The decision to repair or replace your HVAC system depends on several factors. Age, energy efficiency, and repair costs all play critical roles. As a rule of thumb, if your system is over 10 years old and frequently breaking down, a replacement might be more cost effective.
However, if the unit is newer and the repairs are minor, fixing the problem is often the better choice. Be on the lookout for erratic performance, high energy bills, or uncomfortable indoor temperatures. These are clear indications that your system needs attention, and consulting with an HVAC specialist for a risk assessment will guide you on the best course of action.