Rooftop unit diagnosis
Mechanical, refrigeration, electrical and control checks.
Commercial rooftop HVAC
Rooftop Package Unit Repairs, Service & Maintenance
Rooftop packaged air conditioners combine major cooling and airflow components in one outdoor assembly. Topworks provides breakdown diagnosis, service and maintenance for commercial and industrial rooftop units.
Service scope
Practical repairs for residential, commercial and industrial systems
Rooftop packaged air conditioners combine major cooling and airflow components in one outdoor assembly. Topworks provides breakdown diagnosis, service and maintenance for commercial and industrial rooftop units.
Coil & filter maintenance
Condenser, evaporator, filters, drains and cabinet condition.
Fan & belt repairs
Motors, bearings, pulleys, belts and airflow.
Refrigerant circuits
Leak detection, pressure testing, vacuum and charging.
Controls & safeties
Contactors, overloads, sensors, thermostats and interlocks.
Planned maintenance
Inspection reports and corrective-work planning.
Faults investigated
Problems our technicians diagnose
- Unit trips during the hottest part of the day
- Supply air is warm or airflow is low
- Condenser fans do not run correctly
- Compressor trips on overload or pressure
- Belts slip, break or create noise
- Control panel shows repeated alarms
Diagnosis before replacement
How the service is handled
Rooftop work includes safe access planning. The technician checks filters, coils, fans, belts, compressors, refrigerant condition, electrical components and control sequence. Larger repairs are quoted with parts, access and commissioning requirements.
- Clear fault assessment
- Written quotation before major work
- Testing after repair or service
- Maintenance recommendations where relevant
Information to send when booking
Share the location, equipment brand, model if visible, system type, fault symptoms, when the problem started and photographs of the indoor and outdoor equipment.
Send Details on WhatsAppIndicative 2026 pricing
Service price guide
These ranges show typical starting points. The final quotation depends on system size, access, parts, refrigerant and the fault found.
| Service | Indicative price | Typical inclusion |
|---|---|---|
| Rooftop diagnostic call-out | R1,500–R3,500 | Initial inspection and testing |
| Rooftop major service | R2,500–R6,500 | Filters, coils, fans, drains and checks |
| Leak detection / pressure test | R2,500–R6,000 | Circuit size and access dependent |
| Fan or belt repair labour | R1,500–R4,500 | Parts excluded |
| Compressor replacement | Site-specific quote | Lifting, parts, refrigerant and commissioning |
Pricing note: Prices are 2026 estimates for standard access and are confirmed in writing after inspection. Spare parts, refrigerant quantity, cranes or access equipment, electrical upgrades, travel outside core service areas and VAT may be additional unless specifically included in the quotation.
View the complete aircon and HVAC price list →Customer questions
Frequently asked questions
What is a rooftop package unit?
It is a packaged HVAC unit installed outdoors, often on a roof, that contains refrigeration and airflow components serving a ducted building system.
Can you repair a rooftop unit that trips?
Yes. Trips can be caused by airflow, dirty coils, fan faults, electrical problems, pressure conditions, sensors or compressor issues.
Do rooftop units need regular maintenance?
Yes. Their outdoor position and high operating hours make filter, coil, fan, belt, drain and electrical maintenance important.
Is roof access included in the price?
Standard safe access may be included in the quoted scope. Scaffolding, lifts, cranes, permits or special safety arrangements cost extra.
Can you replace a rooftop compressor?
Yes, subject to model, parts, lifting, circuit condition and the economic viability of the repair.
Book an air-conditioning inspection
Send the equipment type, brand, location and fault description for a faster response.