What Seasonal Change Reveals About HVAC/R Performance
The Clue Is in the Contrast
Thermal imaging is often less about finding the hottest point and more about finding what looks different from what should be around it. A component may be unusually warm, unexpectedly cool, or simply show a temperature pattern that does not match comparable equipment.
A poor electrical connection may appear hotter than neighboring components, while a failed fuse or inactive circuit may appear cooler. Across HVAC/R systems, the same principle applies: faults alter the temperature pattern you would normally expect to see.
The important clue is not simply hot or cold. It is what stands out from everything around it.
HVAC system leaking to ceiling.
Temperature patterns help verify whether coils are operating as expected.
Thermal imaging reveals unexpected temperature patterns caused by air leaks or damaged insulation.
Five Places Temperature Can Give the Game Away
Across a typical HVAC/R inspection, there are several areas where a thermal pattern can provide useful evidence:
- Condenser coils can reveal temperature differences associated with restricted airflow, low refrigerant or leakage.
- Ductwork can show where conditioned air is escaping or insulation has deteriorated, creating visible temperature differences and unnecessary energy loss.
- Electrical components can reveal abnormal heating around connections, circuits or components that warrant further investigation.
- Radiant floor systems can be viewed across a wide area, making uneven heating and problem zones easier to locate without invasive investigation.
- And coil temperatures can be checked quickly to help confirm whether equipment is operating within its intended specification.
None of these is particularly dramatic on its own. That is rather the point. Efficiency losses rarely arrive with flashing lights. More often, they accumulate quietly: a little more runtime, slightly poorer heat transfer, a room that takes longer to reach temperature, energy being used without quite delivering the result it should.
Thermal imaging makes those small differences harder to overlook.
Thermal imaging reveals abnormal heating around electrical components and connections.
Thermal imaging shows uneven heating and helps locate cold or problem areas.
Thermal patterns can indicate restricted airflow, low refrigerant, or leakage.
The Extech BR95 compact borescope gives technicians a closer look inside HVAC equipment without dismantling it first.
A Closer Look Inside
Not every HVAC/R problem leaves a clear thermal signature. Some simply sit somewhere you cannot easily see.
A compact borescope allows technicians to inspect inside equipment and other difficult-to-access areas without needing to dismantle the entire system. It can help reveal physical issues such as debris, corrosion, damaged components or blockages that may be contributing to poor performance.
Used alongside thermal imaging and other test instruments, visual inspection adds another piece of evidence to the diagnosis. Thermal can show where something looks unusual; a borescope can help reveal what is physically happening there.
Diagnosis is only half the job
Once a repair has been made, the same temperature information can help verify the result. A previously uneven radiant floor can be checked again. A repaired duct can be inspected for the unexpected temperature pattern that first gave the leak away. Coil performance can be reassessed.
That before-and-after comparison also gives technicians something useful to show the customer.
Thermal images provide visual documentation of both potential problems and the results after they have been addressed, while compatible cameras can generate images that can be added to reports or shared digitally. The underlying idea is straightforward: a customer does not have to take somebody’s word for it when they can see the difference themselves.
Thermal imaging reveals an issue in the motor control center.
Motor control center after corrective action.
TOOLS OF THE TRADE The Right Tools for HVAC/R
