No heating or cooling
The unit may not be starting, may stop on a fault or may run without delivering the needed temperature. Diagnosis follows the installed equipment and the conditions during the complaint.
Existing commercial rooftop equipment
Rooftop Unit Repair & Service in NYC
Rooftop unit not heating, not cooling or repeatedly shutting down? Airplex provides commercial RTU repair and service across NYC and Northern New Jersey, with diagnosis that considers the unit, controls and the spaces it serves.
NYC & Northern NJ
Commercial & industrial HVAC
Equipment-specific service
The service decision
Get a repair plan for the whole rooftop system
A packaged rooftop unit brings several functions into one cabinet. A comfort complaint can involve heating or cooling components, the supply fan, outdoor-air dampers or controls. Airplex investigates the operating problem, explains the repair findings and identifies when a separate airflow, maintenance or replacement issue also needs attention.
Site coordination
Service that fits the building
Roof keys, access restrictions and occupied spaces below the unit can affect service in NYC and Northern NJ buildings. You can start with the address and symptoms; the equipment details and access plan can follow.
- A sound unit with an isolated fault
- Recurring failures or a changed space
- The complete replacement cost
UNDERSTAND THE PROBLEM
Common RTU service concerns
These symptoms describe a service need; they do not identify a failed part on their own.
Air is moving, but rooms are uncomfortable
Fan operation alone does not prove that heating, cooling or outdoor-air control is correct. Room conditions and air delivery help separate a unit problem from a distribution problem.
Noise, water or repeat shutdowns
These deserve a review of the location, operating pattern and service history. Repeated resets can erase useful context without resolving the cause.
YOUR SERVICE OPTIONS
What RTU service should address
The proposed work should connect the finding to the result you need.
Targeted repair
We diagnose the reported fault, explain the repair options and check the relevant operation after approved work. If the investigation reveals a separate airflow or controls problem, we identify it as further work.
Maintenance needs found during service
We identify filter, coil, drainage and moving-component needs appropriate to the model. Routine care and repair findings remain distinct so you know what each item addresses.
Connected controls and economizer issues
A rooftop system can have a controller, schedules and outdoor-air accessories that affect comfort. Access to a building platform and any specialist controls work must be confirmed.
PLAN THE NEXT STEP
Know when to compare replacement
A repair decision should include the condition around the failed component.
A sound unit with an isolated fault
A defined repair can be sensible when it restores useful operation and the rest of the unit remains serviceable.
Recurring failures or a changed space
Replacement deserves a closer look when repairs leave wider condition or coverage problems unresolved. Age alone is not a complete diagnosis.
The complete replacement cost
Roof access, lifting, curb fit, connections and controls can change the project cost. Compare that complete scope with the repair, not just the price of a new unit.
PRICING FACTORS
What affects the cost?
The fault, model, parts and roof access affect an RTU repair. Work may also involve connected controls or air-delivery issues. Ask the proposal to separate the immediate repair from maintenance findings and any replacement recommendation.
One rooftop cabinet contains several working systems
A packaged rooftop unit can combine cooling, heating, air movement and outdoor-air functions. Those functions do not necessarily fail together. A unit may move air without cooling it adequately, or cool the space while an outdoor-air component needs attention. The service investigation should identify the missing function rather than reduce every complaint to the compressor.
The connected ductwork and controls remain part of the occupied result. If some rooms are comfortable and another is not, the review may need to follow air delivery beyond the roof. Replacing a major rooftop component will not automatically correct an unsuitable zone or altered room layout.
What the timing of a rooftop fault can reveal
A unit that never starts presents a different problem from one that runs for a period and stops. A complaint that appears only during a particular operating mode also needs that mode included in the investigation. The timing helps the technician select relevant checks; it does not make a fault code a complete diagnosis.
For example, a hypothetical shop may cool adequately in one period but struggle after occupancy increases. The finding may involve equipment performance, controls or the duty now required. A useful repair recommendation explains which evidence supports the chosen correction and which building conditions remain relevant afterward.
Look beyond filter changes
Filters are one maintenance item in a unit with several functional sections. A useful rooftop plan identifies the installed components and the appropriate preventive tasks, then records defects separately. It should give the owner a clearer view of condition than a simple notation that the unit was running at departure.
Seasonal work should prepare the functions the building will need, while the service history keeps recurring alarms and repairs visible. If the same symptom returns, the next visit should use that history to reassess the explanation. Maintenance is valuable evidence for future investment, but it is not a guarantee against every breakdown.
Decide what the next repair buys
A focused repair can restore a useful RTU when the rest of the equipment remains suitable. A major repair on a unit with several unresolved conditions deserves a wider comparison. The question is what function and condition remain after the work, not simply whether repair is technically possible.
When replacement is an alternative, compare the complete rooftop installation, including removal, connections, controls and any roof or distribution work. The dedicated installation page addresses that project in more detail. Keeping service diagnosis and replacement planning distinct helps the owner make an informed choice without turning every service call into an equipment sale.
Questions before you request service
Rooftop Unit Repair & Service questions
Does a rooftop unit running mean it is working correctly?
No. The fan can run while cooling, heating or outdoor-air control is not working as intended. The complaint and operating checks determine what needs repair.
Can the repair wait for routine maintenance?
Mention the active problem when requesting service. Loss of heating or cooling, water or repeated shutdowns may need a repair investigation that is different from planned maintenance.
Can new partitions change what an existing rooftop system needs to do?
Yes. Dividing an open area can change air delivery and control-zone needs even when the rooftop unit remains serviceable. Review the rooms, distribution and controls before assuming the unit is too small or defective. A local alteration may be needed alongside maintenance, and a larger RTU alone may not resolve it.
Should an RTU be replaced after a major component fails?
Not automatically. Compare the diagnosed repair with the condition of the components that would remain, parts support and the building requirement. Replacement becomes a more useful comparison when several major issues or suitability concerns exist. The complete installation scope should be included in that decision.
We are factory-authorized service technicians for:
Your next step
Request rooftop unit service
Tell us what is happening or what you want to change. You do not need to diagnose the system or assemble every equipment record before contacting Airplex.