Knowledge base
Air conditioning guides and fault advice
Legacy Air technicians answer the questions we hear most often in Mulbarton and across Johannesburg: why a unit stops cooling, how often it genuinely needs a service, and how to size a new system so it runs efficiently. Each guide is written from field work, not from a brochure, and every recommendation is something we would apply in your home or building ourselves.
3 published guides
Choosing the Right Aircon Size: A Practical Guide for South African Homes
An undersized unit runs flat out and never satisfies the room, while an oversized one short cycles and leaves the space clammy. Here is how capacity, glazing and inverter technology decide the right choice.
Why Your Aircon Has Stopped Cooling: A Troubleshooting Guide for Johannesburg Homes
Work through the most common reasons an air conditioner stops cooling, from a blocked filter to a refrigerant leak, and know exactly when to stop and call a technician.
How Often Should You Service Your Aircon in Johannesburg?
Six to twelve months is the standard answer, but Highveld dust, load-shedding and daily summer use change the calculation. Here is how to set a realistic servicing interval.
Still not sure what is wrong with your system? A technician can diagnose it on site.