Common Problems With PTAC Units


Common Problems With PTAC Units

Packaged Terminal Air Cooling (PTAC) units are famous for providing environmental control in numerous private and business settings. They are normally found in lodgings, apartment complexes, workplaces, and, surprisingly, individual homes. While PTAC units are dependable, similar to any mechanical framework, they can experience issues over the long haul. In this blog entry, we’ll investigate some of the normal issues related to PTAC units, their causes, and likely arrangements.

Addressing Water Leaks Caused by PTAC Units in Your Apartment

PTAC units are ordinarily introduced in a loft’s front room, with less ventilation than the outside. Consequently, dampness develops inside the PTAC itself if it isn’t as expected (for example, activation of the unit by the occupant after the warming or cooling season). Dampness gathers inside the PTAC unit when the unit isn’t run for significant periods, which can make water develop inside.

The water can bring on some issues, like form on the PTAC unit itself, decay in the walls on the off chance that it spills through them, and even harm to different articles in a home.

Solution: During the cooling season, dampness is kept from happening by utilizing a dehumidifier throughout the colder time of year. Dampness development can be observed by checking the channel prospect development. If it is full, seepage openings should be made bigger so that much buildup and development will diminish.

Buildup and development can likewise be dispensed with by appropriately keeping a PTAC unit and overhauling it yearly to guarantee legitimate capability.

Humming or Crackling Sounds from PTAC Unit

While this issue isn’t guaranteed to create issues for the PTAC unit, hearing it in your home is irritating. The murmuring or snapping commotion heard when a wide range of elements can bring about the fan in the PTAC runs. The wellspring of the commotion will assume a significant part in deciding the best answer to the issue.

A horrible cutting edge in the PTAC unit can bring about commotion. This issue is frequently simple to recognize because there will be a boisterous commotion inside the unit when it’s turned on, and there will likewise be a noticeable hole between the two fans within the unit. Nonetheless, the commotion can likewise be brought about by a defective or broken mounting section joined to the roof or wall that upholds the actual unit.

Solution: In the event that a free cutting edge is bringing about the commotion, you can purchase another one and supplant it without requiring a lot of exertion. If, notwithstanding, the commotion is coming about because of a flawed or broken mounting section, the issue will be more challenging to fix.

It’s relatively inexpensive and needs proficient help to handle this issue. It can frequently be fixed by introducing one more PTAC instead of the ongoing one.

AC Not Dispensing Hot or Cold Air

Another normal issue is the A.C. unit not turning on. The most probable reason for this in numerous units is a stopped-up air channel. At the point when it doesn’t turn on, turning it off and then connecting it back the PTAC frequently fixes the issue by delivering an inward switch that was stuck when flotsam and jetsam obstructed it.

Other normal issues include obstructed barbecues and channels in front of PTAC units because of pet hair or other trash being blown into them from air attempting to travel into the room. There may likewise be an issue with the indoor regulator.

Solution: Trash can be cleared out of barbecues, channels, PTAC units themselves, and so forth to guarantee the appropriate working of the unit. Vacuuming these channels can have an extraordinary effect on air quality, and vacuuming the channel once a month is encouraged.

In the event of indoor regulator issues, having somebody look at or change the indoor regulator into one appropriately measured for the room space will frequently fix issues with the warming or cooling not working as expected. A help call is likewise useful if other issues are more complex fixes.

Discrepancy in Temperature

If your room isn’t reaching the desired temperature, addressing common thermostat issues is essential. Sometimes, the thermostat may become frozen, causing the heating or air conditioning to remain stuck in one mode. Additionally, it might seem like there are no temperature control options when there are, in fact, two settings available: “on” and “fan-only.”

Solution: To prevent the thermostat from freezing, maintain a reasonably warm room temperature. If the issue persists, use a hairdryer or heat gun to thaw any remaining ice.

Furthermore, ensure that the heating and cooling feature is active. The “on” setting enables both heating and cooling alongside the fan. If this isn’t the problem, it may be time to contact a professional and schedule a service visit. This proactive step can help ensure your thermostat functions correctly and maintains your desired room temperature.

Issues with Push Buttons’ Functionality

If you encounter unresponsive push button issues, the problem likely resides within the button panel or its components. Identifying the source of the problem is often based on which specific button is malfunctioning. If the on/off switch isn’t functioning correctly, it could indicate problems like faulty wiring or a loose connection for that specific component. On the other hand, if the directional setting buttons aren’t working properly, there might be an issue with the controller itself.

Solution: Resolving these issues may involve replacing the entire button panel, especially if multiple buttons malfunction. However, for isolated button problems, a simple solution might involve using a can of compressed air to clear any debris or obstructions. Attempting DIY work on internal components like motherboards can be challenging and may not be advisable. It’s recommended to seek professional assistance at a service center to address these issues effectively.

If the issue isn’t related to the on/off switch, the most common cause is the accumulation of debris behind or inside the buttons. A thorough cleaning can often resolve the problem. If cleaning doesn’t solve the issue, there are likely underlying problems with the button panel itself, necessitating professional repair.

Frost Accumulation on PTAC Unit

Ice formation on PTAC (Packaged Terminal Air Conditioning) units is a common issue that can result from either thermostat problems or a malfunctioning internal fan. Ice accumulation can lead to various risks and challenges, including the unit ceasing to function correctly, frequent cycling, or even short-circuiting in severe cases.

Solution: Before contemplating the replacement of PTAC units, consider these potential solutions:

  1. Thermostat Malfunction: If you suspect a thermostat issue, consider scheduling a service visit to address and rectify the problem. If necessary, ensure you turn off the PTAC unit at the breaker to prevent further damage or electrical fire hazards due to overheating.
  2. Fan Damage from Ice: If the fan has been damaged by ice buildup, arranging for professional cleaning or maintenance of the PTAC unit can often resolve the issue.
  3. Preventive Measures: To prevent recurring ice buildup, maintain the thermostat in a room with reasonably warmer temperatures. Regular servicing and cleaning can help prevent ice-related problems.

If you’ve attempted these solutions without success and the problem persists, you may need to allocate budget resources to replace the PTAC unit. This step should be considered after exploring all available repair options.

Circuit Breaker/Fuse Tripping Occurrence

Circuit breaker tripping is a prevalent issue associated with PTAC (Packaged Terminal Air Conditioning) units. While circuit protection is essential for safety, recurring tripping can signify underlying problems with the unit.

Cause: Tripping can occur when the circuit breaker unexpectedly switches off. The cause depends on the circumstances:

  1. Wiring Issues: If the circuit breaker trips when the PTAC unit is not in heavy use or running at all, it suggests potential wiring problems within the unit. These issues may arise due to wear and tear or improper handling during installation.
  2. Airflow Problems: If the circuit breaker trips when numerous electronic devices are used, it may indicate insufficient airflow through the venting system. Blockages or obstructions in the vents can impede proper heat distribution, leading to circuit breaker trips.

Solution: To address circuit breaker tripping:

  • If the tripping is an isolated incident, have the unit inspected. In some cases, simple cleaning or maintenance can resolve the issue.
  • If wiring issues are suspected, consult an electrician for repairs.
  • For airflow-related problems causing tripping, contact a service center like WeatherMakersNYC for professional evaluation and repairs.

In rare cases, additional parts or accessories may be required for the PTAC unit, which may not be included in the initial purchase. Professional assessment and repair are essential to ensure the unit’s proper function and prevent recurring circuit breaker trips.

Draft of Cold Air Emanating from Unit Sides

Experiencing a cold draft emanating from the sides of your PTAC (Packaged Terminal Air Conditioning) unit is a common issue attributed to various factors. In most instances, a cold draft signifies a problem with the unit’s blower, which may necessitate further inspection and potential repairs or replacements. However, there are other potential causes to consider:

Potential Causes:

  1. Blower Problems: A cold draft is frequently a symptom of blower issues within the PTAC unit, indicating a need for inspection and, if required, blower replacement.
  2. Insufficient Insulation: In some cases, the lack of insulation in the wall cavity where the PTAC is installed can contribute to cold drafts.
  3. Seams and Gaps: Air infiltration through seams or gaps in the unit can also create drafts.
  4. Exterior Air Infiltration: Cold drafts may result from outdoor air entering the venting system, highlighting the importance of proper unit sealing.

It’s crucial to note that cold drafts can lead to issues like burst hot water coils in PTAC units, underscoring the importance of regular maintenance by a service technician to prevent such problems.


  • If the cold draft originates from the sides of the unit due to blower problems, it’s advisable to have the blower inspected and replaced, if necessary, by a qualified technician.
  • If the draft is linked to a lack of insulation in the cavity, consider a DIY project to add insulation and install weather stripping around the unit to reduce drafts.
  • However, in most cases, it’s prudent to seek professional assistance. A cold draft from your PTAC unit may indicate broader sealing or insulation issues that can lead to various problems. Contacting an expert is the best action to diagnose and resolve the underlying cause.

In summary, addressing cold drafts from your PTAC unit is essential for maintaining comfort and efficiency. Whether it’s a blower problem, insulation issue, or air infiltration, seeking professional help when needed is crucial to ensure your unit operates optimally and efficiently.

Growth of Black Mold in Air Vents

Mold, particularly black mold, poses significant health risks and should be addressed promptly to ensure a safe living environment. In PTAC (Packaged Terminal Air Conditioning) units, mold growth is often associated with condensation and can result from various factors. Addressing the root cause is essential for effective mold removal and prevention.

Causes of Mold Growth in PTAC Units:

  1. Condensation: Moisture accumulation on the exterior of the PTAC unit during cooling cycles can create an environment conducive to mold growth if not allowed to dry properly.
  2. Inadequate Ventilation: Poor ventilation can trap moisture, increasing the risk of mold development.
  3. High Humidity Levels: Elevated indoor humidity levels can contribute to mold growth. Maintaining appropriate humidity levels is crucial.
  4. Dirty Air Filters: Clogged or dirty air filters can hinder proper airflow, potentially exacerbating moisture-related issues.


To address mold growth in PTAC units, follow these steps:

  1. Identify and Address the Root Cause: Determine the cause of mold growth, whether condensation, inadequate ventilation, high humidity, or dirty air filters.
  2. Condensation Control: If condensation is the issue, use a dehumidifier in the room where the PTAC unit is installed to reduce moisture levels. Ensure that the unit has proper ventilation to facilitate moisture evaporation.
  3. Humidity Management: Maintain indoor humidity at appropriate levels to prevent mold growth. A dehumidifier can help control high humidity conditions.
  4. Air Filter Maintenance: Regularly inspect and clean or replace air filters to ensure efficient airflow and prevent mold-promoting conditions.
  5. Professional Assistance: If mold growth is extensive or persistent, seek professional help for mold removal and remediation. Mold can pose health risks, so its proper removal is essential.
  6. Preventive Measures: Implement preventive measures to avoid future mold issues, including regular maintenance of your PTAC unit and monitoring indoor humidity levels.

Mold is a serious concern for health and indoor air quality. Swift action to identify and eliminate the cause of mold growth, followed by proper cleaning and maintenance, is essential. Suppose you need help with mold removal from your PTAC unit or any aspect of HVAC maintenance. In that case, it’s advisable to consult professionals to ensure a safe and healthy living space.

Final Thoughts

Certainly! In conclusion, PTAC (Packaged Terminal Air Conditioning) units are efficient and versatile solutions for heating and cooling in apartments and various settings. However, they can encounter common problems that require attention and prompt resolution.

Regular maintenance and prompt troubleshooting are essential to keep your PTAC unit operating efficiently and prevent potential issues. Some common problems include inadequate cooling or heating, noisy operation, water leakage, electrical problems, poor airflow, frozen coils, thermostat malfunctions, and unpleasant odors.

When addressing these problems, following specific troubleshooting steps and seeking professional assistance is important. Taking timely action can extend the lifespan of your PTAC unit and ensure comfort in your living or working space. Remember, proper maintenance, periodic servicing, and addressing issues promptly are key to enjoying the benefits of your PTAC unit while minimizing potential disruptions and health risks associated with problems like mold growth. By staying proactive and seeking expert help when necessary, you can maximize the efficiency and longevity of your PTAC unit, ensuring consistent comfort and air quality in your environment.


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