Condo Heat Pump Repair, Maintenance
& Replacement Services In Toronto & GTA

Finding a refrigerant leak in a condo heat pump requires more than simply “adding refrigerant.” If the system is low on refrigerant, it usually means there is a leak somewhere in the sealed refrigeration circuit. A licensed HVAC technician must properly diagnose the system, locate the leak, and determine whether repair or replacement is the best option.

At Home Trade Standards, our technicians use a step-by-step diagnostic process to identify refrigerant leaks in condo heat pumps.

1. System Performance Check

The first step is to test how the heat pump is operating. A technician will check:

• Supply and return air temperature
• Heating and cooling performance
• Compressor operation
• Water flow through the heat pump
• Refrigerant pressures
• Electrical components
• Thermostat operation

Low refrigerant may cause poor cooling, poor heating, ice buildup, short cycling, high compressor temperature, or repeated lockouts.

2. Refrigerant Pressure Testing

The technician connects professional gauges to the heat pump to measure the system’s refrigerant pressures. If the pressures are lower than expected, or if the system is not operating within manufacturer specifications, this may indicate a refrigerant leak or another internal issue.

Pressure readings alone do not always confirm the exact leak location, but they help determine whether further leak testing is required.

3. Electronic Leak Detection

An electronic refrigerant leak detector is used to scan common leak points, including:

• Service valves
• Schrader cores
• Refrigerant fittings
• Brazed joints
• Evaporator coil
• Coaxial water coil
• Compressor connections
• Refrigerant piping inside the unit

This is one of the most common methods for locating active refrigerant leaks in condo heat pumps.

4. Nitrogen Pressure Test

If the leak is not obvious, the technician may recover the remaining refrigerant and pressurize the system with nitrogen. Nitrogen testing helps confirm whether the refrigeration circuit is holding pressure.

If the pressure drops over time, the system has a leak. The technician can then use additional leak detection methods to narrow down the location.

5. Bubble Testing

For accessible fittings, valves, and joints, a bubble solution may be applied while the system is under pressure. If bubbles form, this confirms the leak location.

Bubble testing is simple but effective, especially around visible joints and service ports.

6. UV Dye Testing

In some cases, UV dye may be added to the refrigeration circuit. The system is then operated, and the technician returns later to inspect the system with a UV light. Dye can help reveal small leaks that are difficult to detect during the first visit.

This method is usually used when the leak is slow or intermittent.

Common Refrigerant Leak Locations in Condo Heat Pumps

Refrigerant leaks in condo heat pumps are commonly found at:

• Aging evaporator coils
• Coaxial water coils
• Compressor joints
• Service ports
• Factory brazed connections
• Refrigerant fittings
• Older copper tubing
• Areas affected by vibration or corrosion

In older water-source heat pumps, leaks may also occur in the coaxial heat exchanger. This is a serious issue because it may allow refrigerant and system water to interact, depending on the failure location.

Can a Refrigerant Leak Be Repaired?

Sometimes, yes. If the leak is located at an accessible fitting, valve, or brazed joint, the technician may be able to repair it.

However, if the leak is inside the evaporator coil, coaxial coil, or another major internal component, replacement of the component — or the entire heat pump — may be more practical.

For older condo heat pumps, especially R22 systems, repair may not be cost-effective because:

• R22 refrigerant is expensive and phased out
• Parts may be obsolete or difficult to source
• Coil repairs may not be reliable long-term
• The compressor may already be stressed from operating low on refrigerant
• A leak repair does not guarantee another leak will not appear later

Why You Should Not Just Add Refrigerant

Adding refrigerant without finding the leak is not a proper repair. A heat pump is a sealed system, so refrigerant should not disappear under normal operation.

If refrigerant is added without repairing the leak:

• The system may fail again
• The compressor may be damaged
• Cooling and heating performance may remain poor
• Refrigerant may continue leaking
• Repair costs may increase over time

A proper diagnosis protects both the equipment and the condo owner from repeated service calls.

Professional Refrigerant Leak Detection for Condo Heat Pumps

Home Trade Standards provides refrigerant leak detection, diagnosis, repair recommendations, and heat pump replacement services for condo owners and property managers across Toronto and the GTA.

Our technicians understand condominium heat pump systems, including older R22 water-source heat pumps, vertical heat pumps, horizontal heat pumps, and custom replacement applications.

If your condo heat pump is not cooling, not heating, freezing up, or repeatedly needing refrigerant, it may be time for a professional leak inspection.