phase shift and energy storage to efficiently start and continuously run these motors. The 30/5 uf MFD rating indicates 30 microfarads for the compressor (HERM) and 5 microfarads for the fan (FAN), both sharing a common terminal (C). The 370/440 Volt VAC rating signifies its compatibility with systems operating within this voltage range.
Maintenance
Capacitors are generally sealed units and require minimal maintenance. However, periodic inspection can help identify potential issues before they lead to system failure.
- Visual Inspection (Annually): With power disconnected and capacitor discharged, visually inspect the capacitor for signs of swelling, leaks, or corrosion around the terminals. These are indicators of a failing capacitor.
- Cleanliness: Ensure the area around the capacitor is free from dust and debris, which can impede heat dissipation.
- Terminal Connections: Check that all wire connections to the terminals are secure and free from corrosion.
Note: Do not attempt to repair a faulty capacitor. If signs of failure are present, the capacitor must be replaced.
Troubleshooting
A failing capacitor is a common cause of HVAC system issues. Here are some symptoms and potential solutions:
| Symptom | Possible Cause | Solution |
|---|---|---|
| Outdoor unit hums but fan/compressor does not start. | Failed run capacitor. | Replace the capacitor. |
| Fan motor runs, but compressor does not. | Compressor section of dual capacitor failed. | Replace the capacitor. |
| Compressor runs, but fan motor does not. | Fan section of dual capacitor failed. | Replace the capacitor. |
| Unit trips circuit breaker frequently. | Short-circuited capacitor. | Replace the capacitor. |
Important: Always disconnect power and discharge the capacitor before performing any troubleshooting or replacement. If you are unsure, contact a professional HVAC technician.
Specifications
| Feature | Detail |
|---|---|
| Product Type | Round Dual Run Capacitor |
| Capacitance (MFD) | 30/5 uf (Microfarad) |
| Voltage (VAC) | 370/440 Volt |
| Compatibility | Direct replacement for Coleman # 1499-4931, 1499-4921 |
| Dimensions | Approximately 3 x 3 x 4 inches |
| Weight | Approximately 9 ounces |
| Manufacturer | ClimaTek |
Warranty Information
ClimaTek products are built to last. For specific warranty details regarding your ClimaTek Round Capacitor, please refer to the warranty card included with your purchase or visit the official ClimaTek website. Typically, replacement parts carry a limited warranty against manufacturing defects.
Customer Support
If you have any questions, require technical assistance, or need to report an issue with your ClimaTek Round Capacitor, please contact ClimaTek customer support. You can find contact information on the product packaging or by visiting the official ClimaTek website. When contacting support, please have your product model number (1499-4931 / 1499-4921) and purchase details ready.
For more information, visit the ClimaTek Store on Amazon.





