An RTU is a type of HVAC system that combines all the components required to supply conditioned air into a single compact unit. Rooftop unit New York are commonly seen in both large and small business buildings. Industrial and retail assets are in high demand.

An RTU unit is often a large metal box with components such as an expansion device, compressor, air-cooled condenser, and evaporator. The RTU unit in your building not only keeps the temperature steady, but it also has an impact on safety, productivity, and energy costs.

Rooftop units are more durable and impervious to water. They’re designed to keep snow, dirt, rain, and even small animals out while yet allowing air to flow through.

Adopting a preventative maintenance regimen is critical to ensuring that your rooftop unit system runs smoothly and efficiently. Even a well-maintained system, though, may require maintenance from time to time.

Preventative maintenance combined with the correct service plan is the most reliable approach to extend the life of your rooftop unit. RTU units lose their energy efficiency quickly if they are not properly maintained.

In general, there are numerous issues that must be addressed. Let’s look at the top ten most common rooftop air conditioner unit issues.

1. Dirty Coils

If the RTU unit’s coil is extremely filthy. As a result, it will have a difficult time extracting heat from the atmosphere. This can cause the condensation that collects on the coil to freeze, which exacerbates the situation. It creates an insulating layer that the system must fight with.

Heat-releasing issues can be caused by dirty coils. The refrigerant will not cool down adequately in this instance, and the air conditioner will be unable to cool your home as efficiently or effectively as it would otherwise.

2. Problem with the Thermostat

Inside your HVAC unit, the thermostat is adjacent to the evaporator coils. If a problem arises, don’t be surprised if it turns out to be a thermostat issue. The thermostat controls the RTU unit’s timing and the amount of cold or hot air it produces. As a result, if your thermostat fails, your building or apartment may experience erratic temperature fluctuations, which might affect your comfort.

You can avoid paying for an unnecessary or costly service call by consulting your RTU unit’s owner’s manual and following the operating instructions.

3. An unbalanced airflow

Before reaching each room, the cooled or heated air from your HVAC unit passes via a series of ducts. Dampers control airflow by reducing airflow in one line while allowing additional conditioned air to pass to other lines. If your rooms don’t heat or cool as quickly as they should, it’s possible that the dampers are out of balance.

4. Refrigerant leakage

The refrigerant is the liquid component that allows air conditioning to work. They’re housed in the coils of an RTU unit, which dehumidifies and cools the air inside.

If you don’t have enough refrigerant in your RTU unit, it won’t be able to do its work correctly, and the air it produces won’t be very cold. The refrigerant problem heats the air within your home or building, causing the condenser to work overtime, causing expensive system troubles.

5. Weird Furnace Noises

A few furnace noises are normal, while others could be an indication or warning of a mechanical issue. A screaming or whining motor indicates that the bearings in the blower or inducer motor have failed.

The engine must be replaced to avoid a furnace failure. Other noises may be caused by dirty burners or poor airflow. As a result, these noises should not be ignored because they may indicate a furnace malfunction.

6. Blown fuses or Tripped Breakers

Blowers that are overworked can cause trip breakers. If something in the RTU unit system is obstructing airflow, the blower will have to work harder to compensate. One of the most common culprits is a clogged air filter.

When the air filter is dirty, the blower must work extra hard to force air through the filter. This is the circumstance where the blower’s energy usage increases, causing the breaker to trip. Blowers are also overworked when air registers are clogged or closed, duct leaks are present, or coils are unclean.

7. Continuous blower operation

There are a few reasons why a blower might run indefinitely. First and foremost, make sure the fan switch on the thermostat is turned on. The motor runs constantly if the thermostat is set to the fan on setting. The main cause of this problem is because tenants sometimes leave the fan switch on by accident.

In the furnace, there is a fan relay that turns on the blower when there is a need for heat. If the relay is jammed, the blower will continue to run indefinitely. The furnace has a variety of restrictions and safety features, however if the safety or limit is not reset, the blower will never shut off.

8. Mechanical Deterioration

The mechanical components that make up the RTU’s unit heating system are numerous. The functioning of the unit can be affected by normal wear and tear on these components. Belts and bearings can cause inadequate heating, airflow problems, and even overheating. Regular maintenance of these types of problems should involve checking for stretched or worn-out belts and, if necessary, oiling bearings and motors.

9. Leakage of water

Condensate is produced by every RTU unit. Drainage is accomplished using suitable drainpipes. The furnace causes water to leak if the drainage lines are damaged or clogged. Cleaning with bleach on a regular basis might help avoid water leaking.

The heat exchanger, evaporator drain tank, or collector box are all possible leak sources.

10. Problems with Ignition or Pilot

Ignition or pilot issues can be caused by a variety of factors. An outage of the pilot, delayed ignition, short cycling, or the burners’ furnace lockout can be caused by a flame sensor, burner, or unclean pilot. It could also be due to a gas supply issue or the wear and tear of an igniting component that must be replaced, such as the hot surface thermocouple or ignite.



By understanding where a mechanical problem in your RTU unit might originate, you can take proactive steps to ensure it is in good working order and avoid major problems before they occur. Being aware of your HVAC system’s requirements can improve efficiency, reduce wasteful energy use and costs, and keep you happy as well as comfortable.


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